PS Audio BHK-250 BHK-300 Amplifiers Best Price with RARE Vintage BHK Select Tubes!!

Don't forget. We take trades and can give you up to 100% of your original purchase price!

Yes, Upscale Audio guarantees the best price. But before you buy any BHK component, read this:

When Bascom King was designing the BHK amps and preamp, he turned to Upscale Audio to try different tube types and get the voicing just where he wanted it. Of course, using vintage new old stock (NOS) tubes could not be used for production, but we have an intimate knowledge and understanding of how to take an already incredible product even better. And not by a small margin.

We found a very special tube made by Tungsram called a PCC88 that Bascom King likes a lot. He should. They add a level of texture and sense of space that is incredible. This upgrade alone will yield a 10% increases in performance. If you already bought a BHK product you can buy this tube from us. But there is another version that I found 20 years ago that was bought by the German Post Office (they have German Bundepost markings) decades ago. Why they would need such precise tubes is a mystery, but I have seen 6922/CCa/PCC88 etc. with these special markings from Telefunken, Siemens, and Tungsram maybe 5 times in my life. A Telefunken CCa from the German Post I sold for $450 each and kept the last stash for myself. And I will set aside some of these. That’s how rare these are.

To make this upgrade the best it can be, we first had them Cryogenically treated at the best lab in the country, Controlled Thermal Processing. We graded them by first selecting those that have the highest transconductance for longest life. Then we look at the measurements and accepted only the ones with the tightest triode balance. We then tested them again,
this time for gain, so the two halves of the tube amplify equally and required a 5% balance. If they pass that test, we put them in a moving coil phono stage with 60dB of gain and listen to them with headphones, carefully listening for both noise and microphony, to achieve the absolute blackest background.

This tube we are calling the Tungsram BHK Select, and it is not available to the public. We can offer you the regular Tungsram, but not these. While the standard Tungsram yields a 10% bump in performance, the BHK Select is off the hook. Remember: This is the low voltage gain device and it’s absolutely critical in determining the sound of BHK preamps and amps.

Every BHK component we sell will come with the stock tubes and two sets of BHK tubes. This will keep you rockin' for 10 years!

Call 909-931-9686 or go to our website www.upscaleaudio.com to order.