Thanks to drunk ADULT FEMALE, my Genz-Benz cab died in middle of gig last night.

#203
Killed_by_Death said:
Maybe a woman would have seen the pedalboard & not trampled on it, but alcohol was involved.
Wait, why was alcohol being served to a girl?




Ah, so it was a woman!
Lesson learned, block all oncomers from trampling your gear.

Hope you can get some drivers w/o breaking the bank.
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What does it matter if it were a girl, a woman or a rhinoceros? he is trying to get a problem fixed and did not ask who or what would more likely step on a box on the floor.
pglaser01 said:
Is this really the argument going on over 3 full pages?
#firstworldproblems

That is honestly the first time I've ever hash tagged something...
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Ridiculous huh? Talk about derailing a thread.
 
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#205
agedhorse said:
When I suggest appropriate power to be used with a speaker, this is in fact something that I do consider. It falls under the combination of "good common sense", and the ability to survive "momentary lapses of good judgement" and "accidents".

Generally, matching the "RMS" power handling of the cabinet to the rated "RMS" power of the amp will greatly improve the odds of surviving such "accidents", as many of the more robust amps can deliver more than 1.5x their rated "RMS" power under such "events".

There's not much of a tradeoff, as most speakers start exhibiting significant power compression at their "RMS" power rating anyway, and another benefit is that the speakers tend to last much longer when considering their overall lifespan.
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Power compression, I've never heard it called that but it describes overdriving a cab to a T, thank you agedhorse, stuff like this is one of the reasons i like having you pro's around, you learn a lot (even though I can still hear a low E fundamental through my SVTcab:roflmao:)
 
#208
Only invite seasoned pros that you know on stage.

Otherwise you risk your band's reputation, the ire of the club owner and obviously expensive damage. It's reported here so often as to perhaps stimulate caution.

I played with a guy who kept inviting people up or to the gig to sit in.
It was always horrible. He'd say he saw it all the time in blues clubs up north. I told him those folks know each other.
The real reason? He couldn't sing more than one set.
 
#210
bobyoung53 said:
Power compression, I've never heard it called that but it describes overdriving a cab to a T, thank you agedhorse, stuff like this is one of the reasons i like having you pro's around, you learn a lot (even though I can still hear a low E fundamental through my SVTcab:roflmao:)
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You are most welcome.

Since a couple of folks asked about this, let me explain a little more as it seems to be a commonly misunderstood topic...

In an ideal amplifier-speaker relationship, with a speaker that is say 100dB SPL output at 1 watt electrical input measured 1M away, if you put in 2 watts you would measure EXACTLY 103dB SPL. This would be a straight line graph of power in to SPL out.

What happens is that non-linear losses occur, losses that grow as power grows. This is normal, expected and designed for. so that same IDEAL speaker at 10 watts would be 110dB, at 100 watts would be 120dB and at 1000 watts would be 130dB. In actuality, with a real world speaker, 10 watts might be 109.5dB, 100 watts might be 117dB and 1000 watts might be 123dB. The difference between real and ideal is power compression, where the SPL scale is compressed relative to the power input.

In a typical speaker, power compression grows quite fast as Xmax is reached and gets exponentially greater beyond Xmax. Xmax is a mechanical property, which is why I am always talking about the mechanical limits of a speaker (and in fact include such specifications in the new Subway bass speaker products we have released). These mechanical limits have a direct impact on the SPL performance of your speaker system, where adding power beyond these limits adds very little real SPL to the speaker's output but greatly increases the chances for damage.

Hope this helps.
 
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#213
agedhorse said:
You are most welcome.

Since a couple of folks asked about this, let me explain a little more as it seems to be a commonly misunderstood topic...

In an ideal amplifier-speaker relationship, with a speaker that is say 100dB SPL output at 1 watt electrical input measured 1M away, if you put in 2 watts you would measure EXACTLY 103dB SPL. This would be a straight line graph of power in to SPL out.

What happens is that non-linear losses occur, losses that grow as power grows. This is normal, expected and designed for. so that same IDEAL speaker at 10 watts would be 110dB, at 100 watts would be 120dB and at 1000 watts would be 130dB. In actuality, with a real world speaker, 10 watts might be 109.5dB, 100 watts might be 117dB and 1000 watts might be 123dB. The difference between real and ideal is power compression, where the SPL scale is compressed relative to the power input.

In a typical speaker, power compression grows quite fast as Xmax is reached and gets exponentially greater beyond Xmax. Xmax is a mechanical property, which is why I am always talking about the mechanical limits of a speaker (and in fact include such specifications in the new Subway bass speaker products we have released). These mechanical limits have a direct impact on the SPL performance of your speaker system, where adding power beyond these limits adds very little real SPL to the speaker's output but greatly increases the chances for damage.

Hope this helps.
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I use an old early 70's SVT cab that's rated at 240 RMS, if I overdrive it with the head you can actually hear the compression, they become very distorted, obviously I try not and very rarely do overdrive it but if it's extreme as in that case you can actually hear it.
 
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#220
JimmyM said:
Ever play a gig that wasn't in an arena where the stage was roped off and guarded? I haven't.
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One of the more interesting gigs I played in recent years was in a commune in Devon that had been set up in some old stately home... we played in the drawing room which had panelled walls and ornate sculptured ceiling above the chandeliers. Pianist/singer got to use the Steinway and needless to say I didn't bring an 8x10. The audience were sat on hand-embroidered cushions in touching distance of the band. Btw when I say "commune" this was the kind of commune where everyone is called Tarquin or Fenella or similar and talks about daddy's yacht in Juan-les-Pins and if they're going to Verbier this winter, but anyway no arena and no roped-off stage area :)
 
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