Grado SR-125                                  

Features:
Vented diaphragm
Non Resonant air chamber
UHPLC copper voice coil wire
Standard copper connecting cord

Tranducer type dynamic 
Operating principle open air 
Frequency response 20-20
SPL 1mV 98
Normal impedance 32ohms
Driver matched db .1

"We all agreed the Grado SR125 headphones are excellent, and that they would be a fine choice for anyone looking first to audio quality"
By Paul Bergman / Ultra High Fidelity Magazine (Canada) 

Winner of " Critics Choice"
Award presented by SOUND & VISION

"Analytical listening was helped by the well-defined locations of individual instruments and voices. If headphones can be as musically satisfying as this, they must be pretty good."
Gramophone 

"Still, in its own realm the Grado SR125 is a real winner and an excellent value. I cannot imagine a better sounding headphone at anywhere near its price."
- Julian Hirsch - Stereo Review Vol.60, No.5

"It was obvious to me that the members were very impressed by the Grado SR125 headphones."
- Edward Long- Audio Magazine Vol.79, No.8

"Nearly every headphone-using colleague I spoke to in the USA keeps either SR60, SR80, or SR125s handy for reviewing."
- Ken Kessler - HiFi News & Record Review

"simultaneously musical and revealing of every nuance recorded"
- Robert J. Reina- Stereophile

 

 Grado SR-225                                  

Features:
Vented diaphragm
Non Resonant air chamber
UHPLC copper voice coil wire
Standard copper connecting cord

Tranducer type dynamic 
Operating principle open air 
Frequency response 20-22
SPL 1mV 98
Normal impedance 32ohms
Driver matched db .05

HI-FI Choice
"Music flows through this headphone organically and believably, with irrepressible dynamics and bounce." 
HI-FI Choice Recommended

"Sounding very good at both low and high levels, these headphones are of reference quality both for the classical virtues of neutral frequency response and low coloration, as well as for their clarity and the high degree of listener involvement envoked."
HI-FI News & Record Review / Martin Colloms

"The SR225s sound unlike any other headphone. They have an amazingly solid presentation, packed with weight and presence. There is also a pleasant richness in the midrange that benefits all types of music."
WHAT Hi-Fi

"When it comes to classical music, the Grados reproduce instruments with both believable timbre and solidity. The treble boosts fine detail and no hint of agression. ... these Grados are hard to beat!"
WHAT Hi-Fi
 

 Grado SR-225                                  

Features:
Vented diaphragm
Non Resonant air chamber
UHPLC copper voice coil wire
Standard copper connecting cord

Tranducer type dynamic 
Operating principle open air 
Frequency response 20-22
SPL 1mV 98
Normal impedance 32ohms
Driver matched db .05

Features are the same as the SR125 but, this Headphone has an increased air flow by 50% which is achieved through an improved rear metal screen and closer matched drivers. The result is an enlarged soundstage achieved from closer driver tolerances, while the improved rear screen frees the headphone from colorations.

HI-FI Choice
"Music flows through this headphone organically and believably, with irrepressible dynamics and bounce." 
HI-FI Choice Recommended

"Sounding very good at both low and high levels, these headphones are of reference quality both for the classical virtues of neutral frequency response and low coloration, as well as for their clarity and the high degree of listener involvement envoked."
HI-FI News & Record Review / Martin Colloms

"The SR225s sound unlike any other headphone. They have an amazingly solid presentation, packed with weight and presence. There is also a pleasant richness in the midrange that benefits all types of music."
WHAT Hi-Fi

"When it comes to classical music, the Grados reproduce instruments with both believable timbre and solidity. The treble boosts fine detail and no hint of agression. ... these Grados are hard to beat!"
WHAT Hi-Fi
 

 Grado SR-325                                  

Features:
Vented diaphragm
Aluminum air chamber
UHPLC copper voice coil wire
UHPLC copper connecting cord

Tranducer type dynamic 
Operating principle open air 
Frequency response 18-24
SPL 1mV 98
Normal impedance 32ohms
Driver matched db .05


The Top of the Range Prestige Headphone.

