4 DuoDAMP TUBE DAMPERS 6BA6/5749/6AU6/6GK5/6FQ5/EL95/6X4 MARANTZ McINTOSH YAQIN

Description: We are very pleased and proud to report that on January 5, 2021 we celebrated our 23rd year of selling on eBay! Please check our 23 years of eBay feedback. Thanks to you for your continuing support! IMPORTANT NOTE: PLEASE BE CAUTIOUS ABOUT PURCHASING CHEAPLY MADE ASIAN DAMPERS. THOSE MAY LOOK SIMILAR TO OURS, BUT THE MATERIAL USED IN THE CHEAP ASIAN DAMPERS IS NOT THE SAME AS OURS AND THOSE CHEAP DAMPERS FREQUENTLY MELT OR CRACK. WE SELL OUR DAMPERS TO SEVEN MAJOR AMP MANUFACTURERS FOR USE ON THEIR EQUIPMENT BEFORE IT LEAVES THE FACTORY. PURCHASE WITH CONFIDENCE HERE. PLEASE CHECK OUR 16 YEARS OF EBAY FEEDBACK. NOTE: THIS DuoDAMP sm DAMPER IS OUR NEWEST AND MOST EFFICIENT DAMPER. THIS IS OUR OWN DESIGN AND AFTER EXTENSIVE TESTING OF MANY DESIGNS IN DAMPERS, THESE DAMPERS ARE THE MOST EFFICIENT DESIGN WE HAVE EVER PRODUCED. THESE DAMPERS ARE FABRICATED FROM TWO DIFFERENT MATERIALS. HIGH TEMPERATURE Black Viton MATERIAL IS USED FOR THE INNER RING, WHILE 400 DEGREE Red Silicone MATERIAL IS USED FOR THE OUTER RING. THESE DAMPERS ARE CONSIDERABLY MORE EXPENSIVE TO PRODUCE THAN OUR OTHER DAMPER DESIGNS AND HAVE BEEN FABRICATED FOR THOSE AUDIOPHILES AND MUSICIANS WHO WILL SETTLE FOR NOTHING BUT THE VERY FINEST DAMPER AVAILABLE. In our extensive testing, we have not found any other damper from any manufacturer that outperforms our DuoDAMPS, not matter what the cost of the other dampers. THIS IS AN AUCTION FOR FOUR (4) Size Ex. Small DuoDAMP Dual Compound HIGH MASS VACUUM TUBE DAMPERS. The winner of this auction will receive four dampers for each item won at a cost of just $49.99 for the complete set of four dampers. If you need more than four dampers, just bid for more than one set. Shipping on extra sets shipped in the same package is free both in the U.S. and Internationally after postage is paid for the first set. These dampers are designed to fit 7 pin vacuum tubes. Most audiophiles and musicians use two dampers on each tube. These vacuum tube dampers are constructed from twin materials, consisting of a ring of Viton followed by a ring of aerospace quality silicone with a temperature rating of over 400 degrees F. So this set of four dampers will improve the sound of two tubes if you use two dampers per tube as recommended, or improve the sound of four tubes if you would like to try one per tube. This is one of the easiest, lowest cost ways available to improve the sound of your system. These dampers extend 3/8" from the glass. With tubes that are spaced close together, you can offset these as shown in the photograph so they will not interfere with each other, not a problem at all. The use of these vibration dampers is especially important for audiophiles as the small vibrations in the listening room can adversely affect the quality of the sound from the system. These dampers are also very important for musicians because the levels of vibration in your amps while performing, are even greater than in audiophile amps. These heavy-duty high density dampers will fit the following and other similar size 7 pin vacuum tubes such as: 6BA6, 5749, 6AU6, 6GK5/6FQ5, 6AK5, 5654, 6J1, 6AQ5, 6ER5/EC95, 0A2, 12X4, 6X4, etc. THESE DAMPERS ARE "DuoDAMP-SIZE EX. SMALL". I HAVE A TOTAL OF 20 DIFFERENT SIZES/TYPES TUBE DAMPERS AVAILABLE ON EBAY TO FIT ALMOST ALL TUBES. PLEASE SEE MY OTHER AUCTIONS FOR OTHER SIZES. NOTE: FOR MOST FOLKS, OUR "REGULAR" SIZE Ex SMALL DAMPER RINGS WILL BE PERFECT AND WILL COST LESS, BUT IF YOU HAVE A VERY FINE SYSTEM WANT THE ABSOLUTE MAXIMUM PERFORMANCE FROM YOUR TUBE EQUIPMENT, THEN THESE DAMPERS ARE FOR YOU. Please read some comments I have received