Just received my Red Wine Teac today! First, it was just as carefully packed as I had sent it: doubled boxed, and the unit itself covered in the original Teac wrapper. Smaller chance of UPS screwing up!
As I unwrapped it, I saw the new switch on the front and flicked it. The blue light went on! Cool! The battery had a charge on it. I have never had an amplifier that you could turn on right out of the box, without plugging it in.
It's been playing less than an hour, so these are preliminary impressions. The bass is so much stronger... it sounds like a completely different beast. Plus the overall frequency balance is... more balanced. The tilted up response of the stock unit is virtually gone, although on some (very few) recordings (e.g. Patricia Barber) I can still hear slightly exagerated sibilants. But the detail is all there, with an exceptional clarity. I love it!
Thanks, Vinnie!