Reviews/ Comments

Clive Meakins, Enjoy the Music.com

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"The Herbie dampers killed microphonics stone dead." (from review of Tram MkII preamp)

Steve Smith, Los Angeles, California

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"Just wanted to say thanks for the tube dampers. I had filament rattle in one of my power tubes in my guitar amp and these solved the problem immediately. And the sound seems to have improved as well. Well done."

Rich Rosten, Yorktown Heights, New York

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"Thanks for everything. They arrived the other day, and have eliminated 99.9% of my tube rattle problem. I wasn't expecting them to work as well as they do."

Bruce Mark, Olathe, Kansas

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" I have a couple sets of dampers from you for my power tubes in my Fender Deville and love them!"

Ryan O'Dea, San Clemente, California

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"I am blown away with the sonic 35s I got in the mail today. I was getting pretty bad tube rattle on my JJ 6L6 tubes in my Deville 410, and your product completely solved it! Thanks!"

Rev. Terry Davidson, Baulkham Hills, Australia

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"I had trouble with microphonics, with the EF86 pentode tube in my guitar amp no matter how many tubes I tried. So I thought I'd experiment with your tube damping device. I have just slipped it over the tube and what a difference, the microphonics are minimized but surprisingly the sound is more focused and detailed."

Michael Campbell, Lasswade, U.K.

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"I've been using five UltraSonic 9 Damping Instruments in my Fender Blues Junior for several weeks now and would like to take this opportunity of letting you know that I am more than satisfied with the results!

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"I confess this started off as an experiment as I had just swapped out all 5 Groove tubes for their 'JJ' equivalents. When I received the Junior, I felt that the hum and hiss levels were unacceptable. Also there was quite distracting microphony (at first I attributed this to the spring reverb) while playing certain notes. The tube replacements resolved most of these issues but, at the back of my mind, there nagged that link on the Eurotubes site to your damping instruments. So, I decided to go that extra mile and place the order :)

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"Well, to say I was amazed at the results is an understatement, and that was even before the dampers had had time to 'bed in'. The improvent to the clarity of the sound is, to my ears, extraordinary. These units do everything you say and, while the results from the Junior were very good prior to taking this additional step, I now feel I have the marriage of dreams between my Fender American Deluxe Stratocaster and the 15 W Fender Blues Junior.

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"Anyway, thank you very much and thanks also for the excellent service. You've made a 60+ year old guy very happy indeed!"

Korey Hicks, Minneapolis, Minnesota

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"My Dr. Z Carmen Ghia guitar amp rattled like crazy, and drove me absolutely nuts. I put those dampers on there, and the buzz went COMPLETELY AWAY!!! Thank you so much!!!!!"

Pete

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"I have a pair of your dampers on my old Pro Reverb (6L6's) and they really help.

Kevin Ledbetter, Fremont, California

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"Thanks for getting the damping rings to me. They really work well on the tubes in my guitar amps. I put them on 2 tubes that would whistle when they got warmed up and I turned the amp up. After putting on the rings they were dead quiet. I will be putting them on all my equipment."

Mark Ransom, Stewartstown, Pennsylvania

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"The UltraSonic 9 arrived today. Thanks for the quick turn around. I'm using the damper ring in a 40 watt guitar amp. The original intent was to attempt to kill a obnoxious rattle when 'A flat' was fretted at moderate to loud volume. The ring took care of the rattle about 90%. An unexpected improvement in overall clarity also took place. My amp sounded very good before. Now it's sounds 'luscious'. Very happy!"

Garry MacDonald, Camino, California

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"WOW -- THANKS! I just recently got a slightly used (2005) Peavey Classic 30 (guitar amp). I guess these are notorious for tube rattle. The damping instruments on the EL84 power tubes got rid of the rattle immediately."

Milton D., Brighton, Massachusetts

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"I noticed an improvement immediately. I was really surprised because I've never fooled around with trying to make improvements before. I have a guitar amp, and it makes just a nice difference."

Josh, Zeeland, Michigan

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"I recieved the nickel damping rings today and just put my Peavey Valve King guitar amp through its paces. Although I have to admit it did not solve the still mysterious rattle near the tubes, the sonic benefits were well worth the investment! So I am keeping them.

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"I noticed a distinct difference in the sound consistency as the volume increased. The amp sounds more tight and balanced than before. Thank you for the product and very fast service!"

"Jester" Johnson, Texhoma, Oklahoma

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I have to say this is a great product--It stopped the rattling about 99% in my ef86 tube."

Graham Diack, Lisburn, United Kingdom

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"Instantly improved! (Vox AC-30 guitar amp.) The bass seemed to tighten up some, which has made the amp more focused and less muddy -- and I didn't even know it was muddy. Best of all, when overdriven, the tubes have increased clarity, and the breakup is smoother and more defined. Stunningly quiet and none of the rattle I was getting before."

