Roland Rock Posted January 18, 2014 Share Posted January 18, 2014 If I had a solid state head which delivered full power at 2.7 ohms, would I break it if I connected it to two 4ohm cabs? I know that the 2.7 is to allow 3x8ohm cabs, but just wondering about the possibilities. I'm hoping that the answer is 'don't do it' for the sake of my bank account ;-) Quote Link to comment Share on other sites More sharing options...
xgsjx Posted January 18, 2014 Share Posted January 18, 2014 As BFM pointed out to me, think of it like redlining your car. What happens if you run into the red for a sustained period? Some cars can handle it for a period, most blow the head gasket. Quote Link to comment Share on other sites More sharing options...
JapanAxe Posted January 18, 2014 Share Posted January 18, 2014 (edited) It's all to do with the heat generated in the power amp. If you do this at home levels, it'll probably be OK. If you gig it and turn up the wick, either your amp will burn out a power transistor, or some protection device will come into play and switch it off for you. There is also a legend, passed down through the centuries in whispered conversations between bass players in dark and dingy corners of pubs, that any Peavey solid state amp will happily run into half its rated impedance. But that's just a myth. Edited January 18, 2014 by JapanAxe Quote Link to comment Share on other sites More sharing options...
Roland Rock Posted January 18, 2014 Author Share Posted January 18, 2014 I'm not sure how much it would need to be cranked, tbh, being a 1000w amp into a 6x10 and a 2x12. It would be doing it just because I can! I knew in my heart that it would not be a sensible thing to do :-D Quote Link to comment Share on other sites More sharing options...
chris_b Posted January 18, 2014 Share Posted January 18, 2014 You must be talking about TC. They are the only heads I know of which run to a recommended max of 2.7, which is an odd number because most amps will be 4 ohm or 2 ohm. TC say they are designed to run 3 8 ohm cabs. Maybe they can run at 2 ohm but TC think it's marginal. You could try it at low volume but high volume, where the excessive heat is generated, might cause the amp to go into Protect mode .Read the manual. There is info about the Protect mode. Quote Link to comment Share on other sites More sharing options...
Roland Rock Posted January 18, 2014 Author Share Posted January 18, 2014 [quote name='chris_b' timestamp='1390053131' post='2340920'] You must be talking about TC. They are the only heads I know of which run to a recommended max of 2.7, which is an odd number because most amps will be 4 ohm or 2 ohm. TC say they are designed to run 3 8 ohm cabs. Maybe they can run at 2 ohm but TC think it's marginal. You could try it at low volume but high volume, where the excessive heat is generated, might cause the amp to go into Protect mode .Read the manual. There is info about the Protect mode. [/quote] Cheers, actually I'm looking at the Glockenklang Heart Rock II, and you're right that the 2.7 is designed for 3x8ohm cabs. I suppose if I couldn't crank it, there wouldn't be much point. I'd be better sticking with the EBS HD350 with its 2ohms. It's not like I'll be lacking in volume :-D Quote Link to comment Share on other sites More sharing options...
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