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Acuhorn R2R & RATE

ACUHORN

HiFi audio designer & manufacturer


The latest special are the best High End digital DAC & AMP design is Acuhorn R2R + RATE granted the BEST PRODUCT 2017 High Fidelity award. Recently introduced the rare puristic design of "One Big Tube" tube amplifiers Acuhorn TT with input transformer and output transformer. OTL tube amplifiers series, specially Acuhorn S2, the best matched with high sensitivity speakers. Award Statement 2010 series of Mosfet single ended amplifiers in mono and stereo versions. At the beginning presented genuine solution high sensitivity single driver speakers, with highly recommended Acuhorn Nero125. Acuhorn founded in 2003.

Awards


Best Product 2017 High Fidelity R2R Hi-tech Streamer & DAC with Mark Red Fingerprint
Best Product 2017 High Fidelity RATE Class-d Amplifier with Mark Red Fingerprint
Award Statement 2010 High Fidelity mono3.5 Monoblock Amplifier Mosfet
Product of The Year 2007 High Fidelity Rosso Superiore175 Improved Audio Loudspeakers
Product of The Year 2004 High Fidelity Nero125 Loudspeakers

Acuhorn products history


2018 R2R H Headphone AMP DAC & DSD converter
2018 R2R XD balanced DAC & DSD converter
2018 R2R X balanced DAC & streamer
2017 R2R hi-tech streamer Award 2017 & Red Fingerprint
2017 RATE class-d amplifier Award 2017 & Red Fingerprint
2016 TT original tube amplifier
2016 15 bass speakers
2014 M4 monoblock tube amplifier otl
2014 M2 monoblock tube amplifier otl
2014 S2 stereo tube amplifier otl
2014 S1 stereo tube amplifier otl
2013 mono6 monoblock amplifier mosfet
2013 stereo3 stereo amplifier mosfet
2012 rosso superiore175 superleggera
2012 nero125 superleggera
2012 giovane85 superleggera
2010 mono3.5 monoblock amplifier mosfet Award 2010
2007 nero125 improved audio
2007 rosso superiore175 improved audio Award 2007
2006 rosso superiore175 classic
2005 grand biancore155 classic
2004 nero125 classic Award 2004
2004 rosso135 classic
2003 secco145 classic

previous websites links

2017-2018
2009-2016
2003-2008

PRODUCTS

11
High Sensitivity Speakers
5
Tube Amplifiers
5
Digital & Mosfet Amplifier
4
DAC & Streamers

PRODUCTS

The featured products


Acuhorn R2R H Headphone AMP DAC & DSD Converter
Acuhorn R2R XD Balanced DAC & DSD Converter
Acuhorn R2R DAC & Hi-tech Streamer Award 2017 & Red Fingerprint
Acuhorn RATE Class-d Amplifier Award 2017 & Red Fingerprint
Acuhorn TT Original Tube Amplifier
Acuhorn 15 Bass Speakers
Acuhorn Nero125 Single Driver Speakers
Acuhorn R2R H Headphone AMP DAC & DSD Converter
Acuhorn R2R H
€ 4000



black finish

Audiophile DAC & DSD Converter with Class-A Mosfet Headphone Amplifier

Acuhorn R2R H we built this city on solid state TPCA Toshiba superfast transistor with Award Statement in High Fidelity working single ended in pure class-A and digital to analog converter loaded FPGA Spartan 6 discrete R2R ladder with Award Best Product in High Fidelity to enjoy the sensations for direct stream digital DSD music. Compatible with all types of music file formats. For computer audiophile by USB audio or other audio device by optic SPDIF. State of the art powered by Vicor modules.

features
R2R ladder 28 bit resolution 384Khz dac by Soekris. Loaded FPGA Spartan 6 technology oversampling up to 3.072Mhz. Frequency range +0.1dB -1.0dB 20hz - 20Khz. Total harmonic distortion + noise <0.008%. Clock jitter RMS 0.8 pS typical. Resistors precision 28 bit 0.02% resistors. Signal to noise ratio 20 Khz bandwith 129 dB unweighted. Input SPDIF up to 24 bit 192 Khz. Input I2S PCM up to 24 bit 384 Khz. Input I2S DSD up to DoP128 and DSD256.

Automatic input selection of USB audio device or optic SPDIF. R-2R direct single ended output: 1.4V RMS Zout 640 ohm for high impedance input transformer or input tube amplifier. Buffered single ended output: 1.4V RMS Zout 10 ohm for any input amplifier or headphones.

Digital input USB Type B audio adapter Amanero combo384 compatible with Mac OSX®, Linux and Microsoft Windows®. Digital input optical Toslink. All analog outputs are with volume control: 2x stereo RCA outputs: R-2R direct and buffered and 2x headphone outputs: 3.5mm and 6.3mm.

