Customer Feedbacks
Burson Discrete Opamp in Mhzs 66 / 88 CDP 
I played the CD almost for five hours and still running good. And after breaking in the CD and your op amp thesound is getting better by the minute. (For more details on this MOD click here) Grzegorz USA The tda 1540 has the most natural and realistic sound of all the dacs (IMHO) that I have played around with and inside the revox b225 it is a killer. In my home set up it easily outshines marantz cd94, audionote dac 3.1 balanced,micromega duo, meridian 207, chord dac64, grundig cd9009, sony sacd777 etc etc. My speakers are as relaistic as it gets stacked quad 57's + raven tweeter. Your op amp, released even more of its potential and I was very taken back by the degree of the increased sense of realism/presence it brought out. I had thought I had reached the maximum potential that was possible by upgrading its power supply and all dac coupling caps. Luke UK Burson Discrete Opamp in Audyn Pre-6 I have already installed 1 pair in my pre-amp, the sound is excellent. As you described on your site, I now removed the X10D form musical fidelity. For a photo you can look on my site www.ruvox.nl button PRE-6 met HDAM’s
Burson Discrete Opamp in Shangling CDT80 ..."Just installed your opamp upgrade and I am more than impressed with the incrase in fidelity that is completely out of prop portion to the money I paid. Thank you for turning my midprice Shanling CDT80 player into a giant killer that now kicks serious ass. Finally makes my digital sound like a real acoustic event rather than a digital artifact. Excellent upgrade that has THE BEST price to performance ratio I have ever experienced. Every aspect has been improved, detail, resolution, naturalness of sound, dynamics and smooth as. I will put you on my short list of highest recommendation to anyone who wants to upgrade their CD player. May the force be with you and please don't ever stop doing what you do"... Mark Sydney Burson Discrete opamp in Shanling CDA10T  
Very great job with your HDAM module. Some pictures here: http://diy-audio.myphotos.cc/Shanling%20CDA10T/index.html (hosted on my home PC, not 100% available as I turn it off before going to sleep...).
P.WEIBEL France
Burson Discrete Opamp in Denon CDP  
"...
You can also see the Burson Op Amp replacements using discrete transistors is in the full photo from phase one.
After a quick listen on headphones, it sounds very niece. I will be doing more listening this weekend.
Patrick Australia Burson Discrete Opamp in Zhaolu 2.5 DAC  
"I installed the burson op amps in my Zhaolu 2.5 dac. Still in burning in period, but the sound is already really better. Much space, much definition, more precise bass...." Denis France Burson Discrete Opamp in Cayin CDT 17A  
"I have recieved my Op-Amps, and the sound is noe more less than stunning!! I just sat in my chair and smiled through 7 CD`s today, this is one of my best updates ever! I can discribe the sound like this: Much darker background, extreme dynamic, better placement between vocal and instruments, the vocal is dead center between the speakers, wonderful analog sound! They are just simply the best Op-Amps there is to find! I am stunned!..." Ole Norway Burson Discrete Op-amp in ASR Intergraded Amp   ..."I have finally modified one Discrete Op-amp module (/from a dual setup to two singles/), not difficult but still take 1 hour to do the modification.I use this Discrete Op-amp module on my German made ASR Integrated Amplifier, see the diagram.
ASR web site, http://www.manger-audio.co.uk/amplifiers-asr-emitter1.htm
Yes, sure your Discrete Op-amp module is better than OPA627, hearable improvement. Congrulation, you've done a great job for us poor audiophiles"... Alex Hong Kong Burson Discrete Op-Amp in Maratnz CD 72  
..."Burson Clock and full set of Burson Modules installed in a Marantz CD72. Amazing result!!"... Mark B Australia BursonAudio Discrete Opamp + Clock in NAD 521i 
Pack just arrived on Friday, I installed Burson clock and in a NAD 521i CD player. The first improvement was using NAD as transport, I own an AUDIOSINTHESYS DAX DAC wich is very sensitive to transport, before installing clock de dac wasn´t able to lock with the nad as transport and some cracks and pops were heard, after installing the clock the dac locked perfect. Using HDAM was a big improvement using NAD as a standalone player, I think this player is not good enough to hear the benefits of Discrete Op-amp. My Audiosynthesis DAX is better than the moded NAD, but this mod made them closer, Discrete Op-amp was better than OPA627.
