I am waiting on a built-to-order GES (3 weeks now) and am using a demo unit that Jack had.
He does indeed offer a balanced input option, which I almost bought, but I don't really have the cash flow to fund the upgrade. He has to add another row of tubes and make the chassis about 2 inches longer to accomodate them.
I did get a Sennheiser jack added on but was told, that unlike the 007t which is a hybrid amp (not point to point wiring) that the GES can't handle 2 headphones at the same time, so if I want switch from Omegas to the HE-60's, I'd have to shut off the amp, switch headphones and then wait for the new headphones stators to warm up. It would just be better to use a different pair of headphones each listening session.
I never realized the "warm-up/volume" situation, but it does make perfect sense, because when I listen to them after 15 minutes, I have to turn the volume up to 1 o'clock...but when I turn it on and listen a couple of hours later (not on purpose, it's just that life gets in the way sometimes) it is one of the sweetest amps I've ever heard and the volume is suitable at 11 o'clock.
When I spoke to Jack about this, he offered to increase the gain for me.
I was listening to "The Best of Eddie "Lockjaw" Davis" last night before bed and I was truly impressed with the sound quality. It had been on for about 4 hours.
I guess that since electrostat headphones take a while to warm up before the sound their best, then waiting for the amp to warm up isn't that big a problem.
Enjoy your new toy and thanks for the review!
I have the GES prototype here with me right now, and it is nice with my HE60 and SR-Lambda Signature (an upgrade over my SRM-1 Mk2 Pro). I have a new GES current production being built. I have only a few days to decide if I should go maxed or not, but I don't know that I can afford to do the upgrades.
Can you tell me how much better the base-model GES was over the prototype, and re-assure me that it will be a noticeable upgrade over the prototype without having to spend another $680 to max out the GES?