TDSS Upgrade Reviews
"The sense of realism is now through the roof. The sense of space and added transparency leave me in awe. I am discovering information in the music I know very well that I never heard before."
TDSS D.R.R.T. Upgrade of Benchmark AHB-2 by Roger K.
Anyway, with your D.R.R.T. Upgrades you have taken what was a $1,600 amp that sounded like a $5,000 amp and turned it into one that sounds (to me with my admittedly limited experience with expensive amps) like a $12,000 amp!"
TDSS D.R.R.T. Upgrade of NuPrime ST-10 BY Paul W.
"Easily the best I've ever had in a system here, and not far from the best I've heard in high 6-figure systems."
TDSS D.R.R.T. Upgrade of NuPrime DAC-10 & ST-10 by John B.
"I just don't know of any $2500 amp that can touch this thing...really, it drove my Mythology M1's better than any amp I have had in house... which surprised me."
TDSS D.R.R.T. Upgrade of NuPrime ST-10 BY Well Pleased AV
"Overall, a definite improvement."
TDSS D.R.R.T. Upgrade of NuPrime ST-10 by John K.
"Its not some brutal change. Its a somewhat more of a subtle change that gives you a greater sense of the musicians performing in their own space.. and a certain smoothness that was not there before. A clarity. More like real music."
TDSS D.R.R.T. Upgrade of NuPrime ST-10 by Gene Z.
"I have made countless upgrades to my audio system before, and I have never had such an improvement for the money!"
TDSS D.R.R.T. Upgrade of NuPrime DAC-10 by Joe Y.
"... that's exactly the kind of change on which you want to spend your money in the high end."
TDSS D.R.R.T. Upgrade of NuPrime IDA-16 by Tom Davis
"A couple of audio industry professionals have listened to my system and seemed to be genuinely stunned."
TDSS D.R.R.T. Upgrade OF NuPrime IDA-16 by Paul H.
"I experienced so much more space and resolution with the better cables that I wonder just how many downstream upgrades would be needed before it became the limiting factor. It [IDA-8] now has a remarkable ease and openness to its presentation, while retaining all of the vibrant warmth and precision of the original design. I couldn't be happier!"
TDSS D.R.R.T. Upgrade OF NuPrime IDA-8 by Jeff C.
"I have never heard this kind of clarity and impact before while listening at lower volumes."
TDSS D.R.R.T. Upgrade of NuForce STA-100 by Gene Z.
"I am hearing unexpected things I never was able to hear before"
TDSS D.R.R.T. Upgrade of NuForce HAP-100 by Gene Z.
"I personally think that the modded 20's can complete at the $50,000 amp level and perhaps even be preferred by many whose minds and hearts are open to the music being the reason we engage in our quest."
TDSS D.R.R.T. Upgrade OF NuForce Ref-20 by Gammajo
"Between real tears and laughter, all I wanted to do was listen and let myself be absorbed by the music. Every note was suspended in the air, time slowed down, the extensions when Frank grabbed a high note were almost frightening in their dynamics, the textures of strings, drum skins, brass horns, you name it were all vividly real."
TDSS D.R.R.T. Upgrade of NuForce Ref-20 by Spence R.
"They're like a totally different amp altogether except they retain the original "sound" or sonic signature they always had - but better."
TDSS D.R.R.T. + Power Supply Upgrade of NuForce Ref-20 by Neil R.
"It's as if a subwoofer has been installed into the system! Not just more bass but clean, defined and more realistic toe tapping sound... Absolute non fatiguing sound."
TDSS D.R.R.T. + Power Supply Upgrade of NuForce Ref-20 by Chris K.
"Now that I got the upgrade, right out of the box they sound more relaxed and smooth, natural on the highs. The noise floor is non existant with my balanced cables."
TDSS D.R.R.T. Upgrade of NuForce Ref-18 by Brett Miller
"The TDSS upgrade has taken the incredible Nuforce amp to the next level. And I just cant believe I was missing so much in music, for so long."
TDSS D.R.R.T. Upgrade of NuForce IA-18 V3 by Michael H.
"He [Bob] turned them around inside of 2 weeks and all I can says is ... wow. My amps are quieter and more transparent than ever. The soundstage is perceptibly wider. Separation of instruments is more defined. Basically he turned what were excellent amps into phenomenal ones."
TDSS D.R.R.T. + Power Supply Upgrade of NuForce Ref-9 V3 SE by Jeff K.
"If you never believed modding makes much difference - think again. The amps now are an Incredible Value-Incredible sound. Detailed, lively sound with no fatigue at all. Midrange is surprisingly somewhat warm. No, not 300B tube warm - but clean and natural - very easy to listen to."
TDSS D.R.R.T. + Power Supply Upgrade of NuForce Ref-9 V3 SE Amplifier by Bob A.
