Just thought I would paste the communication I received here in case anyone else is interested in the information.
RE: The new 'Truth' mods for the Transporter.
Q - Do you put in your own clock, or use the stock one? The tubes look great, and I bet they sound nice as well.
A - We keep the stock clock as it is already excellent and has a dedicated Jung Super Regulated supply already.
Q - You said that the balanced output is from two transformers. Do they convert to balanced from an unbalanced output stage?
A - Yes.
Q - Any way to have a balanced output straight from the DAC? The 6CG7 is a great tube, I use it in my amplifier, the 6GU7 is another variant and is a slightly lower gain version. The RCA 6GU7 is the best tube I've found in this family and can be had for very low prices.
A - Thanks for the tip RE 6GU7. The circuit type used is SE only. It is possible to run a dual-diff. circuit from the DAC, but the transformers also serve to reduce tube circuit gain by 4:1 and subsequently the noise floor. They also reduce the output impedance to a VERY friendly 110ohms, from the 600ohms otherwise from the tube circuit without OPT's.
Thanks and I hope that this reply is still relevant at this late date. Interest is certainly increasing in this product and those that have it, REALLY are enjoying our modified unit.
Take care,
Dan W.