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Re: back ported axiom speakers
terzaghi #212981 06/25/08 05:27 PM
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 Originally Posted By: terzaghi
I have my m80's about 8 inches from the wall.


I guess 8" is enough room for some men...


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Re: back ported axiom speakers
Hutzal #212987 06/25/08 05:49 PM
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8" here. \:\)


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


Re: back ported axiom speakers
SirQuack #212989 06/25/08 05:55 PM
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hey, not all of us have 20" to play with like rbr


-David
Re: back ported axiom speakers
terzaghi #212995 06/25/08 06:21 PM
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 Originally Posted By: terzaghi
hey, not all of us have 20" to play with like rbr


20" must be a PITA ;\)


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Re: back ported axiom speakers
Hutzal #213003 06/25/08 06:50 PM
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4' here, but I have a mancave so...


Fred

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Blujays1: Spending Fred's money one bottle at a time, no two... Oh crap!
Re: back ported axiom speakers
rbr #213052 06/26/08 01:25 AM
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RB, welcome. As far as the rear ports go, the only requirement is to give them some "breathing room", and about 3" would be enough for that.

A more significant placement measurement would be to have the distances from the front wall, side wall and floor to the middle of the woofer cone unequal, if possible. The reason for this is so that the peaks and valleys caused by reflections from the room surfaces don't all pile up at the same frequencies.


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Enjoy the music, not the equipment.


Re: back ported axiom speakers
JohnK #213379 06/27/08 11:08 PM
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What about the ceiling? The distance to the ceiling not equal to the floor, front and side walls is what you mean right? Also, I thought that you were supposed to make sure that those four distances aren't even divisible by one another. It seems like this would require a little bit of time since the m60's and m80's have 3 and 4 woofers respectively. My head hurts just thinking about it.

- Nick

Re: back ported axiom speakers
Nick B #213407 06/28/08 02:53 AM
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Yeah, Nick; theoretically the ceiling should also be taken into account, but it usually isn't considered, since it would be very unusual to have a placement where the distance of the woofer cone to the ceiling was identical to the distance to the floor and both walls.

No, the evenly divisible lengths factor applies to the size of the room and the resulting modes. The reflections from the nearest room surfaces are a completely separate effect.


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Enjoy the music, not the equipment.


Re: back ported axiom speakers
Ken.C #214859 07/09/08 11:48 PM
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Why does Axiom M60 and M80 have 3 ports (two rear and one front)compared to other speakers which only have one or two in the rear? And why doesn't the VP150 doesn't have a port? Just curious...

jj


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Re: back ported axiom speakers
CooLJ92 #214861 07/10/08 12:09 AM
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The M60 are bigger with more drivers. IIRC the tweeters, midranges, and woofers are segregated by internal bracing, which would seem to come into play.

As for the VP150, many people will place it inside a cabinet or stand of some sort, so it's designed for different constraints, eg. not being able to assume that there's room for a rear port to breathe.

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