What does the i stand for in the new SR325i from Grado? Improved, that’s what! Yes, Grado has taken one of the world’s most acclaimed headphones and taken it a few steps further. The new SR325i has an upgraded driver design, and they have enlarged and improved the mass distribution in the metal housing. The way the SR325i’s new driver and metal housing move air and react to sound vibrations are now less affected by transient distortions. With the SR325i you will notice improved control of the upper and lower range of the frequency spectrum with both better supporting Grado’s world renowned midrange. And why the Gold color? The new SR325i is in honor of their 50th anniversary celebrated recently. The SR325i will produce a sound that is pure Grado, warm harmonic color, rich full bodied vocals, excellent dynamics and an ultra smooth top end. Listen and Enjoy

HI-FI Choice
"…the degree of insight these headphones offer into sounds is really very impressive. This is high quality music reproduction, thoroughly deserving of serious attention."
Richard Black / Hi-FiChoice magazine

What Hi-fi
"...speakers of similar sonic ability as the 325i would set you back at least three grand"
 

 Grado RS-2                                  

Features:
Vented diaphragm
Wooden air chamber
UHPLC copper voice coil wire
UHPLC copper connecting cord

Tranducer type dynamic 
Operating principle open air 
Frequency response 14-28
SPL 1mV 98
Normal impedance 32ohms
Driver matched db .05


The newest edition to the Grado family, the RS2 is the little brother of the RS1. The characteristics of the RS2 remain the same as it's distinguished big brother, with the hand crafted mahogany, but there is a smaller wooden air chamber. Although a miniature version of the RS1, they still maintain an overal sound that is pure Grado, warm harmonic color, full bodied vocals, excellent dynamics and ultra smooth top end. These truly are audiophiles dream. "...the RS2s’ big-hearted sound won us over. It’s more vivid than that of other high-quality headphones—bass is reach and touch-realistic, midrange is clear and true, and treble livelier than any other headphones we’ve tried."
- Steve Guttenberg / CNET

Just as oak barrels enhance the flavor of wine, these mahogany drums refine the sound of music. The earpieces on Grado's RS2 headphones are handcrafted from specially cured wood and have a large open-air chamber. The result is a complex bouquet of decreased distortion, accentuated bass response, warm harmonic tones and a supersmooth top end. Sweet!
- Seth Feman, Wired Magazine

"...it's the full-bodied sound - especially the luscious, rich resonant bass - that makes the Grado 'phones special"
- Sam Telling - STEREOPHILE Vol. 21, No.2

"If you audition the Grado RS2s, you may find something you never heard before: the calm artistry of well made sound."
- Jim Merod, Jazz-Now - Magazine

 Grado RS-1                                  

Features:
Vented diaphragm
Wooden air chamber
UHPLC copper voice coil wire
UHPLC copper connecting cord

Tranducer type dynamic 
Operating principle open air 
Frequency response 12-30
SPL 1mV 98
Normal impedance 32ohms
Driver matched db .05


The RS-1 is the Masterpiece of the Grado collection, the Top Of The Range product which oozes class both in looks and sound.


"RS1 is at its best with instrumental, vocal and small-scale groups, particularly if you like your music up front and personal. The Grados are clearly a music lover’s component, trading a little accuracy and detail for warmth, presence and tonal color – a trade most tube lovers would make any day. Try them on for comfort and sound, you’ll not be disappointed."
- Phil Gold / Inner Ear Magazine

The RS1's are the only product ever nominated by STEREOPHILE for their "PRODUCT OF THE YEAR" distinction, two years in a row! 
"I say that the RS1 is a Masterpiece."
- Ken Kessler, HI-FI NEWS - RECORD REVIEW 
Rated Class "A" on STEREOPHILE'S recommended components list. 

"It's rare that any audio product can come along and simply bowl me over. In this case, I yeild."
-Jack English, STEREOPHILE Vol.19, No.7 

"I would urge any serious headphone listener to audition this Grado RS1." 
-John Borwick, Gramophone 

"One of the years awesome high-end audio achievements"
-Ken Kessler, Robb Report

"The RS1 offers something so stunning that price becomes irrelevant"
-Gavin Isaacs, Audio Video

"If you value headphone listening enough to consider buying a reference dynamic, then you should audition the RS1's."
-Wes Philips, STEREOPHILE Vol.19, No.7

"We've always had bit of a headphone fettish at What Hi-Fi? We're often talking about how they can create your own private universe, plug directly into your favorite piece of music. Now we've heard the Grado RS1s, and our fettish has become an epic, full blown love affair. Ooooh..."
What Hi-Fi

 Grado GS 1000                                  

Features:
Vented diaphragm
Wooden air chamber
UHPLC copper voice coil wire
UHPLC copper connecting cord

Tranducer type dynamic 
Operating principle open air 
Frequency response 8-35
SPL 1mV 98
Normal impedance 32ohms
Driver matched db .05

Grado is pleased to announce the release of the GS1000, the new flagship of our headphone line. 

