I only have a few hours on the '57 so far. Warming up for this coming Sunday morning, so I will be putting a lot of hours on it this week. No glitches like you describe yet. I will keep an eye out for it. The '57 is not quite as loud as the '65. That was the reason I went with the '65 before. I wasn't sure how much volume I would need, but now I think the '57 will be loud enough. Two weeks ago I was running the preset volume around 5 on the '65 (with master volume on 10) and that was as loud as I will need. The '57 needs about 8 on the preset to get the same volume. It should be fine, and I like the added low end on it.