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Author Topic: processor splitting example VRX932LA jbl  (Read 873 times)

Andrew Klingensmith

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processor splitting example VRX932LA jbl
« on: September 10, 2014, 03:57:38 pm »

Question

In a typical small time set up, we may have a processor (say the drive rack PA2) which has 6 outs. Passive, NOT bi amp tops

A few questions

* Do you guys running these power hungry VRX 12" think a qsc plx3602 is enough power to run a pair? That is, one amp channel per box? And, following that,  3 amps to run 6 boxes (that is, every box has it's own amp channel) ? Or do you think a pair would need more amp? RMX4050 maybe?

I hear of folks bridging amps on VRX. So say you want run 6 VRX total (3 per side), is it better to bridge an amp and put 2 on the one amp bridged, instead of 2 with one per channel on the same amp? The thing is, doing that mean you can bridge amp one for a pair left, bridge amp 2 for a pair right, but the 3rd amp....for the 3rd pair...has just one speaker perside so now can't keep stereo

Another question is how far does the "Y" cable go before your in trouble?

If we were to say want to run 6 cabs total (3 per side), and the processor was a driverack PA2, it has 6 outs, so if your using 2 of those for subs, only 4 are left. So even if you could make the processor send out 2 lefts full range (mid high), and 2 rights full range, your still short. Is using a passive rack mount splitter an option, or is there just too much signal loss? So if guys run 4 vrx a side, would they just need to buy another processor at that point, if splitting passive is that horrible?

thanks
 



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TJ (Tom) Cornish

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Re: processor splitting example VRX932LA jbl
« Reply #1 on: September 10, 2014, 04:24:27 pm »

Question

In a typical small time set up, we may have a processor (say the drive rack PA2) which has 6 outs. Passive, NOT bi amp tops

A few questions

* Do you guys running these power hungry VRX 12" think a qsc plx3602 is enough power to run a pair? That is, one amp channel per box? And, following that,  3 amps to run 6 boxes (that is, every box has it's own amp channel) ? Or do you think a pair would need more amp? RMX4050 maybe?

I hear of folks bridging amps on VRX. So say you want run 6 VRX total (3 per side), is it better to bridge an amp and put 2 on the one amp bridged, instead of 2 with one per channel on the same amp? The thing is, doing that mean you can bridge amp one for a pair left, bridge amp 2 for a pair right, but the 3rd amp....for the 3rd pair...has just one speaker perside so now can't keep stereo

Another question is how far does the "Y" cable go before your in trouble?

If we were to say want to run 6 cabs total (3 per side), and the processor was a driverack PA2, it has 6 outs, so if your using 2 of those for subs, only 4 are left. So even if you could make the processor send out 2 lefts full range (mid high), and 2 rights full range, your still short. Is using a passive rack mount splitter an option, or is there just too much signal loss? So if guys run 4 vrx a side, would they just need to buy another processor at that point, if splitting passive is that horrible?

thanks
I'm a little confused at your questions.  Some thoughts:

Line-level Y cables such as those used to go from the outputs of a processor to the inputs of multiple amplifiers will work fine, and will work for longer distances than you'll need.

Powering passive VRX is frequently done by chaining boxes together and powering a whole side off one amp.  A PLX3602 will definitely make sound, but may be a little small compared to getting the full output, BUT, keep in mind that doubling the amplifier power into the same number of speakers only increases the sound pressure a maximum of 3dB, and frequently less than that.
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Re: processor splitting example VRX932LA jbl
« Reply #1 on: September 10, 2014, 04:24:27 pm »


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