The GS1000 was shown for the very first time at the International Head-Fi Convention in New York City. The response was just phenomenal. The Grado Statement GS1000 has been on the drawing board for sometime, and we have to admit that this is our finest effort to date.

This new headphone incorporates a redesigned driver, a new and larger wooden housing and much larger foam cushions that are extremely comfortable. 

Grado’s new cushion design actually creates a “room” for the ears to sit, creating a larger soundstage and greater spatial experience for the listener. It was most important to design the correct balance between the driver and our new wooden driver housing to give us the resulting sound that we desired. This has been accomplished. By creating this “room” for the ears to sit, positioning of the cushions with regards to the ears (i.e., forward or back) is somewhat critical in finding the absolute sweet spot.

With this new cushion design, we now believe the GS1000 to be one, if not the most comfortable headphone on the market today.

The new designed driver delivers a top to bottom sound that is extremely balanced. The mass distribution within the new larger wooden housing has also been improved. The way the new driver and wooden housing work together to move air and react to sound vibrations are less affected by transient distortions. The new GS1000 will provide improved control over the upper and lower frequency spectrums while better supporting Grado’s world-renowned midrange.

The GS1000 retains a sound that is pure Grado, rich full-bodied vocals, excellent dynamics and an ultra smooth top end. The presentation is very detailed, the bass is deep and the music is very tight and non-fatiguing. All with a soundstage that is huge allowing for unbelievable separation and layering of the music which is simply stunning.

Listen and enjoy!

Right off the bat, you enter a universe of subtlety and emotion: the bandwidth toward the bottom as well as toward the top seems unlimited. The best, however, is the fact that the GS1000 does it without "bragging" or exaggeration.
- By Henri-Pierre Penel / Prestige Audio Video (France)

The GS1000 exceeds all limits of advances in headphone design... The GS1000 sounds breathtakingly open and transparent. Compared to most other top class headphones, the Grado draws a superior spatial reproduction and makes it easy to feel like being in a concert hall. 
- Martin Freund / HomeElectronic magazine (Switzerland)

 PROLine 2500

The OPEN masterpiece ... PROline 2500

Short description:
Foldable, open-back professional headphones 
with S-Logic™ Natural Surround Sound
MU Metal shielding
Safer hearing
PROline Box incl. accessories
Free demo-CD enclosed

PROline Box contents:
Professional headphones
2 detachable cables: one straight (length 3 m), 
one coiled (length > 3 m) with gold-plated jacks 6,3 mm 
and gold-plated adapter 6,3/3,5 mm
Spare pair of speed-switch ear pads
Demo CD 
Instruction manual 
Transportation bag

Technical specifications:
S-Logic™ Natural Surround Sound
Dynamic principle
Frequency range 8-35.000 Hz
Impedance 40 Ohm
Sound pressure level 94 dB
MU Metal bufferboard, reduced field emissions 
in accordance with ULE standard
Driver 40 mm titanium-plated
Weight 292 g (without cord)

Long-term availability of spare parts

ULE technology and new design
PROline with ULE stands for Ultra Low Emission and means significant benefits for professional users as it is highly developed and specially designed for professionals. The new design does not only distinguish the professional line but also allows due to more ear anatomy area a higher degree of transparency in combination with the spatial sense and understanding.

The ULE technology was systematically developed for professionals 
as they do spend half of their lives in headphones. Most headphone drivers convert an electric signal into an acoustical signal, producing low-frequency magnetic fields. In response, ULTRASONE developed a special MU Metal shielding (ULE technology) to reduce the radiation by up to 98% compared to current headphones. The ULE technology has stood the test of international review and is recommended by technical surveillance organisations.

S-Logic™ Natural Surround Sound
Through the S-Logic™ Natural Surround Sound the usual headphone sound will be moved out of the head in the room around you. The sound is no longer locked in, but appears broad and detached. Directions and distances can be heard and perceived - it’s just like being in a live concert. 
For this new technology additional equipment is not required. Take 
a pair of ULTRASONE headphones plus your sound device and you will be ready for the 3-dimensional enjoyment!

Safer hearing
S-Logic™ Natural Surround Sound allows an up to 40% lower 
dB output (3-4 dB) for the same loudness sensation. This may significantly reduce the risk of hearing damage while ensuring 
hours of fatigue-free listening - an absolute must if you spend 
a lot of time in headphones. 

