Busted Accuphase M-60 Monoblock.

**User211** · 03-03-2019, 12:06

Plugged in the Accuphase M-60s last night.

To be frank, I haven't run them since my DAC was upgraded. That's quite a few months ago.

So enamoured with how absolutely brilliant they were sounding with the newish DAC revisions (I never remember them sounding this good), I ran them for an extended period, probably three hours, quite regularly seeing the power output entering the 0.5 Kilowatt zone.

At 11:15 the wife came in saying 'turn it down', so I did. Both amps still running at this point.

Then I went out to make a cup of tea, came back in and one no worky. No smells. But the chassis were ridiculously hot in both.

Amp in question just doesn't switch on this morning. It isn't the plug fuse. I had hoped some sort of thermal protection had kicked in.

Any offers for the most likely cause of damage?

Wife says I had them turned to 11 and a half and they don't go to 11 and a half.

It was idiocy on my part. I am fully aware they get too hot at that volume for such an extended period. But the bottle of wine in me said 'nah it'll be alright'

These amps are the first monoblocks Accuphase ever made (1975). They are worth something. I have no intention of selling them.

**User211** · 03-03-2019, 12:17

Panic over. There's a push in button at the back that had moved out on one of them. Thermal protection trip switch? I dunno, but it comes on.

They are fine

Mods feel free to delete the thread.

**jandl100** · 03-03-2019, 12:40

Justin playing music at eleven and a half, shock?

Yeah, I can believe that!

**mikeyb** · 03-03-2019, 12:42

Think this thread should be left up as a warning to would be neighbours

**jandl100** · 03-03-2019, 12:43

half a kilowatt.

**User211** · 03-03-2019, 12:51

Sorry, I can't hear anything you guys are saying

**mikeyb** · 03-03-2019, 12:52

Originally Posted by User211

Sorry, I can't hear anything you guys are saying

I can believe that

**jandl100** · 03-03-2019, 12:55

**Clive** · 03-03-2019, 13:02

500W....nah that's kids stuff. Even 1.8kW into my bass drivers isn't that impressive when a pal is using 3.6kW. It's not that I can't hear much with all the bass pressure, it's more that my innards are scrambled.

**walpurgis** · 03-03-2019, 13:16

Hmm. I've found 8 watts ample in the past!

Thread: Busted Accuphase M-60 Monoblock.

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