about these dampers from folks who have recently received these dampers from me: Audiophile Robert Kemper had these very interesting comments on our DuoDamp Dampers, please take a moment to read his thoughts: "Sandy, I have written to you previously to comment on the great performance of your tube dampers, and the incredible value they represent. I have now seen your dampers (or ones that look like them) on many pieces of new pro equipment. Over time, I have learned to be a believer in vibration management, particularly with tube electronics, and I guess some manufacturers have caught on. Recently, I acquired an Arcici suspension equipment rack and was pleased by the noticeable improvement in the background “quiet.” I have been using your regular tube dampers on all of my tubes, so I have to tell you how surprised I was by what happened when I installed your new “High Density DuoDamp” dampers. When I received the new dampers, I invited a fellow audiophile over to help me discern any audible changes that might occur with the change in dampers. I put them on the front-end tube of my amp, and all of the tubes in my preamp. I expected little change since I thought I had things pretty well in control, but you have never disappointed. I like to describe audible changes in terms that my friends can understand, for example: “It’s like a new interconnect,” or “a new preamp,” or “it’s a subtle but audible change in the upper frequency clarity, etc.” What my friend and I heard with your new dampers is at least in the domain of “new interconnects,” and borders on the domain of “new preamp.” I can’t explain why (perhaps the new dampers achieve “critical mass” of damping), but the soundstage opened up enormously, the bass was less muddy, the midrange had better “tone” and the top was far less congested. We were dumbfounded by the change. Congratulations on a great design. P.S. I did have some problems wrestling the second red damper atop the black Viton damper. However once I did get it done it was well worth the effort". Robert Kemper, Miami, FL NOTE FROM SANDY ABOUT ROBERT'S COMMENTS (ABOVE): Robert, I appreciate your support and the time you have taken to let everyone know of your experiences with our DuoDamp Dampers. And yes, we now have six major manufacturers using various models of our dampers in their equipment. I am not permitted to list the names, but these are major Audiophile equipment manufacturers and a number of Boutique guitar amp manufacturers. Regarding your P.S. and the tight fit of the second red damper. This tight fit is absolutely necessary for the damper to operate as designed, since too loose a fit would result in both the damper coming off during heating as well as a reduced dampening performance. And as you state, the small effort during installation is certainly worthwhile in sonic improvements gained. Audiophile Nigel Pickerson emailed the following comments: "Thanks for your latest damper design. My listening tests confirm that your DuoDamps out perform any other damper I have used. The cymbals now “sizzle” like never before, whilst the detail in the midrange and lows are amazing. I would not use my valve equipment without your dampers after listening to these splendid improvements! Cheers! for you." Nigel Pickerson, Kent, England Audiophile Bob Rizzo writes: "Sandy, I love your new damper design, these DuoDAMP dampers are it!! The detail is now amazing! I never thought something so simple as this could make such a tremendous difference! Thanks again! Bob Rizzo, Newark, NJ And if you play guitar and feel that this product is only for HiFi, please read what Guitarist Vinnie Ulibarri of Colorado emailed me: "Barbara & Sandy, I've had a