Character
Using the same stiff titanium-plated driver as PROline 750 within an open-beck design, PROline 2500 will provide you with the most airy sound within the complete line. If you don´t need a closed-back design the PROline 2500 will satisfy your expectations with the most proper, accurate and finest sound reproduction.

Due to professional needs and requests we implemented an additional function which enables you to fold these headphones for a compact storage and easy transportation in a suitcase.

 

Edition9 
is hand-made in Germany. Edition9 is a new pair of headphones with extraordinary qualities. Designed and manufactured with a maximum of attention. You are interested in a pair of headphones with the most sophisticated sound system and the most exclusive materials. Exclusive beauty and high technology at the same time. Take your time and enjoy the finesse in manufacturing and choice of materials. 

The specifically created box allows you to store your Edition9 safely and convenient even for transportation. The earcups are black ruthenium-plated and the insignia on the earcups is made of chrome-plated brass, crafted in Bavaria. Earpads and head pad are made of soft genuine Ethiopian hair sheep leather in dark grey. This is the finest leather available with convincing attributes. This leather is so soft and smooth that you barely feel the headphones on your ears and it provides an excellent isolation. Your Edition9 is equipped with titanium-plated drivers and polished MU Metal shieldings for reduced magnetic field emissions. The set also contains a gold-plated adapter 6,3/3,5 mm. This combination of selected materials and ULTRASONE technologies presents the exceptional accurateness of your Edition9 headphones. Only manufacturers having proved their high standard and qualities by working with the most exclusive and luxurious automotive brands were chosen as suppliers for the realisation of Edition9.

Due to the great feed-back regarding the sold out “Edition7 limited” series, the Edition9 headphones have been developed to meet our customers special requests in design and sound. Edition9 is not limited and disposes of the highest quality materials and the most precise and natural sound appearance. 

S-Logic™ - ULTRASONE´s 
Natural Surround Sound
The patented S-Logic™ technology is described as Natural Surround Sound. No other digital surround system can compare with this new standard. As the sound of normal headphones will sound direct and even on both sides, the S-Logic™ system pushes the sound around your head! It appears as though you are listening to speakers meters away. Even at very low levels, this spacious sound allows you to hear precisely. Edition9 uses titanium-plated drivers which offer the most accurate and finest sound reproduction. And on top, the S-Logic™ technology does not require additional electronic equipment!

How does S-Logic™ work?
S-Logic™ sends music around your head not just into it, because this technology uses decentralized driver positioning. Did you know that all of us use and need the outer ear for 3-dimensional hearing to define the direction and the distance where a sound comes from? Instead of hitting the inner ear directly, with S-Logic™ the signals are reflected off the surface of the outer ear in different directions before entering the auditory canal to create a natural 3-dimensional sound. S-Logic™ is the only headphone system which includes your entire sense of hearing. S-Logic™ does not change your personal hearing. It intensifies it for your individual needs and listening pleasure. S-Logic™ does neither need artificial echo nor digital processing or cross over run time delay (like DSP). You can hear the music just the way the sound mixer produced it. 

ULE technology - ULTRASONE´s 
MU Metal shielding for reduced magnetic field emissions 
ULE stands for Ultra Low Emission. The ULTRASONE ULE technology was systematically developed for professionals as they do spend half of their lives in headphones. Most headphone drivers convert an electric signal into an acoustical signal, producing low-frequency magnetic fields. In response, ULTRASONE developed a special MU Metal shielding (ULE technology) to reduce the radiation by up to 98% compared to current headphones. All professional ULTRASONE headphones are basically equipped with the ULE technology. Certainly your Edition9 headphones may not miss the ULE technology. The exclusiveness of your Edition9 calls for the ULE standard. This patented technology has stood the test of international review and is recommended by technical surveillance organisations.

ULTRASONE´s 
concept for safer hearing
The S-Logic™ technology does not only create a Natural Surround Sound. S-Logic™ allows at the same time a lower dB output (3-4dB) for the same loudness sensation. This may reduce the risk of hearing damage while ensuring hours of fatigue-free listening. However, ULTRASONE generally advises not to listen to music at high volumes to prevent hearing damage.

