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Calling all Von Schweikert VR-9 owners

Guys:

Do you know what is an acceptable level of transformer buzz for the VR-9s? The speakers have huge, 1,000W digital amps in the bass cabinets, and I'm trying to get a handle on whether noise should be audible or not--and to what degree. My electricity checks out perfectly, so that's not the issue. I'm listening in the nearfield, and combined with the fact that the speakers are 96dB with the bass boost on, maybe those factors are causing the buzz to be audible--albeit slightly--from my chair (7'+ away from speakers). My room is very quiet, so maybe that's adding to the audibility. I pulled the amps last night, and put Lock-Tight on the transformer nut and silicone on the back plate, but the buzz is still audible, albeit MAYBE a touch lower in level. FWIW, when I put my hand to the back panel, I CANNOT feel any vibration. Can anyone comment or share their experiences? Thanks!
hooper

Showing 1 response by albertporter

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albertporter
4,949 posts
 
Hooper, I have not seen this amp or it's transformer design, but all ICE amps (including the one Von Schweikert uses?), generally run VERY cool.

If that's the case for the VR-9 amp, you could add automotive damping material around the transformer to quieten it. DIY modders and speaker builders have been using the "peel and stick" variety of this product for years.

If the source of your noise is electrical rather than mechanical, the damping will probably not work. In any case I would NOT make any modifications to the amp beyond a touch of sound proofing. Instead, contact Albert Von Schweikert and ask his advice.

I have known him for many years, If there is a defect he will make it good.
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