2. amps-preamps
  3. 1137482455

Sound tripping at "not loud enough" volumes

Hi,

I need more volume...and I know that the amps and speakers can do it...but....

I am using audiolab 8000P series stereo amps, being bi-wired, and bi-amped from a 8000C audiolab prepamp and a sony CD transport.

These are driving NHT 2.3 speakers. with (quite old now) midnight blue cables.

My problem, is that when I get the amps up to around 7 oclock, the mid/treble amp trips and all I am left with is the bass amp working. After turning the mid/treb amp down a bit, and waiting about 3-4 seconds, the amp comes back in again.

I have tried switching the power amps, but it is always whichever amp that is serving the mid/treble range that trips....so presumably not the power amps.

Any clues guys, as even although 6 oclock is quite loud...I REALLY NEED to get the dial up there some times and shake the roof off!

Cheers
caitchison94db

Showing 1 response by beavis

beavis
272 posts
 
I second Bignerd100's analysis. Think your speakers are presenting an abnormally low load (like 1-2 ohms) to amplifier in mid/treble. The amp then runs out of gas & shuts itsef down to avoid "hard" clipping or the speakers have a protection circuit which shuts your speakers down until voice coils can cool off sufficiently to continue.

Speaker mfrs., in general, specify only a nominal ohm load rating, ignoring the minmum load rating which is what the amp sees.

If running multiple sets of speakers at same time, run only one set and/or buy a speaker selector that won't pass an extremely low load like 4 ohms minimum, which most modern amps are capable of.
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