Specifications
Closed-back headphones 
S-Logic™ Natural Surround Sound 
Professional standard with 
ULE technology (MU Metal shielding) 
Dynamic principle 
Frequency range 8 - 35.000 Hz 
40 mm titanium-plated Mylar drivers 
Impedance 30 Ohms 
Sound pressure level 96 dB
Nominal headband pressure 5,2 N
Cable length 3 m
6,3mm gold-plated plug
3,5 mm adapter
Weight (without cord) 310 g
Warranty 5 years
Hand-made in Germany

 Audio-Technica ATH-W1000 

Features

Successor to Audio-Technica's popular ATH-W100 wooden headphones
D.A.D.S. (Double Air Danping System) for deep bass extension and reproduction
Super high class 8n-OFC with bobbin winding voice coil designed to project sounds in detailed delicacy
Perm-alloy magnetic circuit adoption
Titanium flange phi 53mm driver adoption.
Audio-Technica's unique Wing Support Housing vibration-proof mechanism (PAT) gives comfortable support for a better listening experience
High durability artificial leather eadpads
Wrapping 3.0m 6N-OFC+Hi-OFC hybrid input cord
Wooden sleeve matches headphones in perfect unison

Specifications

Type: Closed Dynamic
Driver Unit: 53mm, Super high class 8n-OFC Bobbin winding voice coil
Magnet: Neodymium
 Frequency response: 5-40,000 Hz
Impedence: 40Ω
Max. Input Power: 2,000mW
Sensitivity: 100dB
Plug: Gold-plating phi 6.3 stereo standards
Cord length: 3.0m (Wrapping / 6N-OFC + Hi-OFC hybrid)
Net weight (without cord): 350g

 

Features

High quality Audio-Technica new generation headphones with super metallic paint
D.A.D.S. (Double Air Danping System) for bass reproduction (D.A.D.S was developed for the legendary Audio-Technica ATH-W2002 Limited Edition Wooden Headphones)
Large aperture phi 53 drivers private design in wide range playback
New 3D Wing Support Housing vibration-proof mechanism (PAT) gives comfortable support for a better listening experience
Wrapping 3.0m OFC input cord
Total ear fitting ear pad design

Specifications

Type: Closed Dynamic
Driver Unit: 53mm, CCAW voice coil
Magnet: Neodymium
Frequency response: 5-35,000 Hz
Impedence: 64Ω
Max. Input Power: 500mW
Sensitivity: 102dB
Plug: Gold-plating stereo mini plug
Cord length: 3.0m (Wrapping / OFC)
Net weight (without cord): 290g

Accessories

Detachable phone plug (stereo standard plug)

Features

Audio-Technica's 2003 flagship clip-on headphones with housing made of Japan's finest Hokkaido cherry tree
World's first wooden clip-on headphones with suprior build quality and finish
Light-weight ear-fitting headphones that offer both style and powerful sound
New sliding ear-fitting mechanism to adjust headphone position conveniently
Soft rubber support and large ear hanger allows long hours of listening without becoming fatigue
28mm neodymium magnet projects powerful sound
Remote friendly 0.5m cord with 1.0m extension cord
Convenient carrying pouch protects your Aluminum headphones

Specifications

Type: Dynamic
Driver Unit: 28mm
Magnet: Neodymium
Frequency response: 14-24,000 Hz
Impedence: 29Ω
Max. Input Power: 100mW（JEITA）
Sensitivity: 105dB
Plug: Mini/Standard Gold plated
Cord length: 0.5m (Single) (OFC) (remote friendly)
Net weight (without cord): 30g

Accessories

Extension cord (1m), Carrying pouch

  "Kuulokkeiden äänentoisto  yllätti minut todella positiivisesti, löi suorastaan ällikällä.  Nyt tiedän, mitä tarkoittaa hyvä äänentoisto napeissa. Välikaapeleita olen vasta trimmaillut mutta hyvältä kuulostavat nekin. Erityisen suuren kiitoksen haluan antaa teille molemmille liikkeessänne; filosofinen keskustelu äänentoistosta ja siihen liittyvistä mielipiteistä oli TODELLA avartavaa. Kuten sanoin, nyt tiedän mitä tarkoitat puhuessasi(=kirjoittaessasi) musikaalisuudesta äänentoiston kohdalla. Väitän, että minulle aukesivat korvat, ei niinkään silmät. Vielä kerran lämpimät kiitokset ja hyvää kohta alkavaa syksyä."

Features

ATH-CK7 is Audio-Technica's all new ultra high quality Inner Ear Earphones features 11 mm Diameter Driver delivers deeper bass, extended treble and higher fidelity, yet remains small enough to fit inside your ear. With neodymium magnet for maximum energy in minimum size; it is far more powerful than conventional Samarium Cobalt or Aluminum magnets. Adopts high elastic elastomer cord/code that well protects the wires inside and hard to entwine. Designed with a simple and classic look. Great for outdoor purposes. Available in silver. Made in Japan. 

