Will this hurt a class d amp?

[dopey 0]

???

[JimJ 11]

It shouldn't...I've heard of a few solid state amps that have problems with that, but none that have been built recently...

[platnum accord 0]

no load with no signal? wouldnt that be bad if there was a signal.

[stevew007 0]

some amp's do have problems with that. a friend of mine had is z1 burn up because there was no woofer's hooked to it! BUT the older z1's had that problem. do you want to find out if your's has it???

[ANeonRider 3]

no load with no signal? wouldnt that be bad if there was a signal.

Umm... there will be a signal with no load on every single amp.

When the Class D amplifiers first started to become mainstream, there may have been issues with the feedback circuitry burning up with no load... but I do not see that as an issue now.

[30hurtzaudio 0]

I was just always told it was a bad for it (the amp "seen" an extremely low impedence) so i never tried it and dont really see a need to. better safe then sorry no need to burn up a good amp...I dont have that kind of money....

[ANeonRider 3]

It's seeing an infinite impedance when there is no load...

[JimJ 11]

(the amp "seen" an extremely low impedence)

An open load is more of an infinite impedance, a dead short is an extremely low impedance.

[30hurtzaudio 0]

so i had that part backwards? not that i am arguing the point with u i just want to know.

[ANeonRider 3]

Yep, completely backwards.

[30hurtzaudio 0]

well thanks i am always learning something off u guys...

[platnum accord 0]

me too.

[dopey 0]

So...

100% it's not a problem?

[sundownz 197]

No problem... at least not on the 1500Ds... I have them idling quite often with no load.

[UNIT 6639 0]

When you guys say no load, do you mean the amp being on with no sub hooked to it. I sometimes pull my sub out when i need to use the trunk, is it bad for my amp to be running with no sub hooked to it??

From what I gather reading this thread, its not!

[Adrian_D 520]

wouldn't hurt to remove the remote cable when you remove the sub

[dopey 0]

For any of you geetar players out there...

NEVER I repeat NEVER, UNDER ANY CIRCUMSTANCES, so much as turn a tube amp on, without it seeing an active load.

Tube amps are VERY finicky about that...and you will blow an output tranny so fast it'll make your head spin.

When I say tube amps, I mean amps with tube OUTPUT stages...USAmps TU series doesn't qualify. But they may blow with no load too. (Some think they blow nowadays anyway)

[JimJ 11]

(Some think they blow nowadays anyway)

teehee

Yep...not having any load on the secondaries of the OPT's, combined with a very high output impedance and little to no negative feedback, results in a lot of voltage building up on the primary windings...even with the best transformers, that's going to arc over to the secondary and damage things. And since good transformers are most of the cost (and weight) of the amp, you really don't want that happening.