A tip for those using First Sound Preamps


I recently purchased a Firs Sound Deluxe Presence Mk III used, and called Emanuel Go (the designer) to ask some questions as well as tube recommendations since it didn't come with a manual. I'll note here that he is a very soft spoken, but kind and helpful man.

Tis pre uses one 6922 for each channel, and as most of you probably know, good ones can be very costly, and those are beyond my budget. Anyway, when I asked Emanuel for his recommendation, I was quite surprised at his answer. He explained that he had decided to experiment with using 5670 tubes in the place of the 6922 because he had heard the tube used in a DAC designed by a small company that he respects and was impressed. Of course, it needs a tube adaptor so that it can fit. An audio friend of his tried the 5670 in his pre in place of his very expensive (Siemens?) tubes and was impressed. 

I found the tubes and the adaptors on ebay for a total of $34.00, and after living with them and comparing them to my mid-grade Dutch tubes, I can confirm that in my system, they are superior to the 6922. There isn't much difference in the level of transparency, as both are very good, but the body of the sound and dynamic impact are markedly improved, as well as a more natural and lifelike presentation.

it's so affordable that no matter how doubtful you might be, there isn't much to lose by trying.  

128x128roxy54

Ha! It's okay. No one ever bats 1000%. Congratulations on acquiring your new line stage and I hope you enjoy it for many years.

Charles

@charles1dad 

Thanks Charles. I struck out trying to better my previous preamp 4 times, but the First Sound is really special. I clearly recall hearing one for the first and only time at Savant Audio in Princeton NJ about 35 years ago, and lusting after one ever since.

Some used ones would occasionally become available, but the money was never there when they did. Still no remote control, but the volume knobs are so large and the clicks are so well defined that it is still much easier to use than my previous dual volume control preamp.

Very nice.  I wasn't familiar with that preamp, so I did some googling.  That's an impressive piece of gear. 

I have ten NOS PCC88 tubes sitting in boxes.  I bought them for a conrad-johnson preamp that I had for a month. It developed an issue and I returned it.  I didn't need 10 tubes, but I had bought extras. 

Congratulations. It is great to hear you upgraded with so many different positive experiences.