Specifications

Type: Dynamic
Driver Unit: Phi 11mm, CCAW voice coil, Neodymium magnet
Output overpressure value: 104dB/mW
Largest input: 250mW (IEC)
Impedance: 16 ohms
Frequency Response: 12 - 24,000Hz
Cord: 1.2m (Y type)
Plug: Phi 3.5 L-type gold plated stereo mini- plug
Mass: 10g

Accessories

Carrying case, ear pieces (S, M and L)

RudiStor RPX-33, EV-08 Class A, DualMono Single Ended
Headphone Amplifier

Dual mono topology, showing a mixture of pure audiophile, clean, and optimized electronics, to deliver the finest sound available. The electronic design precisely calculated and very clean implemented, ensure the shortest signal path, a must in the real audiophile world. The power supply using capacitance multiplier, deliver the pure DC for that pure sound and black background.

High transparency, real life soundstage, deep and full bass and refined mid-highs, with astonishing dynamics, and absolutely crystal clear sound.

Versatility is a must in modern life, so in order to better enjoy this great amplifier, two headphones output jacks were provided, one for hi-sensitivity with lower power (L), and other for low-sensitivity cans, with higher output (H)To ensure a top notch performance, the components are selected from best brands available to us, followed by an accurate and solid construction and very strict tests in high qualified labs. All the components (including cables and wires) are certified to fully match the European Community safety regulations.

Clean and stylish design in slim aluminum case only 60 mm high

Clean design, very solid accurate construction, very long tests and tuning, to give to the audiophile world the greatest pleasure! Amplification works always Class A, with a very high damping factor, that gives the RPX-33 the highest control over any kind of transducer. The RPX33 is a very fast solid state amplifier with a great punch, but with a natural and warm sound due to the accurate study of harmonics pattern, and the use of single ended topology.

EV-08 version introduce some improvement in the power supply a new custom potentiometer and a redisigned mainboard.

Maximum Output: 700mW
Output Impedance: 16 - 600 Ohm
Bandwidth: 1-100.000 Hz < 0.5db
Gain: 12 db
THD: 0.02% (3Vpp on 32Ohm)
Technology: FET & Bipolar Transistors
Input Ipmedance: 47 Kohm Amplification
Class: Always A-Class
Input / Output: 1 x line
Dimensions (cm): 350 *60*282 mm
Output: For two headphones
Weight (Kg): 6 kg

 

RudiStor NX-03, Class A Headphone Amplifier

Dr. Rudi Stor, CEO at Audio Research      Alliance LLC, founder and Designer at    RudiStor Sound Systems Ltd.

NX-03 is a total new design. An extraordinary performer although simple amplification unit, encased in a fascinating hi-end box. An exercise of technology and design, to give to the audiophile the best sound and the pleasure to own a piece of artwork.

The sound quality and performance is absolute, this amplifier can drive any headphone from 4 to 1000 Ohm. The Distortion (Linear, Harmonic and Intermodulation) is so low, at any the frequency and level, that it is even very hard to measure!

The amp is completely linear from DC to 100KHz, and the damping factor is so high that this amp can easily drive small speakers. No capacitors are used on the signal path; no global negative feedback is used.

The amplifier use OPAmps as signal amplifiers and bias voltage servo actuator, in a simple but effective circuitry, with very short signal path, and usage of few selected components.

The current output devices are Darlington Bipolar transistor assisted by a solid state constant current generator.

NX-03 is extraordinary fast, this added to the high dynamics and overall power, generate a sensational punch feeling. The neutral sound, deep-end controlled bass, and the transparent highs, is the best way to describe the sound of this small great amplifier.

The amplifier is totally dead silent; noise floor is reduced down to -113 dB, so it is the right choice for SACD, given the superior dynamic range.

RudiStor RPX5.3 Tridens, Hi-End Headphone Amplifier
Vacuum Tubes input, Solid State Current Output

Tridens ( Trident in ancient Latin) circutry is a very low noise input stage using three triode section for each channel

The best RP5 of ever

The input stage of RP5.3 uses three double triodes, while the output is a SS pure Class-A bipolar power transistors high current unit. This hybrid technology make possible to have a direct output without using a transformer, and this way offer all the natural sound produced by the input tube stage without the slow sound, typical of the classic OTL tube amplifiers, we call this technology "enhanced output transformer less" E-OTL. In the RP5.3 the best of the tubes, work together with the best of the transistors worlds

RP5.3 is a highly musical amplifier, the tube input stage give to the sound the warmth of tubes without any artificial color, and the high current output can perfectly handle headphones of any impedance. 