Pure class-A Mosfet headphone single ended amplifier. Solid state TPCA Toshiba transistor. 2x thick film resistors SMD 3521 1% per channel. Separate dual mono power supply.

Power supply is the best Vicorpower modules. DC-DC converters provide high power density and low noise High frequency Mhz switching. Advanced power processing in a small size. Autoranging 90-264Vac network voltage, for worldwide use.

technical specifications
input voltage mains autoranging 90-264Vac
maximum input power 35W
discrete R-2R sign magnitude DAC type
stepped attenuator volume control
2 signal input I2S by USB and SPDIF Toslink
2 audio output R-2R direct and buffered
2 headphone output 3.5mm and 6.3mm
internal cable OCC copper
terminal rhodium
weight 1,6kg
dimensions W 320 x D 200 x H 28mm

Acuhorn R2R XD Balanced DAC & DSD Converter
Acuhorn R2R XD
€ 4600



silver finish

Fully Balanced Configuration DAC & DSD Converter

Acuhorn R2R XD the board doubled for DAC in the fully balanced configuration. A device with an outstanding power supply, separate for each unit. The Superfast and low noise Vicor modules DC-DC converters. The device is enriched with Amanero DSD converter for a real listening session with the 1-bit music stream. I invite here the best source of Hi-Res sound high quality.

features
R2R ladder 28 bit resolution 384Khz dac by Soekris. Loaded FPGA Spartan 6 technology oversampling up to 3.072Mhz. Frequency range +0.1dB -1.0dB 20hz - 20Khz. Total harmonic distortion + noise <0.008%. Clock jitter RMS 0.8 pS typical. Resistors precision 28 bit 0.02% resistors. Signal to noise ratio 20 Khz bandwith 129 dB unweighted. Input SPDIF up to 24 bit 192 Khz. Input I2S PCM up to 24 bit 384 Khz. Input I2S DSD up to DoP128 and DSD256.

Automatic input selection USB audio device or SPDIF. Manual switching between SPDIF coax, Toslink and off. R-2R direct single ended output 1.4V RMS and balanced 2.8V RMS Zout 640 ohm. Output line is for high impedance input only.

Digital input USB Type B audio adapter Amanero combo384 compatible for Mac OSX®, Linux and Microsoft Windows®. Digital input SPDIF coax, optical. Output line stereo R-2R direct balanced and RCA.

Power supply is the best Vicorpower modules. DC-DC converters provide high power density and low noise High frequency Mhz switching. Advanced power processing in a small size. Autoranging 90-264Vac network voltage, for worldwide use.

technical specifications
input voltage mains autoranging 90-264Vac
maximum input power 30W
2x discrete R-2R sign magnitude DAC type
fully balanced construction
3 signal input I2S by USB and SPDIF Coax, Toslink
2 audio output R-2R direct balanced and RCA
internal cable OCC copper
terminal rhodium
weight 1,6kg
dimensions W 320 x D 200 x H 28mm

Acuhorn DAC & R2R Hi-tech Streamer
Acuhorn R2R
€ 3600



black silver

Stereo Streamer and DAC Loaded FPGA Spartan 6 R2R Ladder

Acuhorn R2R, a tiny modern design that twins with the RATE amplifier. Just to get closer to the recovery of music playing as it was at the beginning. Today there is no better way for digital to analogue converter than to load to the programmable logic with as much computing power. To split the signal into millions of particles and unload onto a discrete ladder of analog resistors. It's like a stylus diamond traveling through a vinyl groove.

features
R2R ladder 28 bit resolution 384Khz dac by famous Soekris. Loaded FPGA Spartan 6 technology oversampling up to 3.072Mhz. Frequency range +0.1dB -1.0dB 20hz - 20Khz. Total harmonic distortion + noise <0.015%. Ssignal to noise ratio 127dB A weighted. Automatic input selection I2S or SPDIF. R-2R direct single ended output: 1.4V RMS Zout 625ohm. for high impedance input transformer or input tube amplifier. Buffered single ended output: 2V RMS Zout 10ohm for any input amplifier or headphones >300ohm by adapter cable.

Server runs on Raspberry Pi of single board computers. Low Latency and Real-Time Audio kernels. DXD PCM 384Khz and support DoP for DSD128 to 192KHz output via I2S interface. Compatible with all formats music: MP3, FLAC, WAV, AAC, ALAC, DSD. UPNP\DLNA, Airplay, TIDAL, Qobuz, Spotify, Google Play, Squeezelite and Web-Radios, etc. Controlled wifi from remote running on smartphones, tablets, notebooks. For control playback and settings use any audiophile music player for RPi.

