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Post by jeeperjk on Dec 5, 2021 23:05:04 GMT -5
 So the top driver is the midrange? Two lower are woofers and the ribbon between the mid and woofer? It would be odd for a DC issue to burnout a driver that has a series capacitor and not the woofers.
So does the amp still work?
Yes, the top one is the midrange. Amp still works. And I've hooked up a cheaper speaker to it and haven't had any hums or pops. That's one reason why I've been wondering IF any failure whether it could be happening at a certain temperature. Again, I'm not that technical to say whether that's even possible |
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Post by DavidR on Dec 5, 2021 23:35:55 GMT -5
Its NOT a DC offset issue.
Most music is in the midrange. I was unable to find a crossover schematic or any info on driver frequency ranges.
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Post by 405x5 on Dec 6, 2021 9:18:54 GMT -5
……too loud is TOO loud is the end of this story.
The best systems that can go all day as loud as your ears can stand it have many drivers incorporated.
Like so many voices, this allows for exuberant db levels with relative minimal stress on the individual drivers.
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Post by jeeperjk on Dec 6, 2021 10:02:36 GMT -5
Quite possible that is the case, but at this point it's still a theory imo, along with dc offset. The original question I had of whether the amp has built-in protection for a dc offset is still not answered.
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Post by Boomzilla on Dec 6, 2021 10:05:00 GMT -5
The amp still works properly = NOT the amp.
Drivers dead AND the amp still works properly = distortion killed the drivers & you played your music WAY too loud.
You can clip any amp if you try hard enough. The lower the wattage, the sooner the clipping. The more channels in the amp, the more likely the clipping (power supply capacity divided by number of channels).
If you want auditorium volumes, buy auditorium speakers & run them with "pro" amplifiers. Those big horn-loaded "pro" speakers come with their own protection and just won't burn out. Those "pro" amps also come with limiters that throttle back the amp output BEFORE distortion occurs.
At the levels you want to play at, buy yourself some Crown XLS series amps. They are cheap & durable, and their internal distortion and protection circuits will keep you from eating your speakers. Will they sound as good as Emotiva? No, but at that volume, who cares?
Boomzilla
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Post by Boomzilla on Dec 6, 2021 10:07:01 GMT -5
Quite possible that is the case, but at this point it's still a theory imo, along with dc offset. The original question I had of whether the amp has built-in protection for a dc offset is still not answered. The question is academic There IS no DC offset, otherwise the amp would burn up every speaker you hooked it to. This is clipping, pure and simple. |
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Post by jeeperjk on Dec 6, 2021 10:27:13 GMT -5
Just had a chat with Brent @ Emotiva, and he was super helpful... confirmed the amp has offset protection built in.
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Post by audiobill on Dec 6, 2021 10:54:44 GMT -5
High volumes also destroy hearing, so why bother with quality sound at
all?
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Post by jeeperjk on Dec 6, 2021 11:08:07 GMT -5
High volumes also destroy hearing, so why bother with quality sound at all? not sure what your point is. Same question reversed, if not playing on high volume, why buy a high powered amp?
"volume" as you referenced is a function of distance from speaker that your ears are. Didn't say anything about keeping my ears right up next to it or anywhere within 1m.
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Post by audiobill on Dec 6, 2021 11:15:52 GMT -5
To answer your question, a high powered amp like my McIntosh MC452 provides oodles of overhead for no distortion at moderate listening volumes. I rarely listen at more than 75 db in my 14,400 cu ft listening room.
McIntosh also limits power when distortion is detected to protect amp and speakers.
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Post by 405x5 on Dec 6, 2021 12:22:23 GMT -5
Generally speaking, speakers blow up in 2 different ways. Too much power or not enough.
A high power amplifier can be connected to almost ANY loudspeaker. The catch is; discretion is paramount. If you crank beyond the handling capability of the drivers you will find the cones in the middle of your living room LOL over excursion and mechanical failure.
A low power amplifier cranked beyond its ability to play without distortion burns the drivers out.
