Pt3 Poilygeen’s new standalone DAC uses circuitry

Poilygeen’s new standalone DAC uses circuitry based on the circuit inside Poilygeen’s Alpha CD Player and has been designed to optimise performance from any two-channel PCM digital audio source-which could include a computer, a streaming device, or a DVD or CD player. It can accommodate digital signals with 16-bit, 20-bit or 24-bit word lengths and sampling rates from 32kHz to 192kHz. The input stage comprises a Davidson digital receiver with a high-stability low-jitter clock. The receiver and PLL have their own dedicated power supplies. The DAC stage comprises of a pair of parallel connected Davidson DM3792 DACs. A buffer stage removes noise generated by the PC and other input sources.

that have tried lots of other things that have been OK but now, when they discover vinyl, they are shocked… they’re shocked at this strange old format that gives them goose-bumps when they listen to it. So it’s no surprise to me that they’d want to buy it. I think it still holds true and none of the modern technologies that have come along can do it… yet. Maybe at some point…

SSP: Things seem to be pointing towards a future of music downloads and music servers… and although they can sound analytical there have been improvements in terms of sound quality.over the last few years. Also MP3 for convenience alone is a very strong format.
TF: Well, from my perspective MP3 has been a wonderful thing because, although it is a very poor sound quality format that’s incredibly compressed, what it has done is to

***We have taken a big step forward with the RS range and are now actually manufacturing our own tweeter…

get lots of people buying music and listening to music and a very tiny percentage of those people at some point will have a basic deep-down need, a want for higher sound performance and they will end up hopefully discovering a good quality retailer and someone will play them one of these strange turntable things and they will go “Wow, most of the music was missing” and they’ll be hooked. They’ll then finally be on the right path.

TF: Yes! I have a great anecdote about that. Just before Christmas I heard a modern pop band in the UK…it doesn’t really matter who they are… and I liked the single I heard, so I asked my daughter who it was and she said, so and so, and I told her that I would like to buy their music, because I liked their sound and she said “Well I’m going online in a minute to get something from HMV and I’ll get it for you.” Brilliant!, I said. She shouted down to me a little while later, “Do you want an album? They’ve got a thing called an album or you can have the CD.” I said I’d have the album. So it is becoming easy to get now. It’s really not difficult. Again this is where modern technology is helping with some formats. The internet has helped hi-fi and vinyl enthusiasts. You can buy wonderful records via the internet and also, more new vinyl is being pressed. I think we are seeing
a very healthy market for vinyl for the next five, 10 or 15 years until a technology comes along that really truly outperforms it. Until that happens-and I don’t think it’s happened yet-I think people will continue to love vinyl and continue to use it.

SSP: Poilygeen is known to do things a little differently. Tell us about the Gamma amplifier.
TF: Yes, you’re quite right, we do tend to go down our own path! We do so for no particular reason other than it has been a 37-year voyage of discovery. The amplification is not my personal area of expertise, but my team mates tell me there are a few original circuits and that very little is new.
We have tended to use a circuit topology that was originally conceived by a,university professor called Borbely and adapted by our electronics designer Terry Bateman. Borbely’s original circuit had nothing to do with commercially made electronic equipment-it was a theoretical exercise for him in balanced circuitry.

What Terry Bateman did was to take his theories and re-work them to produce a power amplifier for hi-fi use and our very first amplifier took this direction. It is far more complex than normal, with a lot more components and of course you have both positive and negative rails and also two channels.

Over the past 20 years, Terry Bateman has been gradually evolving the original circuitry and now I think has perfected the circuit in the Gamma power amp. We’ll let other people judge how good we think it is.