Friends' setup consists of:

Stanton mixer (unsure of model number.. kinda old)
JBL JRX powered sub
JBL Eon G2 powered monitors

The problem we are experiencing is the sub barely plays, as its getting signal from the output from one of the Eon's. Unfortunately, the only cable supplied (at the time of purchase) was an XLR-to-XLR. And to add on top of that, his mixer doesnt have an XLR output.

The Eon's are getting signal directly from the mixer, with the Master outputs. What can we do to make the sub play louder? Sounds like to me its a signal issue but I figure the output of the Eon's would be a passthrough signal.

I plan to swing my 707 over there and have the monitors off my booth output, and use the XLR output of the Master for the sub.

Your thoughts...

does the sub have thru's? they usually do, i would go full range into the sub, and often they have a crossover as well, go out the HI outputs into your cabs.

if not, then the best way to do it is to buy an active crossover, you can get a cheap behringer one for like $100, or a really nice one for like $600, but a cheap one will do the trick for now.

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http://www.jblpro.com/pub/manuals/JRX100-user-guide.pdf

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how does that G2 combo sound?

Consider getting a DJ mixer with XLR outputs, or add a second mixer that can convert RCAs from the existing mixer to XLR.

Or a really simple way is to get an RCA to XLR adapter such as from Hosa http://www.hosatech.com/hosa/products/adaptors.html
I think the RCA(F) to XLR(M) adapter is probably what you want, the GXM-133. They're $10 to $15 each.

You would normally run the mixer into the self-powered subwoofer first. The subwoofer XLR outputs would be fed to the Eon inputs. Set the subwoofer to HPF (high pass filter) so only the highs (above 100 Hz aprox) are fed from the subwoofer outputs to the JBL Eons.

If you feed full-range audio (with the lows) from the subwoofer to the JBL Eons you might have too much bass.

BTW the Mackie subwoofers work the same way, they are the first speaker in the chain and are set to feed the other speakers (called "tops") with the audio above about 100 Hz.

Last edited by tvmann on May-26-2005 at 17:37