... I now feel that my TDSS-enhanced Ref-9s are just as good as many Class A mono-block amps, many of which cost up to € 30,000 or more!... They are the best amplifiers I've ever owned ... and I've heard (almost) everything."
TDSS D.R.R.T. + Power Supply Upgrade of NuForce Ref-9 V3 SE Amplifier by Huseyin K.
"On first listen, the sound is now better in all aspects. Hearing many sounds I couldn't hear as well or at all previously."
TDSS D.R.R.T. + Power Supply Upgrade of NuForce Ref-9 V3 SE by Bob S. (Part-1)
"These amps are world class and I’ve now heard them in 4 different systems... RUN, don't walk, and talk to Bob Smith about his upgrade."
TDSS D.R.R.T. + Power Supply Upgrade of NuForce Ref-9 V3 SE Amplifier by Bob S. (Part-2)
"Bob - You're a GENIUS !!! I had my stereo on and within SECONDS I heard the difference... and it's only going to get more awesome by the hour."
TDSS D.R.R.T. + Power Supply Upgrade of NuForce Ref-9 V3 SE Amplifier by Bill F. (Part-1)
"I've been into Home Audio (2-channel) since 1985 and have owned a number of very good systems. My advice is that, if you are undecided as to having one of the TDSS Upgrades installed in your NuForce/NuPrime amps… you should go for it!!!"
TDSS D.R.R.T. + Power Supply Upgrade of NuForce Ref-9V3 SE BY Bill F. (Part-2)
WOW!!! Nothing but non stop TRUTH and BEAUTY !!! I really can’t describe the whole spectrum of audible improvements rendered by TDSS. I would advise anyone thinking of moving up to a world class amplifier and not wanting to spend a fortune, to check out the TDSS website and find out how to do just that!
TDSS D.R.R.T. + Power Supply Upgrade of NuForce Ref-9 V3 SE by Jim D.
"After listening to my amps for a month now I can testify that the difference is night and day. The Level-2 Upgrade made the high and low ranges beyond anything I could have imagined - WOW!"
TDSS D.R.R.T. Upgrade of NuForce Ref-9 V3 by Phil H.
"In short, they are wonderful!"
TDSS D.R.R.T. Upgrade of NuForce Ref-9 by Richard V. (Part-1)
"With the repaired & upgraded NuForce, my system is singing again, with better parameters all around: Better bass, better sound staging, much better tonal balance."
TDSS D.R.R.T. + Power Supply Upgrade of NuForce Ref-9 V3 SE Amp by Richard V. (Part-2)
"I have had the opportunity to listen to the revised NuForce Ref-9 amps and I like them a lot... It seems to me that their sound character remains the same but they sound is more robust, especially in their ability to control the big woofers on my Wilson Speakers."
TDSS D.R.R.T. Upgrade of NuForce Ref-9 V3 by Rune E.
"They definitely sound more open, transparent, authoritative & spacious. This is wonderful."
TDSS D.R.R.T. Upgrade of NuForce Ref-9V3 SE by Alvester G.
"... the Bass was improved and more detailed, the soundstage and images were more "alive", and the highs more "THERE" without any additional edge."
TDSS D.R.R.T. Upgrade of NuForce Ref-9V3 SE BY John Casler OF Summit AV
"The amps were sounding really good"
TDSS D.R.R.T. Upgrade of NuForce Ref-9V3 SE by Ray A.
"Take everything you liked about the NuForce amps and make it all just a little bit better. As far as I can tell, they've been improved in every way."
TDSS D.R.R.T. + Power Supply Upgrade of NuForce Ref-9 V2 by Tyler F.
“Bob - I just wanted to tell you that all the reviews are spot-on... PLEASED!!!"
TDSS D.R.R.T. + Power Supply Upgrade of NuForce Ref-9 V2 Amplifier BY Robert B.
"I'll cut straight to the chase, however great you think the NuForce amps sound in their stock form, you'll be quite surprised what the TDSS mods can do to make an already great amp (or mono amps) stellar."
TDSS D.R.R.T. Upgrade of NuForce Ref-9 V2 by Pat M.
"Saying that I am happy with these 'new' amps would be an understatement."
TDSS D.R.R.T. Upgrade of NuForce Ref-9 V2 SE by Jacques H.
"... the upper bass frequencies to extension beyond human hearing were more defined and punchy than all the other amps."
TDSS D.R.R.T. Upgrade of NuForce ST-8.5 by Dave S.
"The overall sound of my system couldn't get much better, all the audio superlatives apply: Bigger, deeper soundstage; perfect timbre; improved retrieval of micro-detail; on and on."
TDSS D.R.R.T. Upgrade of NuForce MCH-300C7 by Kerry B.