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  #1  
Old 10-19-2010, 12:58 AM
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Aguilar DB 750 Head; 2XAguilar GS 1x12, EBS Proline 410....Impedance question

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Hello,
I would like to ask you if it is possible to make a rig from:

AGUILAR DB 750 - 2 ohm minimum load
EBS Proline 410 - 800 W - 4 ohm
AGUILAR GS 1X12 - 300 W - 8 ohm
AGUILAR GS 1X12 - 300 W - 8 ohm

My question regards the Impedance matter...Can I use my amp with these 3 cabs?

I found a formula in one article:
''Calculating Total Impedence of Different Impedance Cabinets

If you are hooking up two cabinets of different impedances, there’s a little more math.

(impedance of cab 1 X impedance of cab 2) / (impedance of cab 1 + impedance of cab 2)

For instance, if you have a 4-ohm cab and an 8-ohm cab:
multiply 4 x 8 = 32
then 4 + 8 = 12
32 / 12 = 2.667 ohms
If your amp is rated only for 4-ohms, you can’t use this configuration of cabinets with 2.667 ohms.

An alternate method is to theoretically treat the single 4-ohm cab as two 8-ohm cabs. When they’re all the same impedance use the prior calculation method: divide the ohms of one cab by the number of cabs. Our same example would be 8 ohms/3 cabs = 2.667 total ohms.''

If this formula works can I apply it for 3 cabs with different impedance?

Thank you
  #2  
Old 10-19-2010, 05:21 AM
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Well...

Unless I'm missing something, if you connect the two Aggie cabs together and then connect the paired cabs and the other can to the 750, it will bs seeing a 2ohm load. Two 8 ohm cabs in parallel will be 4 ohms and that with the other 4 ohm load in parallel will be 2 ohms.
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  #3  
Old 10-19-2010, 05:25 AM
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2ohms, with each 112 getting 1/4 of the power, and the 410 getting 1/2 the power of the head. Should work nicely.

With parallel connection (which is standard), a 4ohm cab is identical to two 8ohm cabs... so your situation is identical to four 8ohm cabs. Since your smaller, single speaker cabs will be getting less power than your big four driver cab, you will end up with each 12" driver getting a bit more power than each 10" driver, which, all other things being equal' is a good situation for getting the most out of all those cabs.

Last edited by KJung : 10-19-2010 at 05:27 AM.
  #4  
Old 10-19-2010, 06:29 AM
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Agreed, should work just fine and I'd imagine that EBS Proline probably sounds pretty good with that Aggie 750 - tightening up the wide voicing and big low end a bit
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