This amplifier now plays as prototype, we really are impessed by the music it makes already, and we still have to tune it. It will be a tube driven 40W single ended power amplifier with a fully class A FET output stage and output transformers. We believe Single ended output transformers (if properly designed) do a lot of good things:

	In a single ended transformer a lot of energy is stored by the DC current. This energy can be given to the speakers right away, not through capacitors. This gives very high dynamics.
	Peak power typically is 4 times higher than a normal amplifier because of the inductive effect of the transformers.
	There always is a decoupling between the power stage and speakers, so no relays or other protection is needed, things which are in the signal in most power amplifiers.

This amplifier in fact is build exactly the same as for example a 845, 211 or GM70 single ended tube power amplifier. The big advantages of FETs over tubes in such a design are:

	We are able to use a 100V/1A power supply instead of a 1000V/100mA power supply. The latter almost is impossible to design well, let alone to find the right parts. A 100V/1A power supply is much more easy to build with better parts.
	Output transformer is 100R to 8 ohm, instead of 10k to 8 ohms. This means 1/10 of the windings, so much higher bandwidth, we aim for 5Hz to 70 kHz, better damping, more dynamics and less loss.
	No heater supply, a great burden with large directly heated power tubes.

The only disadvantage is that we use FET's instead of tubes, but are they really a disadvantage...? We are able to demonstrate this soon...

We finalized the prototype with new output and power transformers this week. Specs are great, 5Hz to 80 kHz, damping factor about 30 with zero feedback, 40W output with very low distortion, very high peak power, very good sound. Also very silent when operation, and when powered on and off. More later...