week-or-so to check-out the effect of your products, the DuoDAMP tube Dampers and the SilClear tube-enhancement paste in several guitar amplifiers. First, I typically don't write about sound products until I've had them for about a year. If I keep it a year, its gotta be good! If its not good, its gone! The first test was to see if the tube dampers and tube-enhancement paste could make a really, REALLY great sounding guitar amp (Matchless SC-30 w NOS Tungsram EL84 output tubes), sound better. A tough test! The DuoDAMP dampers installed easily on EL84 output tubes and when placed directly over the tube's mica supports, quieted annoying tube rattle I was experiencing. Worth the price! The SilClear tube enhancer improved the fidelity as well. But I'm a tough-sell and I wanted to be "knocked-over". Next, I used the SilClear tube-enhancer in my '65 black-face Vibrolux and '58 Fender tweed. WOW!!! I'm amazed at the sonic improvement the tube-enhancement product made. I'm totally "knocked-over" by this product! The vintage amp output is more balanced and there is a huge improvement in fidelity. My vintage tube amps with the SilClear tube-enhancer sound like I've never heard them before! Best regards! Vinnie U." Vincent Ulibarri, Denver, Colorado William Chee of Singapore says: "I love your other dampers and I wanted to try these DuoDAMPS as well. I can tell any audiophile that these are sonically better than any other damper I have ever used. No ifs, ands or buts about it! Thanks for letting me test these" William Chee, Singapore FREQUENTLY ASKED QUESTIONS: QUESTION: WHAT IS THE DIFFERENCE BETWEEN THESE DAMPERS AND THE ROUNDED EDGE RING TYPE DAMPERS YOU HAVE BEEN SELLING FOR MANY YEARS ON EbAY? ANSWER: THESE DAMPERS EACH HAVE OVER 3x THE MASS OF OUR STANDARD SIZE EXTRA SMALL DAMPERS WHICH FIT THESE 7-PIN MINIATURE TUBES. IN ADDITION, BECAUSE THE MASS IS FARTHER FROM THE GLASS THAN WITH OUR STANDARD DAMPERS, THE DAMPENING EFFECT IS GREATLY MULITPLIED. IF YOU USE TWO OF THESE DAMPERS ON EACH TUBE, YOU WILL HAVE ABOUT 12x THE EFFECTIVE DAMPENING PROPERTIES THAN IF YOU USE TWO OF OUR REGULAR SIZE SMALL DAMPERS ON THE SAME TUBES. QUESTION: WILL THESE DAMPERS CAUSE MY TUBES TO RUN TOO HOT? ANSWER: ABSOUTELY NOT! These DuoDAMP High Density/HIgh Mass dampers will not interfere in any measurable way with the proper dissipation of heat from a vacuum tube when two dampers per tube are used as recommended and the approximately 80 sq. mm area that these dampers cover, will not measurably affect tube cooling. In fact, these dampers also absorb and actually dissipate heat and will contribute to the cooling of the vacuum tube. in our testing, we have very carefully measured the operating temperatures of vacuum tubes both with and without our dampers installed. In every amp and preamp we tested, the tubes run 1-4 degrees COOLER with our dampers installed, than with no dampers installed. QUESTION: IS THE MATERIAL USED IN THESE DuoDAMP DAMPERS DIFFERENT THAN THE MATERIAL USED TO FABRICATE YOU REGULAR DAMPERS? ANSWER: YES, THESE DuoDAMP DAMPERS ARE FABRICATED FROM TWO DIFFERENT METERIALS. THE INNER RING IS MADE OF VITON WHICH WILL WITHSTAND A HIGHER ETMPERTURE THAN SILICONE. THE OUTER RING IS MADE FROM THE EXACT SAME MATERIAL AS OUR REGULAR DAMPERS. WE HAVE FOUND THAT THIS COMBINATION WILL PRODUCE THE MOST EFFICIENT DAMPER WE HAVE EVER TESTED. QUESTION: CAN I OVER DAMPEN MY TUBES? WILL THESE DAMPERS "DULL" THE SOUND? ANSWER: ABSOUTELY NOT! YOU DO NOT WANT ANY MICROPHONICS IN YOUR VACUUM TUBES! THESE DAMPERS WILL PROVIDE THE MAXIMUM DAMPENING TO YOUR TUBES, AND WILL IMPROVE THE SONICS OF EVEN THE FINEST NOS TUBES. QUESTION: WHY ARE THESE SO EXPENSIVE? THEY COST ABOUT 10 TIMES THE