The frequency response is almost flat from 2Hz ~ 50KHz (< 1db). The amp is cased in a heavy aluminum box. Wiring is made using only silver cables. The harmonic distortion is reduced to a mere 0.2% at normal listening levels. The IMD (Intermodulation distortion) is completely negligible.

The RP5.3 “Tridens” use a "capacitance multiplier" power supply and an oversized power transformer in order to assure the right amount of clean current to the audio section.

Heed Audio CanAmp Headphone Amplifier

Photo courtesty of Mike Grierson

Hifimaailman testivoitto 3/2008 Heed CanAmpille!
Testikuuntelija antoi ennen näkemättömän 10- arvosanan.

Palaute asiakkaaltamme, joka hankki Heed CanAmp 
vahvistimen ja Musical Blue välikaapelit:

"Täytyy tässä välissä heittää kiitokset sinne päin, jopa tuli mahtava combo postissa! Luurit ovat pysyneet aika hyvin liimattuna päähän koko viikonlopun ;)

Lähettämäsi välikaapelit ovat erittäin mehukkaan kuuloiset ja todellakin nimensä mukaiset.

Kiitos ja kumarrus!

Many audiophiles use headphones to enjoy their system. While some people are compelled to do so by their living circumstances, others simply prefer cans to loudspeakers. However, some amplifiers either have no headphone output, just as they don't have phone stages, or if they do have one, it is often just a simple IC-based stage. Regrettably, even many outboard amplifiers resort to this simple - and cheap - solution, making it impossible for headphones to perform at their best. Let us introduce the CanAmp, offering a no-compromise solution at a realistic price - in fact, given its technology and manufacturing quality we might even say at a "discount" price.

Headphones can be considered as high quality loudspeakers, but with a much lower power requirement. For this reason, they have distortion levels an order of magnitude lower than conventional speakers, and therefore are capable of showing up amplifier deficiencies more clearly. What's more, headphones are one-way systems, with very few exceptions, and for this reason crossovers do not interfere with sound quality. Consequently, a headphone amplifier must offer the best possible sound quality, even at very low volume levels, whilst working not unlike a real power amplifier.

The CanAmp is a two-stage amplifier. While the first - voltage gain - stage is based on an integrated circuit of the highest audio pedigree, the second - power gain - stage is a single-ended, pure Class-A amplifier. It enables the CanAmp to drive virtually any headphones from 8 ohms up to 600 ohms. As its output power (at 8 ohm) is nearly 1W, the CanAmp could drive even a high-sensitivity loudspeaker!

The unit has no internal wiring, and the signal path is kept to a minimum on its PCB.

Its high-quality, 1 dB-tolerance Blue Alps volume pot goes through a further selection process during manufacturing to achieve an even tighter, 0.5 dB tolerance.

The CanAmp not only has a line-level input but offers a line-level output to boot; it can therefore be connected to the TAPE MONITOR output of an amplifier, leaving the TAPE output free for additional components (MP3, MiniDisc, CDR, etc.). Gold-plated RCA terminals are used, and soldered directly onto the fibreglass PCB.

Graham Slee Solo Intro
Graham Slee Solo Monitor Class 
Headphone Amplifier

• Wide Power Bandwidth

• Tape Loop Compatibility

• Short Circuit Proof

• High Dynamic Range

• Low Noise and Distortion

• High Slew Rate

• Deep Detailed Bass

• Excellent Drive Capability

             (Phones NOT included.)

TNT-Audio, September 2003  Online Review

"...if you're in the market for a great sounding headphone amp and don't want to drop the kilo-bucks needed for "the other guys" amp, I'd seriously consider the Graham Slee's Solo"

Rock Grotto, January 2004  Online Review

"Without a shadow of a doubt, the Solo is a very accomplished little amplifier"

What Hi-Fi? Sound & Vision, 5 stars, October 2004

"If you are serious about headphones go and have a listen to the Solo - and be prepared to buy it there and then"

What Hi-Fi? Sound & Vision, 5 stars, Ultimate Guide, Autumn 2004

"This unassuming little box delivers a double-whammy of breathtaking resolution and gripping dynamics"

Graham Slee Voyager
Portable Headphone Amplifier

Features
Fully portable headphone amplifier - long battery life
Powerful sound
Pod player size match
Lightweight - 180 gram (6.5 ounce)
Street 'phones contour-boost switch
USB powered for office desk top
AC adapter for home amp use
Drives Hi-Fi and Studio headphones

Features explained

The powerful sound from the Voyager portable headphone amplifier gives an average (noticeable) 10dB boost in sound pressure level above that of most portable players. The Voyager portable headphone amplifier's fast wideband circuit assures all the sound quality of the source is delivered to the headphones, even when used with high performance sources up to studio standards.

