Ted_b
ipod touch and Transporter ? That is awesome! Please elaborate. As for the Transporter's performance, its a killer! Why try to re-invent it? In stock form its digital playback. But with a few in house upgrades, fatigue free playback.
I did not commission someone to inside hack the output stage or power supply. Its a well thought out design as is. I just simply worked on tuning the AC line. I also improved the rfi/emi mechanical isolation on my IC's and modified the power cord just to mention a few things, which was key to relieving the burden on its own power supply. A mod done by someone else is not as much fun anyway.
The final result is a player that sounds like Analog at the push of a button. It is a tremendous bargain.