PRICE OF YOUR REGULAR DAMPERS. ANSWER: THESE DuoDAMP DAMPERS ARE MADE FROM TWO DIFFERENT TYPES OF MATERIALS. VITON (the inner ring) is EXTREMELY EXPENSIVE AND HAS BEEN SPECIALLY DESIGNED & MOULDED TO ACCOMMODATE THE OUTER RING. QUESTION: ARE THESE NEW DuoDAMP DAMPERS AVAILABLE IN ANY OTHER SIZES OTHER THAN FOR 7-PIN MINIATURE TUBES? ANSWER: AT THIS TIME WE HAVE OUR DuoDAMP DAMPERS TO FIT THESE 7-PIN MINIATURE TUBES, TO FIT 9-PIN MINIATURE TUBES, AND TO FIT TWO OTHER SIZES OF OCTAL BASE TUBES. WE ALSO HAVE OUR DuoDAMP DAMPERS TO FIT 300B TUBES. WE MAY PRODUCE THESE DuoDAMP DAMPERS IN OTHER SIZES IN THE FUTURE, DEPENDING ON THE DEMAND. IN THE MEANTIME, WE HAVE 19 OTHER SIZES OF DAMPERS AVAILABLE ON OUR OTHER EbAY AUCTIONS. QUESTION: ARE THESE DAMPERS AVAILABLE IN ANY OTHER COLORS? ANSWER: NO, AT THIS TIME THIS BLACK AND RED-ORANGE COLOR IS THE ONLY COLOR AVAILABLE. IN THE FUTURE, WE MAY BE ABLE TO OFFER THESE DAMPERS IN ANOTHER COLOR, BUT NOT AT THIS TIME. QUESTION: SHOULD I GET REMOVE MY REGULAR DAMPERS THAT PUCHASED PREVIOUSLY FROM YOU AND CHANGE TO THESE SoniKLEER DuoDAMP DAMPERS ON MY 7-PIN MINIATURE TUBES? ANSWER: THIS IS NOT A SIMPLE ANSWER...IF YOU ARE TOTALLY HAPPY WITH THE PERFORMANCE OF YOUR SYSTEM WITH OUR REGULAR DAMPERS, THERE MAY BE NO REASON TO CHANGE. THESE DuoDAMP DAMPERS WERE DESIGNED FOR FOLKS WHO WANT THE ABSOLUTE MAXIMUM PERFORMANCE FROM THEIR SYSTEMS. AUDIOPHILES HAVE MADE NUMEROUS COMMENTS ABOUT THE IMPROVEMENTS THAT OUR DuoDAMP DAMPERS OFFER OVER OTHER TYPES OF DAMPERS. HOWEVER, IT IS DIFFICULT FOR US TO ADVISE ANYONE AS EACH OF US HAS OUR OWN FEELINGS ABOUT HOW OUR SYSTEMS SHOULD SOUND. I CAN TELL YOU THAT THESE DuoDAMP DAMPERS WILL SOUND DIFFERENT FROM OUR STANDARD DAMPERS AS WELL AS DIFFERENT FROM OTHER BRANDS OF DAMPERS. MOST FOLKS LIKE THEM VERY MUCH. OUR STANDARD DAMPERS ARE A TERRIFIC VALUE FOR THEIR LOW COST, AND THESE DuoDAMP DAMPERS ARE ALSO AN EXCELLENT VALUE SO THE CHOICE ABOUT WHICH DAMPER TO USE IS TRULY A PERSONAL ONE. YOU MIGHT WISH TO TRY A FEW OF THESE DuoDAMP DAMPERS IN YOUR PREAMP FIRST, AND THEN MAKE A DECISION ABOUT THE REST OF YOUR TUBES. THE IMPROVEMENT WHEN YOU GO FROM NO DAMPERS TO OUR REGULAR DAMPERS IS HUGE, THE DIFFERENCE BETWEEN OUR STANDARD DAMPERS, OUR SoniKLEER DAMPERS AND THESE DuoDAMPS DAMPERS IS SIGNIFICANT BUT NOT AS GREAT AS WHEN GOING FROM NO DAMPERS TO OUR STANDARD DAMPERS. ...A WORD ABOUT DAMPER THICKNESS We now have TWO damper designs availble to fit 7-pin miniature tubes. 1) Our REGULAR Size Ex SMALL which we have been offering on eBay for many years and which are available on our other eBay auctions. These are wonderful dampers and at the cost of just $9.99 for a set of 8, are an excellent value as well. Unlike some other sellers, we only sell one thickness of our REGULAR tube dampers. We only sell dampers of the heaviest thickness available. This is because through testing and experimentation, we have determined that in order to obtain the maximum benefit from tube dampers, you need to use the heaviest mass damper available. Why bother at all if you are not going to get the maximum effect? 2) These Size Small DuoDAMP Dampers on this auction which is our newest innovation in damper technology. NOTE: These DuoDAMP High Density/HIgh Mass dampers will not interfere in any measurable way with the proper dissipation of heat from a vacuum tube when two dampers per tube are used as recommended and the approximately 80 sq. mm area that these dampers cover, will not measurably affect tube cooling. In fact, these dampers also absorb heat and will contribute to the cooling of the vacuum tube. in our testing, we have very carefully measured the operating temperatures of vacuum tubes both with