Bottlehead Kits > BeePre

Noise Floor / Completing Upgrades

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Paul Birkeland:
So you have the second upgrade but not the first upgrade?


https://www.mouser.com/ProductDetail/Panasonic/ECQ-E2225KF?qs=3ERjQB%2FgCVI2gYm7OT416A%3D%3D  Buy two of those.  On the C4S board installed with the 6CM7 upgrade, install each of those caps with one leg in the pad marked with an X and the other end in Breg.  That may or may not make a difference for what you're up to.

The PS Audio has 30dB of gain and the speakers are about 83dB sensitive.  I think this is a pretty good place to put a pair of the -12dB Harrison Labs attenuators. 

onelivewire:
I believe the Constant Current Source was installed without the stepped attenuators, and the Hybrid Shunt Regulator without the balanced outputs. In case it's helpful, I've added a full under-chassis picture in addition to those linked in the original post here: https://imgur.com/a/Ow1b7VD

The original owner made it sound like he was able to special order just those partial part sets from you for those upgrades, which I thought odd but not entirely unfeasible.

I'll take a closer look tomorrow and see where those locations are for adding the caps. I'll admit I'm hesitant on the attenuators, but understand that may simply be the best path.

Doc B.:

--- Quote ---The original owner made it sound like he was able to special order just those partial part sets from you for those upgrades, which I thought odd but not entirely unfeasible.
--- End quote ---

We only sell complete kits.

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