It is fully portable, powered by its own replaceable standard issue 9 volt (MN1604; 6LR61) battery (supplied installed). If left playing into headphones from a continuously looping music source, the battery can last 50 hours or longer. Usually however, battery life will last a number of weeks if the power switch is set to its other positions when not in use, or when being powered by USB connection or by its AC adapter. It does not recharge the battery - a rechargeable 9 volt battery does not have the capacity of a disposable 9 volt battery.

A number of pod type players will sit comfortably on top of the Voyager.

The Voyager is light weight, similar to that of a "classic" pod player.

The street-wear contour switch is designed to improve the tonal range of street-wear headphones. For use from domestic and studio players using Hi-Fi or studio headphones, the "flat" position may be found more appropriate.

The Voyager can be used in the office taking its input from line-out sources like the 3,5mm jack on many computers. While in use at the desk top, it can be powered by a spare USB cord having a mini AB plug.

The Voyager is supplied with an AC adapter that can power it when used at home or in the office

Hi-Fi and studio quality stereo headphones can be used with the Voyager. When using high impedance headphones at home (typically 300 Ohm types and above), it is best used with high output line-level sources like a CD player, amplifier line/tape out, or the output of a phono preamplifier, if required to reach high volumes. A 3,5 to 6,3mm jack plug adapter may be required for some Hi-Fi or studio headphones. A stereo phono to 3,5mm jack plug, or DIN to 3,5mm jack plug cable may also be required depending on your home equipment. It will not drive electrostatic headphones.
Headphones of 16 - 600 Ohms impedance can be used.

Grado RA-1

After years of relying on other equipment to drive Grado headphones, you can now listen and enjoy headphones through our new Grado Reference Headphone Amp, the RA1. Designed for state-of-the-art performance and specifically to play Grados, the new RA1 will allow you to hear your headphones like never before. This new amp is machined from a solid block of mahogany and measures 5" wide, 5 1/2" deep and 1 1/2" tall and weighs in at 12 oz. The RA1 is available in an AC version or can be powered by two 9-Volt batteries that will drive the amp for 40 to 50 hours of listening pleasure. And the sound? Just like all Grados: warm, smooth, full-bodied, non-fatiguing and rich. Hook it up to any line source (portable or in-home) and drive your Grado headphones to their full potential.



Now Available the RA1-HG (High Gain). Now headphone enthusiasts can utilize the RA1's sonic qualities with a wide selection of headphones. The RA1-HG is designed to drive headphones with impedances of 100 ohms or more

"The RA1 offers excellent value for money, and does a fine job powering phones from Sennheiser, Shure and Ultimate Ears. It does especially well with Grado ‘phones and does not embarrass itself next to state of the art components."
- Phil Gold / Inner Ear Magazine

"When paired with the high-quality RS1 headphones, the RA1 delivers music that is clearer and more life-like than most speakers."
- Jason Alexander, Satellite Direct

"With the Grado Reference RA1 handling the amplification, music was rendered truer, clearer, and more life-like than I had ever imagined was possible."
- Willie Gluckstern, Audio Magazine.

Rega EAR

The new Ear Headphone Amplifier benefits from an all new extruded aluminium case and new styling giving it more of a family feel to match its illustrious big brothers. The Ear simply connects to the tape output of an amplifier via phono leads, the headphones are plugged into the front panel and there is a link socket incase you need your tape output sockets for other use. The new Ear is also available in our new alloy finish.

Height 50mm 
Width 182mm 
Depth 160mm 
Maximum output level into 32W load = 525 mW 
Input sensitivity for maximum output into 32W = 331 mV 
Input level for 250 mW into 32W load = 230 mV 
Maximum output level into 600W load = 55 mW 
Input sensitivity for maximum output input 600W = 465mV 
Input impedance = 24KW 
Gain = 21.7dB 
Power requirements = 24V AC @ 240mA 
Frequency response = 20Hz to 35KHz - 1dB points 
Recommended minimum load (normal operating conditions) = 32W per channel.