and without our dampers installed. In almost all cases, the tubes run 1-4 degrees COOLER with our dampers installed, than with no dampers installed. FURTHER CLARIFICATION ON DAMPER THICKNESS Some folks have compared Vacuum Tube Dampers to shock absorbers on mechanical devices such as automobiles. I have discussed this comparison with vacuum tube engineers, and they tell me that this is a false analogy. For example with an automobile, you want to “feel the road” to some extent. With vacuum tubes, you never want the tubes to “feel the vibrations” or have any microphonics. A totally dampened tube is very desirable (if not fully attainable). When vacuum tube engineers design these tubes, vibration and microphonics are not factored into the equation. Overdampening a speaker will dull out the sound, but that is not the case with vacuum tubes. Internal vibrations within a tube’s mechanism are never good, and even small ones will diminish the quality of the sound. Engineers who have designed tubes have told me that a totally vibration free tube is the “Holy Grail” to which the design engineers strive. In a high-quality tube design, vibration free supports and thick mica insulators are what is specified…not thin supports and thin mica to allow vibrations. This philosophy has been explained to me by a retired Vacuum Tube Engineer who worked for RCA designing vacuum tubes during the 1950's and retiring in 1968. He is also an audiophile and we have had some very interesting discussions about tube design. I also have a distant relative who worked for Raytheon in tube design, and although he mainly worked on transmitting tubes, he also echos the same philosophy about microphonics. Microphonics to any extent are not desirable, and the very best sound comes from tubes where the microphonics are not detectable. Hence our decision to market only the highest density dampers. NOW...A WORD ABOUT MICROPHONICS Microphonics is a characteristic of all vacuum tubes to some extent or another, when in use. Microphonics occur when vibrations (both small and large) to the internal parts of the tube, affect the way those internal components process the electron flow through the tube. We normally only hear about microphonics on defective tubes or very inexpensive tubes, but the truth is, that microphonics are almost always present even in the best and most expensive tubes. Normally we do not notice the effects of microphonics with quality tubes, but after listening to your system with these tube dampers installed, you may very well be able to hear the small but important improvements in the sound. WHAT SIZE AND THICKNESS DAMPER DO I NEED? As stated earlier, we have learned that there is little point in using a vibration damper with low mass. Therefore, we are only offering the heaviest mass dampers available. The tube sizes that these Size SMALL DuoDAMPS dampers will fit are listed above. Please see my other auctions for sizes to fit power output tubes as well as rectifier tubes. NOTE: THE TUBES SHOWN IN THE PHOTOGRAPH ARE NOT INCLUDED IN THIS AUCTION. THEY ARE SHOWN IN THE PHOTOGRAPH TO DEMONSTRATE HOW THESE DAMPERS LOOK WHEN INSTALLED. I have been involved with vacuum tubes since the mid 60’s and I have been selling tubes on eBay since Jan. 1998. I believe my feedback reflects my dedication to selling only the very best products and to my commitment to total customer satisfaction. Please email me using the "Ask Seller a Question: link above with any questions. Feel free to check my feedback and bid with confidence. Please email with any questions before bidding. We accept Visa, MasterCard, Discover and American Express through PayPal. NOTE: We also accept your Visa or MasterCard