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In Reply to: RE: System for DJs question posted by smcdonie@uwsp.edu on November 10, 2008 at 08:39:17
The driverack kept its settings but was baffling to me was during the show one of the four enclosures the high frequency was still working. But the next day I checked all the enclosures in full range and biamp mode and they all worked. So that kills the amp protection mode theory.
The enclosures are Peavey SP1Gs which I switched out the phone plugs for speakons and had a toggle mounted for fullrange or biamp operation like on their DTH series. These speakers have the original SoundGuard HF protection (a thyristor in the circuit board) and has not been modified.
Again, I've used these cabs for about 10 years (7 after being modified) and they have never let me down.
Follow Ups:
Ah there is the probable culprit
You heated the circuit and the thermal protection kicked in on the
compression drivers with the passive xover circuit
Good thing
:)
Try using more compression and set your limiter threshold so it
kicks in sooner
If your really pushing that thing at high output try a 10:1 ratio
and make sure you limit it as well
I think you're right.
Thank you.
I did live sound re-enforcement for over twenty years on my rig and as house tech at several venues. Whenever a DJ wanted to plug into my system I would ask him to keep a 'handle' on his levels. Invariably all the DJs would keep turning it up as the night grooved on and I would constantly have to clamp down on the trim in his inputs on the mixer.
I realize things have changed with the gear as much of it is digitally controlled and processed to the nines but some things still hold true. If he is clipping the trim on the console or any input, the resulting signal will send a nasty spike into your compression drivers and even if the input to the driver is within acceptable limits it will damage the diaphragms or trip the breakers/fuses.
I suggest you monitor the input or place a compressor/limiter on the DJs feed before it enters your gear. BTW: Never, ever use slow-blow fuses on loudspeakers. By the time they blow the damage is already done. Slow blow fuses are for power supplies, period.
Hope I helped
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