I´m sending you some pics of the modified nad, Discrete Op-amp Sclock, ELNA audio caps for analog ps, nichicon muse output caps.You can se in the pic the installation points for clock (signal orange and ground orange-white) I´m also sending you a pic form my system and a pic of my loved Harman Kardon citation II.If you want to know more please let me know.
Best regards. Oscar Mexico
Thanks for your help below, they are now fully burned in and sound really impressive. I have been trying different op amps for some time and had settled on BurrBrown OPA 627/637 combination but the Discrete Op-amps just blow these out of the water! They sound in a different league. Probably the best thing is the texture, but overall every aspect of the sound is improved. Allan R UK "The amps arrived yesterday and I installed them today. They are beautiful! You really have a great design. They worked without any problems and sounded wonderful the first moment I turned them on. The difference between your amps and the OPA627 is not something you have to push your senses to hear - it is a huge difference in audio terms. There is an easy, but well-defined character which is just addictive..." Bob F Burson Discrete Opamp in TEAC Esoteric. 
..."Also I am sending you some pictures of a modified TEAC esoteric. They completely transformed this $5000 USD player. Music has much more body, sound is more analytical. Stereo image was much better, my speakers almost disappeared, never heard details were present, mod also included black gate non polarized caps"... Oscar Mexico BursonAudio Discrete Opamp in Sony SCD777ES 
..."The HDAM is really well, mainly because the GAIN is louder. Secondly, the sound quality is very natural. I used a thicker silver plated wire this time, the bass turned out excellent. When I listen to a music piece that involves the violin, it sounds flawless as well; pretty much, the sound that my stereo is producing has no trace of any digital sound quality- it is very musical." ...
T.C.Yao USA BursonAudio Discrete Op-amp in Arcam 9  
Burson Discrete Opamp in Cayin CDT-17  
"... I receive the 2 Opamp yesterday.
I fix it last night in my Cayin Cdt17, and today I listen all afternoon. They sound very good, much better than my OPA627bp, so great deal !!!
But I need one pair more for a friend (also in Spain)..."
Christophe Spain Burson Discrete Opamp in Musical Fidelity X-DAC V3  
Pekka Immonen from Finland has kindly shared his X-DAC V3 modification project with the rest of the world. If you have a X-DAC V3 his web page is not to be missed.( http://modhifi.blogspot.com/ ) We love all the caps replacement and blue tag dampings. Great job Pekka :) Pekka Finland Burson Discrete Opamp in Hi-End DIY DAC 
George from France has installed our discrete opamp into his beautifully built DIY DAC with great result. Here is what he said about our discrete opamp..." I've just receive the AOP yesterday and plug them into my DIY DAC. This is simply incredible !!!..." http://www.homecinema-fr.com/forum/viewtopic.php?p=170444455#170444455 George France Burson Discrete Opamp in NAD 542 CD player 
My knowledge in electronic is minimal although I am listening to music for more than two decades. I changed many systems and recently was informed about Burson by Tony from Holland. I decided to change HDAM and the clock. Without help from two kind people Oscar-Mexico and Manfred-Deutschland probably this project would be unsuccessful.
Firstly I changed hdam which was very easy process. I was surprised how good hdams are. Speakers disappeared, sound become analog, especially cymbals. Space opened in all directions as well.
Than I ordered the clock. To understand installation process took me some time however after that it was again very easy. You can notice that in between pin1 U507 and the clock's power supply is placed R22ohm as kindly recommended by Manfred.
The rest as Burson's page advising. Sound, improved again, noticeably cymbals and bass too. The only think I disliked was that space constricted slightly with the clock. Mirza WA Australia | 
Although our Bursonaudio Discrete Op-amp is inspired by branded HDAMs such as Marantz, Musical Fidelity and Mark Levinson, our Discrete Op-amp is not a direct clone of anyone. We have altered/improved the module based on our musical preference and it is the only Discrete Op-amp in the world that can directly replace existing op-amps without the need to modify a machines’ circuitry. 
