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#123642 - 01/09/06 07:14 PM Bi-amping M80ti Speakers does work!
Richie Offline
veteran

Registered: 01/06/06
Posts: 137
Loc: IL, USA
I had written in an earlier post that I was going to bi-amp my front M80ti speakers. The Denon 3805 I have is a 7.1 channel AVR that I am using in 5.1 channel mode (because I don't have space for 7 speakers!). The unused two back channels are now being used to drive the woofers in the M80ti towers. And on the Denon 3805 I can adjust the levels of the woofers separately from the that of the tweeters! That's pretty cool! I can immediately hear the difference in the sound.

I know this is not rocket science, but I am happy!
_________________________
4 M80s/VP150/EP600/Denon AVR-5308 & DVD-2910/
2 QSC SRA3622(1100wattsX2)/Carvin 1800HD(600wattsX2)

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#123643 - 01/09/06 08:21 PM Re: Bi-amping M80ti Speakers does work!
thyname Offline
aficionado

Registered: 04/05/05
Posts: 552
Loc: Oakton, VA
Oops!! Somebody is going to be very skeptical on your findings on bi-amping here...
_________________________
Axiom M60s, QS4s, VP100 Onkyo TX-SR804 Oppo 970HD Rotel RB-1080/RCD-1072 REL Q150E sub, PS 3

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#123644 - 01/09/06 10:21 PM Re: Bi-amping M80ti Speakers does work!
pmbuko Offline
shareholder in the making

Registered: 04/02/03
Posts: 16280
Loc: Leesburg, Virginia
thyname, not necessarily true. If the biamping results in a different signal level going to the tweeters than to the woofers, then a noticeable difference in sound is not unexpected.

When biamping however, unless you're using an external crossover and have disabled the internal crossover, you should really take care to send the same signal to both sections of the speaker. Otherwise you're negating all the careful research that has gone into making the M80s such accurate performers.
_________________________
"I wish I had documented more…" said nobody on their death bed, ever.

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#123645 - 01/09/06 10:36 PM Re: Bi-amping M80ti Speakers does work!
thyname Offline
aficionado

Registered: 04/05/05
Posts: 552
Loc: Oakton, VA
Let us ask Richie: has he disabled the internal crossover at his Axioms?
_________________________
Axiom M60s, QS4s, VP100 Onkyo TX-SR804 Oppo 970HD Rotel RB-1080/RCD-1072 REL Q150E sub, PS 3

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#123646 - 01/09/06 10:41 PM Re: Bi-amping M80ti Speakers does work!
Richie Offline
veteran

Registered: 01/06/06
Posts: 137
Loc: IL, USA
Uh..No...I have not disabled the internal crossovers in my Axiom M80ti's! I only followed the directions given here:

http://www.audioholics.com/productreviews/avhardware/Denon-AVR3805_review04.php

So, what exactly have I done? :-)
_________________________
4 M80s/VP150/EP600/Denon AVR-5308 & DVD-2910/
2 QSC SRA3622(1100wattsX2)/Carvin 1800HD(600wattsX2)

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#123647 - 01/09/06 10:43 PM Re: Bi-amping M80ti Speakers does work!
Richie Offline
veteran

Registered: 01/06/06
Posts: 137
Loc: IL, USA
I think I am sending the same signal to both sections of the M80ti Speakers.
_________________________
4 M80s/VP150/EP600/Denon AVR-5308 & DVD-2910/
2 QSC SRA3622(1100wattsX2)/Carvin 1800HD(600wattsX2)

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#123648 - 01/09/06 11:00 PM Re: Bi-amping M80ti Speakers does work!
Richie Offline
veteran

Registered: 01/06/06
Posts: 137
Loc: IL, USA
I think what I am doing is referred to as passive bi-amping. I saw it defined like this in an earlier post on this site:

<<<Passive bi-amping refers to running two amplifier channels in parallel without an external crossover. For this, you leave the internal speaker passive crossovers intact. This offers the benefit of increasing total power, but basically nothing that will significantly affect the sound quality.>>>
_________________________
4 M80s/VP150/EP600/Denon AVR-5308 & DVD-2910/
2 QSC SRA3622(1100wattsX2)/Carvin 1800HD(600wattsX2)

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#123649 - 01/09/06 11:07 PM Re: Bi-amping M80ti Speakers does work!
Wid Offline
axiomite

Registered: 06/22/03
Posts: 6720
Loc: The Peoples Republic of Il.
In reply to:

And on the Denon 3805 I can adjust the levels of the woofers separately from the that of the tweeters! That's pretty cool! I can immediately hear the difference in the sound.





It does seem to me that you are altering the sound of the M80s. I assume you have adjusted the woofers of the 80s to receive a stronger signal than the mids and highs. What you have now would be rise in the upper to low bass region. You could also achieve somewhat of the same effect just using the tone controls, or bumping up the sub a few notches.

I'm not saying what you have done is either good or bad. If you like the results then what can I say.

_________________________
Rick


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


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#123650 - 01/09/06 11:16 PM Re: Bi-amping M80ti Speakers does work!
Wid Offline
axiomite

Registered: 06/22/03
Posts: 6720
Loc: The Peoples Republic of Il.
In reply to:

This offers the benefit of increasing total power, but basically nothing that will significantly affect the sound quality.



This passive biamping you are talking about does not increase the power going to the speaker. When you leave the binding post straps in place the upper and lower part of the M80 is getting the same amount of power. When you remove the strap and biamp like you have the lower and upper part is sill getting the same rated power.

_________________________
Rick


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


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#123651 - 01/09/06 11:16 PM Re: Bi-amping M80ti Speakers does work!
thyname Offline
aficionado

Registered: 04/05/05
Posts: 552
Loc: Oakton, VA
In reply to:


Uh..No...I have not disabled the internal crossovers in my Axiom M80ti's! I only followed the directions given here:




That is what I thought. Who would take the bother to move the internal crossovers of the speakers, unless one is a technician or something...

This is a very contraversial topic. While there are people who have tried it and liked the results, there are others that never tried it and still claim that achieves nothing. I always think that it is up to the people to decide what's good for them.
_________________________
Axiom M60s, QS4s, VP100 Onkyo TX-SR804 Oppo 970HD Rotel RB-1080/RCD-1072 REL Q150E sub, PS 3

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