My amp finally arrived and as promised I've returned to give a brief review of the 534B. As with most everything audio each users experience will vary. This is my first 300B SET experience, but frankly I can't imagine why anyone would spend more. Perhaps it was a plus possessing 96dB efficient speakers, but I spent an entire day listening, which I've not done in recent memory. The presentation was as natural sounding as I've heard. It probably doesn't hurt that the 534B is only having to drive the upper end of an open baffle design, and LF duty is covered by a pair of plate amps assigned to each speaker handling everything below 100Hz. I had all the volume one could ask for and more for a moderately sized room, and frankly didn't turn the control past the 10 o'clock position. It's well built, and much larger than I anticipated. I was thinking it would likely be a bit larger than my Prologue 5, but nooooo it's over twice that size and then some. This thing's a beast, and fills up the majority of a Salamander Designs amp stand. I've owned some pricey gear in the past, yet compared to the presentation and build quality of the product I'd heartily recommend running and not walking to snag one. It's the real deal, and I can't wait for the sun to rise so I can begin another listening day. I'd be the first to admit that I'd never had thought a product made in China would have me anxiously awaiting another listening session, yet that's clearly the case. Between PrimaLuna, Melody, and now GF, one doesn't have to mortgage the house to gain serious performance, nor do any of these products leave this listener feeling as if I'm lacking for more.
Enjoy!