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How to wire in parallel and series/parallel w/ speakon cables

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Randall Hyde:

--- Quote from: Scott Carpenter on February 04, 2011, 04:08:47 PM ---I am new to the world of speakon cables (Only done home audio up until this point)

Which Speakon cables will I need to wire:

1: 2 JBL JRX125's in series/parallel into a bridged 4ohm load on a Behringer EP4000 amp

--- End quote ---
I assume you mean in series. The JRX125 columns are 4 ohms each. In parallel they'd be 2 ohms which is probably too little for your Behringer amp.


--- Quote ---2: 2 JBL JRX115's in parallel into a single channel on a Behringer EP4000 amp (creating a 4ohm load)

--- End quote ---
No. Each column is 4 ohms. Put them in parallel and you've got 2 ohms. I'm pretty sure that's half what the Behringer amp likes. I could be wrong, but Behringer isn't known for making amps that work down at the level.


--- Quote ---3: 2 MACH M151i's in parallel into the other channel of the second Behringer EP4000 (creating a 4ohm load)

--- End quote ---
These *are* 8 ohm speakers. You can connect two of them in parallel to get 4 ohms. The Behringer *ought* to be able to handle 4 Ohms okay, but based on my past experience with Behringer equipment, I'd operate them at twice their lowest impedance rating -- they'll last a lot longer that way.

Bottom line, as others have suggested, you need two amps. I'd use the EP4000 on your subs and get something like an XTi 1000 or 2000 for your JRX125 cabinets.
Cheers,
Randy Hyde

Brad Weber:

--- Quote from: [email protected] on February 05, 2011, 11:17:39 AM ---No. Each column is 4 ohms. Put them in parallel and you've got 2 ohms. I'm pretty sure that's half what the Behringer amp likes. I could be wrong, but Behringer isn't known for making amps that work down at the level.
--- End quote ---
The JRX115 is a nominal 8 Ohm box and the EP4000 does have a 2 Ohms per channel rating, so two JRX115 in parallel, which would be a nominal 4 Ohm load, on an EP4000 channel should be fine.

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