Need help with splitting XLR OUTPUT


Can anyone help me with this question about splitting the subwoofer XLR OUTPUT from my processor to 4 different amps? I am currently using a single XLR. Cable that has a 3 way split from it and concerned about the signal being split again. I only have a Meridian 861 processor that only has a single XLR subwoofer out and I have to send one signal to my pair of JL Gotham subs and two other XLR cables to two separate Velodyne subwoofer amps.
One of the Velodyne amps drives a custom made subwoofer in my rear seat riser and the other amp drive my Buttkickers in the seating. I just added another row of seating and have another row of Buttkickers to drive but am concerned about splitting the single
XLR output signal into 4 different wires. What is the best way to keep the signal pristine or does it even matter that I am splitting it four ways. Should I just add another XLR Y splitter to one of the existing output cables, get another cable that has the single on one side that plugs into the Meridian with 4 cables broken out from it, or use some type of box? The Velodyne amps have RCA passthroughs on them but everytime I have tried to use the RCA input/outputs on anything connected to the Meridian setup I get some type of ground noise so I have to stick to the balanced connections.
farmersre
A better way would be to avoid splitters altogether. Instead, get a Jensen subwoofer signal transformer http://www.jensen-transformers.com with a single XLR in, and any number and mix of XLR's and SE's out (they'll make up anything you need) They are excellent audiophile quality. Call and ask for Dave and explain what you want to do. It will eliminate the ground loop problems and probably save you some cable cost.
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These may be some other options. As to their quality, or having the best electrical properties for subwoofers, I do not know.

http://www.markertek.com/Audio-Equipment/Audio-Interface/Audio-Splitters/Whirlwind/SPLIT-6.xhtml

http://www.sweetwater.com/store/detail/120A/

http://www.bhphotovideo.com/c/product/745298-REG/Rolls_RA163_RA163_Distribution_Amplifier.html
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Well after spending a week and a half and 2 emails and 5 unreturned phone calls to Jensen I a moving on to the second answer to my call for help. Thanks for the response.
Sorry you're having communication problems. My 2nd link looks like a very nice unit. Take a look at the company's website.

http://www.aphex.com/aphex-products/120a-distribution-amp/
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I use Jensen transformers to go from balanced to unbalanced lines. I sent an email a couple of weeks ago to Jensen asking about transformers to go from unbalanced to balanced lines. There's been no response from Jensen.

db
The Aphex unit suggested by Tls49 does look like an excellent solution, if you don't mind its cost.

Regarding the original question about using cable splitters to split four ways, it depends on the output impedance of the sub output of the Meridian (at deep bass frequencies), and on the input impedances of the JL subs and the Velodyne amps. Unfortunately none of those impedances appear to be specified.

If you want to pursue that approach, contact Meridian and ask them what the output impedance at 20 Hz is for the 861's sub output. Or, alternatively, what is the minimum load impedance they would recommend that it be used to drive.

Also ask JL and Velodyne for the input impedances of the balanced inputs of those units.

To assure good results, the combined (paralleled) input impedances of the JL subs and the Velodyne amps should be at least ten times as great as the output impedance at 20 Hz of the Meridian's sub output. Or, alternatively, the combined (paralleled) input impedances of the JL subs and the Velodyne amps should be greater than the minimum load impedance Meridian may recommend for the 861's sub output.

The combined (paralleled) input impedances of the JL subs and the Velodyne amps equals the reciprocal of the sum of the reciprocals of their individual input impedances ("reciprocal" meaning the number divided into 1). For example, if the input impedances are 10K for the Velodyne amps and 15K for the JL subs, their combined input impedance is:

1/(1/10 + 1/10 + 1/15 + 1/15) = 3K, or 3,000 ohms

Regards,
-- Al
I use a pair of Velodyne HGS-15s with an SMS-1 bass manager. All the connections of the Cary 11a, SMS-1, and the two subs are XLR. Velodyne suggested I just split the XLR output of the SMS-1 to the two subs. It's an easy solution and the one I'm using, but I wonder if it's the best solution. OTOH, it seems to work well.

db
DB, again the impedances of the Velodyne components don't appear to be specified, but nevertheless I see no particular reason to suspect that the two-way split would be an issue. The SMS is solid state, meaning that there is relatively little likelihood that it would have an inordinately high output impedance at deep bass frequencies; possible effects on mid and high frequencies would not matter; the fact that the interconnections are balanced minimizes the likelihood of ground loop and noise-related issues; Velodyne recommended the solution; and it appears to work well.

Regards,
-- Al
Thanks for your help. I just ordered the Aphex unit. I was concerned about splitting the signal after the Velodyne amps since they are all SC1250 units and would send a corrected signal out to the JL Audio Gotham Subs of which they have their own computerized setups as well. My preamp, the Meridian 861 v8 also utilizes room correction, so I am trying to split out a pure subwoofer out signal to each before any processing of the signal is done by any of the components. Since I also use a pair of Meridian 8000 speakers where the woofer/subs in them utilize room correction as well, i figured going with your recommendations of the Aphex. My system is rounded out with the Meridian 7200 center channel and 4 of the Meridian 5300 speakers.
Thanks again for all of your help.
Thanks, Al. I think I'll leave well enough alone as you suggest.

Oppo told me that 0.1 is sent to the subs regardless of the settings for the speakers, so I use the stereo output for the LR front of 7.1, because Oppo gives stereo special analog processing. I need to set the LR mains to large, because XLR analog stereo does not include bass management, but any crossover is applied. The KEF 107/2 mains extend to 20 Hz nicely with the KUBE, so subs are not really needed for music. But they shook the room when we played Life of Pi.

db
In rereading it, I realize the 2nd paragraph of my previous post doesn't make much sense without further explanation about the particular setup that is not worth going into.

db