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Re: The M80's just got here....the AMP will not work
bobt #346804 05/01/11 05:42 PM
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Doesn't exactly win on the morality front, though, does it?

You're not taking a few minutes to try the suggestions people are taking the time to offer to you, and you have no problem buying a piece of equipment, frying it, then lying about it when you return it?

There's IS something defective here, but I'm no longer sure it's the wiring of the speakers.


::::::: No disrespect to Axiom, but my favorite woofer is my yellow lab :::::::
Re: The M80's just got here....the AMP will not work
MarkSJohnson #346805 05/01/11 05:50 PM
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the reason we are asking to check one speaker at a time is to determine if one of the speakers is causing the problem, or one of the amp channels.


M80s VP180 4xM22ow 4xM3ic EP600 2xEP350
AnthemAVM60 Outlaw7700 EmoA500 Epson5040UB FluanceRT85


Re: The M80's just got here....the AMP will not work
bobt #346806 05/01/11 05:59 PM
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It looks like you're not understanding some of the previous posts and how your equipment works. Why do you think Onkyo designed the amp to shut itself off? To protect the speakers?


Bruno
M80s/VP180/QS8s/EP600/AVR-890
------------------------------------
"The problem is choice..."
Re: The M80's just got here....the AMP will not work
bdpf #346807 05/01/11 06:00 PM
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Originally Posted By: bdpf
It looks like you're not understanding some of the previous posts and how your equipment works. Why do you think Onkyo designed the amp to shut itself off? To protect the speakers?


Exactly, you will not blow that amp up. It will protect itself.


Rick


"A fear of weapons is a sign of retarded sexual and emotional maturity." Sigmund Freud

Re: The M80's just got here....the AMP will not work
bobt #346809 05/01/11 06:26 PM
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Quote: "J Bellemare, that was the exact amp i was considering. If you say it will push the M80's...to LOUD volumes,(like concert volume) with no problems. Plus you really don't hear a difference between it and your old Hafler..works for me."

if you do the maths, you will see that an M80 fed with a GX5's full power will do extremely high SPL's and if you try it, it might make your ears bleed.
The GX5 can put out about 700-800 Watts in a 4 Ohm load; way more than you will ever need in a room.

room efficiency for the M80 is 95dBSPL/1W/1m
10 Watts = 105dBSPL @ 1 meter
100 Watts = 115dBSPL @ 1 meter.

At 2 meters, subtract about 3 dB from those numbers above; and
at 4 meters, subtract another 3 dB.
using 2 speakers, add 3 dB to those numbers.

Remember that movies have a max SPL of about 105.
115 dBSPL is the max. for the LFE channel (low frequencies).

Very loud peaks in classical music will reach about 112-115 dBSPL.


Last edited by J. Bellemare; 05/01/11 06:30 PM.
Re: The M80's just got here....the AMP will not work
MarkSJohnson #346811 05/01/11 06:37 PM
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OK...just tried the Advents...at insane volume.(well over 50 watts easy) Played the same source CD. Same songs. Everything works fine.

The reason, i chose the QSC, number 1. I really expect it to work. My gut says the old Onkyo, just can't handle the 4 ohm load right. But also the QSC has better protection circuits, then a 1980's vintage amp. IF the M80's throw the QSC into protection, and shut down. Then for sure there is a problem with them, and need to be sent back. That amp was designed from the ground up to handle 4 ohm loads. Any REAL chance of frying the QSC, is pretty much nil. But to do anymore tests with a vintage amp, that in fact could damage it, i'm just not willing to do.

Normally 1 bad driver in a speaker, will just POP. A shorted one or one with a bad voice coil, will just not play. But thats not the case here. At least from what i can see. All drivers are moving, except for the tweeters, which i can't tell. They will play on the amp, There is no dead short, as the amp would shut down right away. The chance of the speakers shorting out at high volume levels....i would think is pretty remote. I've never seen that before, but dosen't mean it could not happen.

Re: The M80's just got here....the AMP will not work
bobt #346812 05/01/11 06:45 PM
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No, i understand what your saying completely. But again, this is a vintage amp..how many times can you throw it into protection mode with out some type of damage.

Re: The M80's just got here....the AMP will not work
bobt #346813 05/01/11 06:48 PM
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Good luck with your new amp.


Bruno
M80s/VP180/QS8s/EP600/AVR-890
------------------------------------
"The problem is choice..."
Re: The M80's just got here....the AMP will not work
bdpf #346814 05/01/11 07:12 PM
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OK, my 2cents
And to go along with quack, MJ and such it could be a bad speaker try, testing one at atime
Put a Voltage tester on the terminals see if there's continuity, see if thees a short internally. Maybe, one of the wires came loose, maybe it even fell off and is now shorting out within.
Maybe they we're drinking the night before and hooked it up in Serial. there's only four screws per driver nothing to it to check them out


Pioneer sc-1525
M80 HG Cherry
Re: The M80's just got here....the AMP will not work
axiom_man #346816 05/01/11 07:36 PM
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I "assume" you mean check the ohms? As to check the continuity?

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