Guitar Player, Japan

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"I put the dampers on my three 12ax7 pre-amp tubes on my Fender HotRod Deville 212. Wow, what a difference in clarity and overall tone of the amp. No more microphonics for me. Thank you for offering such a great product."

Chris Evans, Denver, Colorado

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"The dampers sound very nice in my system. I can clearly hear a more refined sound coming my speakers.  I'm using a couple of them on my guitar amp since it suffers from severe microphonics."

Cliff Schaumburg, Falls Church, Virginia

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"Received my 9's and installed them on the pre-amp and reverb driver tubes in my Alessandro Working Dog guitar amplifier. I’ve played it in excess of eight hours in two sessions and haven’t heard anything but guitar (that’s a good thing, by the way). Prior to installing the damping devices, every tube I put in these positions would feed back after an hour or so. I haven’t noticed any of the subtleties of tone that I read about in some of the reviews. I attribute that to the nature of the beast though. The big difference is now I can use pretty much any of the 12AX7 and 12AT7 tubes in my collection without microphonic feedback and that’s good enough for me. Good product. I will recommend it to my friends. Thanks."

Ron Crawford, Washington

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"I recently installed my first set of damping instruments on the two EL84 power tubes in my combo guitar amp, and they work great. So well, in fact, that even though my audible vibrations were clearly coming form those power tubes, I’m considering adding them to the three 12AX7s as well."

Erich Seehafer, Waldorf, Maryland

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"I want to say thanks and tell you how much I'm enjoying the damping rings I recently purchased. I've been playing guitar for just over forty years now, and I've always enjoyed the sound of the good old tube amps such as those made by Fender (in particular), Marshall, and Hiwatt. I played professionally for quite a few years and am very familiar with the tonal characteristics and performance capabilities of these amps. I love tweaks; over the years I've made some enhancements. By replacing and upgrading the speaker wire in my Hot Rod Deluxe I achieved an improvement in tone and output. Paying attention to biasing helps also. Now, the single biggest difference happened when I slipped five damping rings onto my little Fender's tubes. The gain noise that has always been a part of my amps has all but vanished; that in itself is huge. Equally important is the tonal change: highs are less strident, plenty bright and, to me, more pleasing sounding. Mids are wonderful, can't ask for anything more in that range. Bass now has an organic sound and feel to it; hope this makes sense, but that's how I'm perceiving it, very cool. I'm getting the word out to my fellow guitar players, most like me, fiftysomethings who think they've heard it all. Wait 'til they hear the difference!"

Bruce Jobson, Snellville, Georgia

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"Just thought ya'll would like to know results of adding the dampers to my son' s Fender Hot Rod Deluxe. It was an immediate improvement. Overall it is punchier, and crisper with a richer tone. The bottom strings have much better pitch definition and fullness regardless of how aggressively he plays. Great product!"

Ronald Pickering, Sacramento, California

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"I was getting some filament rattle on the 6V6 tubes of my Fender Princeton Reverb. No more!" 

Chin Lai, Potomac, Maryland

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"I listened to REF 3 over the weekend with the new Guitar Amp Damper Pads. Friday evening, I put on the major culprit, a nice sounding, but with slight emphasis on percussion, Norwegian KKV Kari Bremnes album. The tinkle was nowhere to be found. I was comfortable enough to turn up the volume from low to high 70dB. These pads are huge success. The sound is airy as the preamp should be and rich in harmonic textures. This preamp is very resolved along with notable instrumental presence, i.e. high definition in ARC's terms. I suspect whatever amount of grunge was accentuated with the high definition. Furthermore, it is dynamic and can amplify the nastiness with impact. It was analogous to have someone playing imperfectly close to my ears. Previously, my ears felt overwhelmed with pain after a while. I am greatly relieved that the anomaly is gone. I would not have imagined that the small pads could make so much difference without first hand experience. Thank you kindly for your excellent advice and follow-up service. I can now enjoy the REF3 as intended."

K, California

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"Today I tested two Guitar Ultrasonic 9s and an Ultrasonic 30 in my modified 1973 Fender Vibro Champ. I played only at low volumes, first driving my 1967 Bassman cabinet with two 12" speakers, then the Champ's own 8" speaker. I assume that for this reason at least, the effect of the UltraSonic on the power tube alone was not pronounced.

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"But together with the Guitar UltraSonics on the preamp tubes, the difference was significant, similar to what I had heard in hi-fi applications: everything came into focus; the bass and low midrange became tight and punchy, net volume seemed to increase, and the rich harmonics inherent in my 1969 Fender Precision Bass and the tweed Princeton circuit-enhanced little Vibro Champ sang and chimed."

Kosin Chatchavalnon, Thailand

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"The dampers have been working great for me! Never though something like this could improve the tone, I was real skeptical at first, let me tell you that much. now I'm a believer :)" 

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