Thanks Marco, these look great!
As you can see from the internals, we are using the 6SN7 drivers with as short a signal path as possible. Power supply is located as far away from sensitive input signals as possible and power transformer is mounted vertically to limit stray emissions in the plane of the audio signal.
The headphone circuit can also be seen, in the lower right front quadrant of the preamp. It is a purely discrete, MOSFET based follower circuit, biased in Class A to provide what I believe to be a very high quality integrated headphone amp. This is opposed to the typical op-amp based afterthought offered by many mfrs.
All controls are via pushbutton and the control circuit is much more complex, allowing for much greater function via the 10-key remote!
Remote and balance controls are also located as close to input signals as possible, to keep noise levels down.
The two 20-pin headers and open outlined space on the board is where the optional phono or DAC board is installed. Phono design is being finalized right now and DAC upgrade to follow later this year.
The taller chassis allows for greater range of rectifier choices, including 5U4GB, 5V4GB, 5U4G and 5V4G, but check height of some 5U4G/5V4G type tubes as many are very tall, such as the EML 5U4 and will not fit. Inside chassis dimensions are 5". I will determine max tube dim. and post here also. This max dim. can be found on any tube datasheet, so you can tell which rectifiers will fit and be useable.
The 6SN7 tubes are being operated at VERY conservative operating pionts, so that tube life will be very long. The use of our proprietary 'mu' variant circuit and top quality components result in what we feel to be a perfectly balanced sound, providing the strength of SS circuits with the beauty of tubes.
Thanks,
Dan W.