Custom Made in The U.S.A. Professional Ear Gear

Customer Comments PCM 1794

Hello i am very satisfied with the sound.It has more detail and mid high sound and it is more 3d .

Text Box: For the price its amazing.

Text Box: It has a better sound than digidesign 192 hd recorder and kills the emu 1820m mastergrade sound device.
Cosmic-Jeromy Parra Musician, Producer, Songwriter The Netherlands

Don’t be fooled by its appearance, the Ross Martin Audio PCM1794 Digital to Analog Stereo Converter

Box is a high-end, hand assembled D/A converter not a mass-produced piece of junk electronics from


Using the optional coax cable provided by RM with the PCM1794, I connected the digital output from my

computer’s sound card to the coaxial digital input on the back of the PCM1794. (It also has an optical

digital input.) I connected a stereo patch cord from the outputs on the front of the PCM1794 to the AUX

input on my Yamaha Preamp and plugged the included 120V power converter into my surge protector.

When the ON/Off switch on the PCM1794 is switched to the ON position, the LED on the front of the

PCM1794 illuminates RED indicating power is on. The LED changes from RED to GREEN, when a

digital signal has been detected.

The LED is the only indication that the unit is on since the signal to noise ratio of the PCM1794 adds

absolutely no audible noise to the processed signal. RM claims that the SN ratio can only be measured

using special equipment and I would have to agree. The instructions clearly warn to turn the volume

down when switching inputs because a typical background hiss associated with other equipment is

absent here and there is no way to know how loud it might be when the signal returns. So be careful.

I proceeded to do an A-B comparison with my existing analog interface between the computer and the

stereo. It is very easy to tell which one is on with the music paused because of the difference in the

signal to noise ratio. The always-present hum is gone when listening to the PCM1794. That alone

makes the PCM1794 worth the price but this converter does so much more!

To further explain how impressed I am with the difference the PCM1794 makes to the total listening

experience, I have to digress here and mention another epiphany I had years ago concerning the

relationship between sound quality and another component in my sound system, speaker wires. How

could wire possibly make any difference in the quality of the sound? I received my first Monster Cables

as a gift and proceeded to conduct a similar A-B comparison. WOW what a difference! Who knew high

frequencies travel on the outside of the conductors and more strands have greater surface area resulting

in better high-frequency response, a more open sound, increasing the depth of the sound field and this

could produce a thee dimensional audio experience? I became a believer in Monster Cable that day.

Today I have experienced another quantum leap in the quality of the sound coming from my computer.

Who knew a digital converter could make such a difference in the quality of the sound.

The PCM1794, 24bit converter takes good sound and makes it fantastic sound! For example, listening to

cymbals, the reverberation time is sustained longer as the sound fades. The result is a more open sound

image. It’s as if the speakers have been moved farther apart. The difference is dramatic, not just the

highs but the low frequencies too. According to RM, with no capacitors in the output, the PCM1794 can

reproduce signals down to DC. The bass response from this converter is incredible! I thought my

subwoofer was working before but it never went this low. This is bass you can feel. Listening to

Chumbawamba’s Outsider from their Tubthumper CD, the intro and the song is so much fun. If you’re in

an apartment your neighbors will run into the halls fearing that an earthquake is taking place. It’s

probably not a bad idea to stand in a door way while playing this if your building’s structure is

questionable. Otherwise, enjoy the ride

After a week of listening to the PCM1794 at every opportunity, it has been a re-discovery of my entire

music collection. The CD’s that were not recorded well are obvious. The ones that are recorded well are

such a delight! It’s like the first time I really heard the recording. Incredible range, wide-open sound

image. The incredible silence between songs adds to the dynamic range. Vocal solos by Linda Ronstadt

are dramatic with her incredible range fully exposed using the PCM1794. We generally play music louder

because it sounds better. But the PCM1794 sounds good at any volume. There is no listening fatigue,

even at unreasonably high volumes. But the real discovery is how good the sound is at a normal volume.

The PCM1794 is like a loudness button for your entire collection. The bass, the highs and the voice all

are better when using the PCM1794 Digital to Analog Stereo Converter Box.

Thanks for taking my audio enjoyment to the next level!

Glenn Esser

Electrical Engineer (and Audio Enthusiast)

Kansas City, MO

“hello again, I have been doing some listening over the last few days, and i am very impressed, keep me posted on your dual mono design, . Also if any upgrades become available for the PCM 1794, thanks, Albert”  Buyer From Canada

Dual PCM 1794

“Hello, Ross. Finally I've received the Dual PCM 1794. So after unpacking I have wait  for couple of hours and after that plugged it in and started to listen to it. Now I'm running it over s/pdif, because I don't have that type of USB cable (I though that it will be in the package). Anyway, after first hour of listening Dual PCM1794 I was upset in cause of  absence of the bass in my Sennheiser HD 650,  but running this unit longer I found what I was missing after listening to Ayre qb 9.


