Originally Posted by ijansch
I have a marantz av8805 pre processor, which has 2 Xlr balanced subwoofer outputs.
I have two regular subwoofers connected to these.
Now I want to also connect a behringer nx3000d to power 4 jbl 12” subwoofers in a boss riser.
What is the best approach for this:
1) use one of the Xlr out for both subwoofers (they can be chained) and the second Xlr for the behringer, or
2) use both for the subwoofers but add one Xlr splitter to split one of them towards both the sub and the behringer?
I’m afraid option 2 has a disadvantage when using audyssey since it would influence not just the sub but also the behringer. But option 1 means Audyssey can’t optimize each sub individually. What’s the best approach here?
Also should I add all 4 jbl’s to a single output channel of the behringer or put 2 on each output channel? If I do the latter, do I also need to use 2 input channels?
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I'd definitely keep the shaker array on one XLR and bridge the subs on the second. This provides some flexibility in my opinion such as the option to put a couch mounted volume control for the boss, or (if you're receiver supports it) run different crossover points for each. The NX3000 supports bridged mode so all 4 subs can be on one channel bridged provided you dont go lower than a 4 ohm load in that configuration. Wire your subs 2 in series on in pairs of 2 then wire the pairs in parallel.
There are some advantages to having audyssey have to work with both subs at the same time as if they're one sub. It will see them as the pair of subs they're intended to be. There are arguments for it both ways. The benefit here is that perhaps audyssey will not "hear" anything when you have it equalize the boss set which is sub #2
and then it won't futz with it at all. This is ideal as I don't think you'd want audyssey doing anything on the BOSS array.
Video: JVC RS4500 135" screen in pure black room no light, htpc nvidia 1080ti.
Audio: Anthem mrx720 running 7.1.4, McIntosh MC-303, MC-152, B&W 802d3 LR, B&W HTM1D3 center, B&W 805d3 surround, B&W 702S2 rear, B&W 706s2 x 4 shelf mounted for atmos, 2 sub arrays both infinite baffle: 4x15 fi audio running on behringer ep4000 + 4x12 fi audio running on 2nd ep4000.