[DavidHorn]

Yeah, well, it really surprised me as well. I think the amplifier shuts off (that's the pop) before it gets any hotter, and so protects the rest of the device.

I'll let you know on Monday how I get on - though in the UK it's certain I'll get a refund - all products have to be sold with a one year warranty and the retailer has to uphold that. If not, you tell your credit card company and they forcibly retrieve the money you paid and give you a refund.