Right now it sounds really good, and I know that after couple of days it will sounds much better (excellent). Can not wait to test it over USB.



 Thank You.


Best regards, Dzmitry.”  opps we forgot the usb cable.


Check Out His Excellent Speakers With Our Dual PCM1794 As His Converter.

“il miglior dac che possiate aquistare sotto i 1000€. veramente fantastico++++++

Hello Ross,
lright, I was afraid that the DAC was too open and detailed, cold .... but it is not 'I only listen to jazz, and it was a pleasant surprise ... the female voice is fantastic, natural, and never cold metallic .. a real HiEnd dac .. perhaps the best that I have mounted opamp give this sound natural? what is the secret of the dac


Buyer Italy

“Hi Ross

   Thank you so much for quick shipping.  This little Dac is amazing  right out of

box.......... job well done.

   This thing  kicks butt of much, much costlier high end Dacs ..............

and trust me I tried so many .

    Best Regards,

    Sergio B.” Buyer From Connecticut

“Great product and price. No noise. Perfect connection between Apple TV and amp”

Ebay Buyer

Hey Ross, I got it today! Plugged it up and WOW - it sounds really , really good! Nice and clear, crisp, deep and the detail is staggering to say the least. Nice work - THANKS ! - DL

Ebay buyer

“Hi Ross, 
there is a way to connect the DAC I've bought to Personal 
Computer using USB port connection? And if yes how is possible? 
(I ask 
to You  just for my personal information, not problems in any cases). 
It sounds very good! I'm happy to have bought your DAC, now I'd like to 
know if there are also other way to use it! 
Thanks a lot! 
Buyer Italy    He bought our USB to SPDIF Converter

Text Box: "Ross is a great professional. True end-product. Great satisfaction, highly recommended"

Text Box: Ebay Buyer Brazil

“Hi Ross,

I agree it does sound awesome. Such clarity between the different voices and I can "feel" the strings instead of simply listening. I can not thank you enough- Pandora sounds wonderful as well the Naxos internet library and yesterday I ripped some CD's to FLAC and wow! I don't know if I can since I didn't buy it on EBay but I'll  post my comments there if you would like. I can not believe the sound quality and its coming from my pc!


Thanks again,

Tom”  PCM1794 USB Buyer

“Dear Sir


Today, I received a DAC.

Clear sound, cute looks and excellent cost performance

Thank you for sending a great product.


Sincerely yours


Yuzuru”  Buyer Japan


It sounds spectacular. Each voice and instrument is distinct with a warm sound-stage, I truly cannot believe that such sound clarity can originate with my somewhat older model pc. I spent a few weeks researching DACs and USB converters on line, including Musical Fidelity, HRT Music Streamer, and Music Hall among others. I found the Ross Martin devices while googling the Burr Brown PCM 1794 and saw little difference between the DAC/USB converters selling at 3 to 5x's the price and Ross Martin's products and  decided to take the chance. . You can actually hear strings resonate .  .       .......               ...      Just plug and play as this DAC is instantly recognized by your pc and enjoy. The sound quality via the PCM1794 OPA1611   is a substantial improvement from my Kenwood CD player and Ross and company are great to deal with if you have any questions.

“great dac this thing here is awsome!!!! better than apogee !! try it

Buyer McHenry/Sony Records

“Hello all, 
 I ordered a custom made dual 1794 chip DAC from Ross Martin and couldn't be 
happier as the presentation is absolutely stunning in my rig. 
 Also, I was and am still stunned by the price/performance ratio of this unit as 
it hold it's own against my other high end DAC, which uses the same chips and 
cost 4 times more. 
 Moreover, I've been involved with high end audio quite some time and truly feel 
this DAC was my best for bang for the buck purchase ever and that's truly saying 
Thank you Ross and please keep up the good work, 
Paul Laudati of Clear Day Cables”
Buyer Clear Day Cables

“Sweet! It was worth the wait not to mention the great price! Thanks!

Ebay Buyer


hi ross, i recieved the dac on saturday in good order. thought you would like to know that it really made a big difference in my system. the soundstage is lower. the sound is much cleaner and detailed. thanks again, kelley  Customer OPKS


“AMAZING Dac!!! Compares with Lavry, Benchmark and Mytek.Transformed my Hifi! AAA”

Jonathan CT

From ebay sales

“Exceptionally nice eBay transaction, professionally packed - DAC works great! ++”

Buyer From Montana

“Excellent product, communication, shipping. Very pleased, thank you!”

Buyer St. Louis

"The dac is very good! I had to change my EQ setting. I knew your dac was very good with real value from the parts description. I researched TI's PCM1794A Audio Converter with other DACs costing $1000 plus. The board itself is not costly. However, they are used in hi-end dacs. Good clean power, high-end filtering caps, and tight tolerance resistors.

Thanks again for a great job on the dac."  Bob Buyer From MN

“Nice DAC. Custom available if you want it. Great to deal with.”

Grant Buyer From Canada

“fantastic sound,thanks.5 stars”  buyer Lithuania