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#338552 - 02/15/11 01:58 PM 3dB frequency point of my M3's?
Emzdogz Offline
veteran

Registered: 10/30/09
Posts: 110
Hello, how can I find out what that would be?
Was recommended as a starting point for setting my sub.

thx!
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#338553 - 02/15/11 02:00 PM Re: 3dB frequency point of my M3's? [Re: Emzdogz]
Ken.C Offline
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Registered: 05/03/03
Posts: 17695
Loc: NoVA
I would guess that could be derived from this graph:

This is from Axiom's product page for the M3s.
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#338557 - 02/15/11 02:09 PM Re: 3dB frequency point of my M3's? [Re: Ken.C]
CatBrat Offline
axiomite

Registered: 08/05/09
Posts: 5646
Loc: Some random location
From looking at this graph, I would say that 150hz would be the best choice.

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#338558 - 02/15/11 02:15 PM Re: 3dB frequency point of my M3's? [Re: CatBrat]
Ken.C Offline
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Registered: 05/03/03
Posts: 17695
Loc: NoVA
I would never cross a sub that high.
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#338559 - 02/15/11 02:18 PM Re: 3dB frequency point of my M3's? [Re: Ken.C]
MarkSJohnson Online   happy
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Registered: 09/27/04
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And I don't see 150Hz as being a -3dB point in that graph anyway...
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#338562 - 02/15/11 02:20 PM Re: 3dB frequency point of my M3's? [Re: Ken.C]
SirQuack Offline
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Registered: 01/29/04
Posts: 13309
Loc: Iowa
Looking at the specs the +/- 3dB point is 60hz, however, I would follow normal practices and start around 80hz or possibly a bit higher.
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#338563 - 02/15/11 02:22 PM Re: 3dB frequency point of my M3's? [Re: SirQuack]
Emzdogz Offline
veteran

Registered: 10/30/09
Posts: 110
OK, thanks - I had it set around 70 anyway...so I guess I was in the ballpark.
smile
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Tampa, FL

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#338564 - 02/15/11 02:27 PM Re: 3dB frequency point of my M3's? [Re: Emzdogz]
CatBrat Offline
axiomite

Registered: 08/05/09
Posts: 5646
Loc: Some random location
150 still looks like where +3db starts. I would try here to see what it would sound like to eliminate that bass hump. Then adjust downward if it didn't help. This would make the subwoofer reproduce directional bass though.

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#338569 - 02/15/11 02:32 PM Re: 3dB frequency point of my M3's? [Re: CatBrat]
BlueJays1 Offline
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Registered: 09/19/08
Posts: 4056
Loc: Porch,enjoying Bombay Sapphire
80hz or 100hz is ideal. The M3 connoisseur (2X6spds) on these forums likes his crossed at 100hz used with a subwoofer.
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#338570 - 02/15/11 02:33 PM Re: 3dB frequency point of my M3's? [Re: CatBrat]
MarkSJohnson Online   happy
shareholder in the making

Registered: 09/27/04
Posts: 10663
Loc: Central NH
I was assuming he wanted the MINUS 3Db point, as you would normally crossover to the sub where the main speaker is rolling off (if you didn't want to use the 80Hz standard, at least).
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