from anywhere in the world via www.BidPay.com We reserve the right to reject bids from those with negative or hidden feedback. If you fall into this category, please email before bidding! We also reserve the right to declare this auction null and void if eBay is not accessible during the last three hours of this auction. SHIPPING COSTS-DOMESTIC AND INTERNATIONAL-COMBINING SHIPPING (New Postage Rates Effective Jan 22, 2021) Flat rate shipping (no matter how many dampers you have shipped at the same time) VIA USPS First Class Mail within US including Alaska and Hawaii with a normal 2-3 day delivery is $3.99 including a USPS Delivery Confirmation Number emailed to you when shipped. First Class shipping to Puerto Rico is also $3.99. If your invoice does charge you more than one shipping cost for multiple damper orders, please adjust accordingly or email me for an adjustment to shipping cost. 98% of our items are shipped the same day or day after payment is received. Airmail First Class Mail International (4-7 days transit time) shipping outside the U.S. is a flat $16.50 no matter how many dampers you order as long as I ship all together. This means that for INTERNATIONAL SHIPMENTS, including the extra time required to fill out the CUSTOMS FORMS, we charge $16.50 to ship one pack or 10 packs, or 15 packs or even 100 packs will still cost just $16.50 to ship Internationally. This includes packing materials. This policy on flat-rate shipping cost allows us to keep the cost of the dampers themselves as low as possible. ============================================================================================================================= ATTENTION: ITALY / ITALIAN BIDDERS: Due to NUMEROUS AND REPEATED problems with the speed of Italian Customs & Post Office, we cannot respond to questions about shipping via First Class International to Italy for SIX FULL WEEKS after the ship date. If your item is being shipped to Italy via First Class Mail International, please do not email asking about delivery until 6 weeks have passed from the date of mailing. We have had repeated problems with Customs in Italy and buyers in Italy then email us that they have not received their goods. Then...after many emails back and forth during several weeks, the item always shows up. This delay is not caused by us and even though we would love to help, there is truly NOTHING we can do about it. It is the Italian Postal System & Italian Customs that are causing these delays! Other sellers are simply refusing to sell to Italy. We do not want to do that, although we will be forced to if there are consistent problems. We sell many items to customers in Italy! We love our many friends and customers in Italy! You are WELCOME to bid on our items, but please understand and abide by these terms. If you need your item sooner than 6 weeks, please ask us for the cost to ship via Express Mail International which takes about 8-10 days to Italy. Thank you for your understanding! Please click on: "View Seller's Other Auctions" for more interesting items. Please check my feedback and bid with confidence. Good luck & thank you for bidding. You may pay for this item on your Visa, MasterCard, Discover or American Express card at no extra charge through PayPal. If you use PayPal Instant Payment, I will get immediate payment and be able to ship without waiting for your payment to arrive. Thanks and Good Luck to all! PHOTOGRAPH AND TEXT COPYRIGHT SANDYPHOTO 2017 Copying of photos or text will be reported to eBay and further legal action will be instituted. Track Page Views With Auctiva's FREE Counter

Price: 49.99 USD

Location: Miami, Florida

End Time: 2023-12-27T04:57:25.000Z

Shipping Cost: 3.99 USD