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#383077 - 09/21/12 03:22 PM Real Newb Question
Diamondog Offline
veteran

Registered: 12/22/09
Posts: 105
My question is this: I have always had a problem blowing speakers by playing them too loudly. Can anybody tell me how loud I can play based on the hardware I am using. I am not technical at all when it comes to this stuff.

Setup
Denon 4308
M80 v2
VP150 v2
EP500 v2
QS8 v3
10, 12 or 14 gauge speaker wire, can't remember what I used, no length longer than 25ft

When I want to listen loud I stay at -8db, thats not to say I wouldn't want to play louder if I could...thanks!



Edited by Diamondog (09/21/12 03:24 PM)
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Sharp Aquos LC60LE650U/Onkyo TX-NR5010/Axiom M100/Axiom VP150 v2/Axiom EP500 v2/Axiom QS8 v3

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#383079 - 09/21/12 03:24 PM Re: Real Newb Question [Re: Diamondog]
Ken.C Offline
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Registered: 05/03/03
Posts: 17781
Loc: NoVA
If you blow those speakers with that setup, you're truly skilled. The only question I would ask is if you're running the M80s as large or full band.
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#383080 - 09/21/12 03:25 PM Re: Real Newb Question [Re: Ken.C]
Diamondog Offline
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Registered: 12/22/09
Posts: 105
Originally Posted By: Ken.C
If you blow those speakers with that setup, you're truly skilled. The only question I would ask is if you're running the M80s as large or full band.


Large or full band? Do you mean a setting within the receiver?
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Sharp Aquos LC60LE650U/Onkyo TX-NR5010/Axiom M100/Axiom VP150 v2/Axiom EP500 v2/Axiom QS8 v3

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#383081 - 09/21/12 03:26 PM Re: Real Newb Question [Re: Diamondog]
Ken.C Offline
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Registered: 05/03/03
Posts: 17781
Loc: NoVA
Yes, as in you're sending all frequencies to any of your speakers rather than letting the sub handle stuff below, say 80Hz. Or 40 Hz, whatever.
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#383082 - 09/21/12 03:30 PM Re: Real Newb Question [Re: Ken.C]
Diamondog Offline
veteran

Registered: 12/22/09
Posts: 105
Originally Posted By: Ken.C
Yes, as in you're sending all frequencies to any of your speakers rather than letting the sub handle stuff below, say 80Hz. Or 40 Hz, whatever.

Just had a quick look, looks like set to large for the M80's
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Sharp Aquos LC60LE650U/Onkyo TX-NR5010/Axiom M100/Axiom VP150 v2/Axiom EP500 v2/Axiom QS8 v3

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#383083 - 09/21/12 03:31 PM Re: Real Newb Question [Re: Diamondog]
Ken.C Offline
shareholder in the making

Registered: 05/03/03
Posts: 17781
Loc: NoVA
Yeah, so you're putting a lot of extra load on your receiver. I'd try it with the 80s set to 40Hz, the 150 to 80, and the QS8s to 80. See how that sounds.
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#383085 - 09/21/12 03:51 PM Re: Real Newb Question [Re: Ken.C]
Diamondog Offline
veteran

Registered: 12/22/09
Posts: 105
Thanks
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#383094 - 09/21/12 05:14 PM Re: Real Newb Question [Re: Diamondog]
Boltron Offline
veteran

Registered: 11/18/11
Posts: 171
Loc: Toronto
The most common cause of blown speakers is clipping. Your speakers may be rated at way more (2x,3x) power than your amp and you can still easily blow them.

If you set you volume to high when playing content with high dynamic range typically action movies, the spikes will easily exceed the limit of the output stage and cause it to clip. When the signal clips, you get DC current. DC is fatal to speakers. An amplifier of say 80 watts can easily fry a 400 watt M80 if it clips excessively.

Because you say you have blown many speakers, you are setting the volume too high. With the sound dynamics movies produce today, if your receiver is set to full dynamic mode (i.e. not night, evening etc...), you should really not be setting the volume more than about 1/3 (just a guess). Your Denon has Audyssey, try enabling dynamic volume and set it to evening mode, which should tame the spikes so you can do a general volume increase.

Or you can be a maniac like me and get an ADA1000 or other good amp to drive the fronts and even center. I have a Denon 4311CI and I use 3 channel ADA1000 my M80s and VP150.
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#383113 - 09/21/12 07:45 PM Re: Real Newb Question [Re: Boltron]
tomtuttle Offline
axiomite

Registered: 06/20/03
Posts: 8290
Loc: Tacoma

This.

Originally Posted By: Boltron
The most common cause of blown speakers is clipping...


If it sounds distorted, turn it down. The only way you're likely to damage the speakers is by driving your amp beyond its ability to play cleanly. Which should be loud enough to cause hearing damage.
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#383129 - 09/21/12 11:29 PM Re: Real Newb Question [Re: Diamondog]
JohnK Offline
shareholder in the making

Registered: 05/11/02
Posts: 10395
DD, quality speakers such as your M80s can't be blown simply by playing them too loudly. Your ears would give out well before the speakers would. What could possibly happen would be damage resulting from the amplifier clipping if it couldn't supply the power needed.

Looking at your hardware, it clearly is capable of sound levels beyond what's safe to your hearing. If you're speaking of a movie at -8dB, if your setup is correctly calibrated that equates to about 97dB(the max peak in a movie channel is 105dB). This peak would require about 20 watts for the M80, so louder would be possible, but most listeners, including me, consider that to be loud enough for home listening.
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