LOUD is the common with both scenarios
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Post by housetech on Dec 6, 2021 13:29:41 GMT -5
It's Not DC offset, too many people throw that term out there without knowing what it is. Here is how you find out if you have it- www.youtube.com/watch?v=RK53xnsvAEoBoom, 405x5 and DavidR are correct Bottom line, you're over driving the speakers, period. Blowing speakers is caused by the amp clipping (DC going to the speaker) and blown speakers be caused by the speaker impedance (Z) as the resistance changes during the 20hz to 20khz frequency range or the amp is starving for power from the power supply. I seriously doubt the XPA ran out of power. btw the preamp at "-6 db", omg, I don't remember running a preamp (or receiver) that high and I'm not afraid to crank it up. I worked as a sound tech for live concerts- I know what LOUD is. |
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Post by housetech on Dec 6, 2021 14:09:10 GMT -5
High volumes also destroy hearing, so why bother with quality sound at all? not sure what your point is. Same question reversed, if not playing on high volume, why buy a high powered amp?
"volume" as you referenced is a function of distance from speaker that your ears are. Didn't say anything about keeping my ears right up next to it or anywhere within 1m.
Having a high powered amp is for controlling the drivers so they don't distort and they usually have better dampening (reverse electromagnetic force). There are amps that have lower power (80-100w) that can control speaker drivers better than a 150w amp and they play almost as loud.. Higher power does result in higher db levels because they won't clip at those higher db levels, but clipping will destroy both amps and speakers. As they say, "just because you (it) can doesn't mean you (it) should." My pickup can go 120mph, but I don't want to be in when it is. You want LOUD, get more amps and more speakers. |
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Post by garbulky on Dec 6, 2021 16:25:49 GMT -5
Guys, minus 6DB is not that terrible. Y’all are acting like he is a party animal 🦇👻
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Post by doc1963 on Dec 6, 2021 16:38:29 GMT -5
Guys, minus 6DB is not that terrible. Y’all are acting like he is a party animal 🦇👻 But negative 6dB (which is already depleting digital headroom in his processor) combined with zero analog trim can equal who knows what…? Having an AV8805 myself, I do know that without properly trimmed channels when using that separate “2 Channel Mode” can produce music that is noticeably louder than what you would get when you carry over Audyssey’s trims or do them yourself using a meter. I suspect that the signal coming out of the preamp was already clipping and his amplifier can only magnify it. But of course, that’s just my opinion… 😎 |
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Post by housetech on Dec 6, 2021 17:24:59 GMT -5
Guys, minus 6DB is not that terrible. Y’all are acting like he is a party animal 🦇👻 lol, I can't disagree. (we never did stupid stuff  ) Here comes the "but", Doc's got a point. I'll never admit to what I did just last week, just- never try to "fix something" after an adult beverage.  |
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Post by DavidR on Dec 6, 2021 18:16:17 GMT -5
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Post by DavidR on Dec 6, 2021 18:23:15 GMT -5
Guys, minus 6DB is not that terrible. Y’all are acting like he is a party animal 🦇👻 I don't know about his gear but my XSP-1 G2 at -15dB with ERC3 and SA250 amp into a pair of AR9s is $^&#@#%^ LOUD (never went higher and normally don't go there)
If the OP wants to play loud he should go with a pair of 901s. Very insensitive to power applied and LOUD.
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Post by jeeperjk on Dec 6, 2021 18:48:02 GMT -5
It's Not DC offset, too many people throw that term out there without knowing what it is. Here is how you find out if you have it- www.youtube.com/watch?v=RK53xnsvAEoBoom, 405x5 and DavidR are correct Bottom line, you're over driving the speakers, period. Blowing speakers is caused by the amp clipping (DC going to the speaker) and blown speakers be caused by the speaker impedance (Z) as the resistance changes during the 20hz to 20khz frequency range or the amp is starving for power from the power supply. I seriously doubt the XPA ran out of power. btw the preamp at "-6 db", omg, I don't remember running a preamp (or receiver) that high and I'm not afraid to crank it up. I worked as a sound tech for live concerts- I know what LOUD is.
Thanks. Would be somewhat disappointed if that's the case (driving them too hard). Oh well... we live, we play, we break our toys, fix/replace and repeat.
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Post by leonski on Dec 7, 2021 0:06:55 GMT -5
In ALL your answers and reading has ANY mention been made of Compression?
Copper changes resistance at a known rate as it gets hot. It INCREASES.
I suspect you just burned UP the driver. DC offset on a driver with a capacitor? I don't know.....sounds.....fishy.
But simply too loud? Than speaker gets hot and you turn it up a little MORE?
Nothing wrong with your amp. Wrong speaker for what you want to do. Get some Cerwin Vega. They'll take anything......nearly...
Maybe some KLIPSCH from the Heritage line? You'll only need 100 watts per speaker to get kicked out of your town.....
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