Power supply is the best Vicorpower modules. DC-DC converters provide high power density and low noise High frequency Mhz switching. Advanced power processing in a small size. Autoranging 90-264Vac network voltage, for worldwide use.

technical specifications
input voltage mains autoranging 90-264Vac
maximum input power 20W
discrete R-2R sign magnitude DAC type
digital volume control
3 signal input I2S by RPi, SPDIF Coax and Toslink
2 audio output R-2R direct and buffered
internal cable OCC copper
terminal rhodium
weight 1,5kg
dimensions W 320 x D 200 x H 28mm


links
Acuhorn R2R + RATE review highfidelity
Acuhorn R2R manual
Acuhorn RATE Class-d Amplifier
Acuhorn RATE
€ 2500



black silver

The World's High End Monolithic Stereo Amplifier

Acuhorn RATE. I have the pleasure to present a truly audiophile solution to the modern amplifier design. The world's highest performing, high-power, monolithic class-D stereo amplifier chip by Texas Instruments. Working together with the power supply that is the latest development of the best Vicorpower. Analog input by Lundahl high impedance transformers and Welwyn Nichrome thin film resistors SMD are used for volume control. Eco-friendly, the best efficiency of the amplifier on the market. Here is the amplifier with performance better than ever before.

features
Monolithic class-d stereo amplifier chip by texas instruments. The integrated solution can offer a reduction in size. Reliability only a few components on the board. The audiophile selection of each component is a listening session.

Advanced PurePath Ultra-HD technology. Up to 90% efficient with 60 micro ohm MOSFETs. Audio bandwidth 100KHz. Total harmonic distortion + noise <0.005%. Output noise, A-weighted <60uV. Signal to noise ratio >111dB (A weighted). Dynamic range 115dB. Protection of both amplifier and speakers.

Stepped attenuators are the most preferred solution in high end audio. High quality precision 0.1% thin film Nichrome chip resistors. Subsonic bass, low bass and bass are the best with this type of resistors. Outstanding sound clarity, precise signal and soundstage.

Lundahl transformers is a world leading of high performance audio. The amplifier input is isolated high impedance input transformer. Specially selected for work with direct output from the R2R dac ladder. Extreme audio path high quality and transparent sounding.

Power supply is the best Vicorpower modules. DC-DC converters provide high power density and low noise high frequency Mhz switching. Advanced power processing in a small size. Autoranging 90-264Vac network voltage, for worldwide use.

technical specifications
input voltage mains autoranging 90-264Vac
maximum input power 340W
monolithic class D amplifier type
stepped attenuator volume control
line high impedance input transformer
input sensitivity 2V
output power 2x150W
internal cable OCC copper
terminal rhodium
weight 1,8kg
dimensions W 320 x D 200 x H 28mm


links
Acuhorn R2R + RATE review highfidelity
Acuhorn RATE manual
Acuhorn TT Original Tube Amplifier
Acuhorn TT
€ 4800



one unit two units
black silver

The Absolute Sound Tube Amplifier

Acuhorn TT original tube amplifier, if you want to experience the sound of one huge tube. A supply power with ultra state of the art DC-DC converters working at mega speed. The idea origins are like in the first amplifiers Western Electric. The amplifier is classical output transformer and applies grid input transformers similar to UTC LS-10. Here is only one serviceable element, the single ended SE 6C33C triode, to be exchanged.

features
the sound of one huge tube 6C33C without small driver tube. One tube amplifier type with input and output transformer. Self-biasing amplifier without adjustment of the tubes. Only one 6c33c tube is serviceable part to be exchanged. Design amplifier the highest level of Amperes work in class-A. Plate current 400 mA 3000 h reliability. Plate dissipation 60W. Plate voltage 200V. Internal resistance RP 80. Warm-up time to 90% emission 120 s.

Line to grid transformer similar to the UTC LS-10. Designed for multiple input sensitivity. Direct input to the grid with preamplifier. For 600 ohm sources at input sensitivity 6V. For 50 ohm sources at input sensitivity 2V. Optional four sections input transformer for match volume control. Absolutely minimalist audio path. High quality precision 0.1% thin film Nichrome chip resistors. The amplifier has a mono mode switch. For mono connect the speakers to the output in series or parallel.

Power supply is the best Vicorpower modules. DC-DC converters provide high power density and low noise High frequency Mhz switching. Advanced power processing in a small size. Autoranging 90-264Vac network voltage, for worldwide use.

technical specifications
input voltage mains autoranging 90-264Vac
maximum input power 280W
one tube amplifier type
single ended SE 6C33C triode in class A
input and output transformer
input sensitivity 2V
output power tube 2x6W (mono mode 12W)
output impedance 4 ohm and 8 ohm
internal cable occ copper
terminal rhodium
weight 11 kg piece
dimensions W85 D320 H280 mm


links
acuhorn TT manual
Acuhorn 15 Bass Speakers
Acuhorn 15
€ 2990



cherry veneer finish

High Sensitivity Stereo Floorstanding Loudspeakers

Acuhorn 15 Super bass deep and very natural in acoustic music. Amazing soundstage, huge and picturesque. Beautiful deep vocals with extraordinary sensitivity. Sound reproduction in the piano recordings is very accurate and precise. Speakers can play with a very powerful sound. It is the authoritative message, I feel that it should sound just like that.

features
15 inch bass speaker diaphragm surface area 800cm2 comparable to four pieces of 8 inch speakers. Motor system powered by neodymium magnets. Voice coil diameter 77 mm (3 in) with copper winding material all the best is indeed.

