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Preamp UltraSonic: Sonic perfection for your small-signal tubes
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Our firm-yet-compliant isolation pads made of an exclusive silicone/silica formulation, coupled with tempered titanium C-rings, deliver unsurpassed microphonics reduction and amazingly natural sound. Harsh, acute and jaggedy vibrations are reduced in amplitude and smoothed so they do not cause irritating distortions or microphonics and without the damping instruments introducing any resonance or sonic anomalies of their own. With more of the full and pure potential of your preamp tubes realized, your audio system will achieve a new level of high performance. .. Sleeveless pads allow use to 400° F (204° C), which is well above the temperature range of most small-signal tubes, including amplifier input and driver tubes. Not recommended for extremely hot-running 6H30 "supertubes," 5687/6900 triodes, rectifier tubes, output power tubes, or other extremely hot-running tubes (use UltraSonic Rx or original UltraSonic for these). .... Preamp UltraSonics are our default recommendation for all small-signal tubes listed below, for use with CD player, DAC, preamp, and amp. (Preamp UltraSonic tube dampers fit closely around the tube; ideal for Raysonic CD Players, tube microphones, and other limited-space applications.) ........ Preamp UltraSonic 7: This tube damper fits seven-pin miniature tubes approximately 5/8" to 3/4" diameter (16mm to 19mm), including 0A2, OA2, 0B2, OB2, 1S5, 12AE6, 12FK6, 12FM6, 12X4, 304B, 3A5, 3S4, 403A/B, 408A, 5591, 5651, 5654, 6005, 6186, 6AK5, 6AN4, 6AQ6, 6AU6, 6BH6, 6C4, 6ER5, 6FG5, 6FS5, 6FY5, 6GK5, 6J1, 6J6, 6N4, 6P17, 6X4, miniature 6Z4, 7543, 9001, DCC90, DL92, EC90, EF95, SBA6. ......
Preamp UltraSonic 9: This damper fits miniature nine-pin preamp tubes 3/4" to 7/8" diameter (19mm to 22mm), including 12AT7/ECC81, 12AU7/ECC82, 12AX7/ECC83, 12AY7, 12AZ7, 12B4, 12BH7, 12BY7, 12BZ7, 12DW7, 12FQ7, 2C51/396, 417, 5670, 5751, 5814, 5842, 5879, 6072, 6189, 6201, 6267, 6350, 6385, 6414, 6519P, 6688, 6829, 6922, 6955, 6973, 6AN8, 6BL8, 6BQ7, 6C19P, 6C45, 6CG7, 6DJ8/ECC88, 6FQ7, 6GC7, 6GH8(A), 6GU7, 6H23N, 6N1P, 6N3P, 6N6(P), 6U8(A), 6V4, 7025, 7044, 7058, 7119/E182CC, 7199, 7308, 8416, ECC803/S, E288CC, E88CC, EC86, ECC85, ECC86, EF86, EL86, EZ80, and others. ...
Preamp UltraSonic 25: Fits straight-sided octal preamp tubes approximately 1" to 1-1/16" diameter (23mm to 28mm), ncluding metal 12SC7, metal shell 6F6, 6J5, 6R7, 6SJ7, "slim" 6SN7. ...
Preamp UltraSonic 30: This tube damper fits straight-sided octal tubes and other small-signal tubes approximately 1-1/8" to 1-1/4" diameter (28mm to 32mm), including 12J5/GT, 12SL7/GT, 12SN7/GT, 5691, 5692, 6AH4, 6AU5, 6BL7, 6DN7, 6EA7, 6EM6, 6EM7, 6EW7, straight-sided 6F6G, 6FY7, 6H4, 6H4GT, glass 6J5, 6N8P, 6N9P, 6R7GT (glass T-9 bulb), 6SF5-GT (glass tube), 6FD7, 6SL7, 6SN7, 6SN7GT-series (6SN7GT, 6SN7GTA, 6SN7GTB, 6SN7WGT, 6SN7WGTA), PL504.
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Changing gear? Preamp UltraSonic isolation pads can be slid off one titanium C-ring and onto another. If you need a different size than what you have, spare C-rings are available, so you don't have to buy a whole damping instrument to change sizes.
Titanium C-Ring Only (no pads)
Preamp UltraSonic sizes 7 thru 30
$5.89 to $6.59 ea.
(4 or more, one size: 10% off)
Add to Shopping Cart.
Preamp UltraSonic Isolation Pad
$2.99 ea.
(12 or more: 5% off)
Add to Shopping Cart. ...
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90-day no-risk trial. If not satisfied, simply return your Damping Instruments within 90 days for a complete refund.
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Lifetime warranty. If anything ever goes wrong, simply return any Damping Instrument to Herbie's Audio Lab and it will be repaired or replaced and returned to you at no cost.
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Quantity Discounts –
(In addition to individual-item quantity price breaks!)
Order Total Discount Coupon Code
5% 5 8% 8 ...
With plain packaging direct from the
manufacturer, Herbie's Audio Lab offers low prices, high value!
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