Isodynamic Ribbon Tweeter has driving force distributed evenly over the whole area. The driver has linear phase response and impedance in the audio frequency range. Diaphragm is almost weightless has provides an immediate and precise response to any transients in the original signal. With this tweeter there is no need to manipulate parts for correcting the crossover filter. It gives you a difference.

Performance advantage filter type first order crossover. Listening sessions to use precisely model high and low pass. All crossover parts are made by the Mundorf company. Pure design without resistors in the audio path.

Superb stiffened and acoustically balanced housing. Wooden good sound construction of lightweight materials. Natural wood veneer finish of enclosure. Flat loudspeakers very good for positioning in the room.

technical specifications
one acoustic chamber bassreflex
HF Driver HiVi neodymium
LF Driver FaitalPRO neodymium
first order crossover 1kHz
impedance 8 ohm
sensitivity 96 dB
weight 25 kg piece
dimensions D24 W57 H105 cm


links
Acuhorn 15 review highfidelity
Acuhorn 15 review hifiknights
Acuhorn 15 manual
Acuhorn Nero125 Single Driver Speakers
Acuhorn Nero125
€ 1290



cherry veneer finish

The Best Back Loaded Horn Loudspeaker

Acuhorn nero125 is the high fidelity cutting edge gear. This acoustic genuine solution was launched in 2004 with the Award of the Year in High Fidelity. It now includes the latest superleggera line. This purposefully light driver has no body at all. It is suspended between a wooden enclosure and a neodymiun engine. Lightweight wood materials are used to build it. The best review in the audio magazine Enjoy The Music Superior Audio. Have a taste of that bestseller featuring much positive feedback.

features
Acuhorn genuine solution of sound processing. Breaking an acoustic wave at a golden ratio between the segments of a source of signal and a gap and a horn mouth. High sensitivity gives connect to each one single ended triode amplifier. Speaker equipped with a hi-tech acuhorn drivers superleggera. Wooden good sound construction of lightweight materials. Natural wood veneer finish of enclosure.

Superleggera is wonderful ideas to create sound. As in the famous violin acoustic instruments. Suspending the driver of speaker between the wood. As in the case of violin, her soundpost and bassbar. Effect, both sound smooth and detailed.

Light driver has no body at all. New neodymium magnet with very thick stream. Pure paper light membrane 4gr. Precision cut armco iron engine profile. Air gap streaming jump 1,0 mm. Voice coil thin wire diameter 180 micron.

technical specifications
two acoustic chambers type + big horn
wooden enclosure lightweight materials
one driver acuhorn type superleggera
neodymium engine precision cut profile
impedance 4 ohm (compatible 8 ohm)
sensitivity 96 dB
internal cable occ copper
terminal rhodium
weight 15 kg piece
dimensions W20 D47 H120 cm


links
Acuhorn superleggera
Acuhorn superleggera giovane85 review highfidelity
Acuhorn nero125 concept design
Acuhorn nero125 manual
Acuhorn nero125 review Enjoy The Music

STORE

Click on the bottom to make order

international free shipping,
ready to send immediately, delivery 3-5 days by courier to your door,
general conditions 14 days refund, buyer pays return postage,
available payment methods

Acuhorn 15
cherry veener finish
€ 2990

Acuhorn nero125
cherry veener finish
€ 1290

Acuhorn giovane85
cherry veener finish
€ 890

Acuhorn stereo3
silver finish
€ 890

Acuhorn TT
silver finish
€ 9600

Acuhorn TT
black finish
€ 9600

Acuhorn TT
silver finish
€ 4800

Acuhorn TT
black finish
€ 4800

Acuhorn R2R
silver finish
€ 3600

Acuhorn R2R
black finish
€ 3600

Acuhorn RATE
silver finish
€ 2500

Acuhorn RATE
black finish
€ 2500

Acuhorn R2R XD
silver finish
€ 4600

Acuhorn R2R H
black finish
€ 4000

CONTACT

CONTACT

Get in touch


Wojciech Unterschuetz
Kartuska 243A
Gdansk 80-125
Poland

Phone +48 737476346
email info@acuhorn.pl

Acuhorn ebay store

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