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Author Topic: how to hook up my eaw subs???  (Read 8840 times)

Michael Webb

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how to hook up my eaw subs???
« on: February 26, 2011, 06:50:17 pm »

 :-[ trying to hook up eaw sb 750 zf using qsc rmx 2450 in bridge only the top speaker plays in both cabs pulled off back plate of cab and it uses all 4 wires i only have 2 in my speakon michael  270 445 1044 
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Thomas Lamb

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Re: how to hook up my eaw subs???
« Reply #1 on: February 26, 2011, 08:06:21 pm »

:-[ trying to hook up eaw sb 750 zf using qsc rmx 2450 in bridge only the top speaker plays in both cabs pulled off back plate of cab and it uses all 4 wires i only have 2 in my speakon michael  270 445 1044

NL4 Two Driver Subs:
Pin 1-   Driver 1 negative
Pin 1+   Driver 1 positive
Pin 2-   Driver 2 negative
Pin 2+   Driver 2 positive
Except DCS2, FR250z, LA128, LA128z, & SBX220
pin 2- = negative
pin 2+ = positive
pins 1-/+ = loop through

credit: EAW application support pages

Basically you are going to need to make a cable with +1 and +2 ,-1 and -2 tied together there are a couple other ways to do it as well but thats it. If you dont care about having the cabinet "STOCK" you could move the + and - 2 wires in line with + and - 1 wires.
T
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bigTlamb

"If you suck on a functional analog desk, you'll really suck on a complex digital desk...." Dick Rees

Michael Webb

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Re: how to hook up my eaw subs???
« Reply #2 on: February 26, 2011, 10:33:59 pm »

NL4 Two Driver Subs:
Pin 1-   Driver 1 negative
Pin 1+   Driver 1 positive
Pin 2-   Driver 2 negative
Pin 2+   Driver 2 positive
Except DCS2, FR250z, LA128, LA128z, & SBX220
pin 2- = negative
pin 2+ = positive
pins 1-/+ = loop through

credit: EAW application support pages

Basically you are going to need to make a cable with +1 and +2 ,-1 and -2 tied together there are a couple other ways to do it as well but thats it. If you dont care about having the cabinet "STOCK" you could move the + and - 2 wires in line with + and - 1 wires.
T
  but what do i do on amp end it is qsc 2450 in bridge mode
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michael l

don mcmeckan

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Re: how to hook up my eaw subs???
« Reply #3 on: February 26, 2011, 11:47:25 pm »

  but what do i do on amp end it is qsc 2450 in bridge mode
Michael, the two + lines on your cable go to positive on your banana plug.
The - lines go to minus on the banana plug.
Plug your banana plug into the two red binding posts on the amp ( ch 1 is positive ).     Enjoy Buckets of Bass!

Don
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Thomas Lamb

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Re: how to hook up my eaw subs???
« Reply #4 on: February 27, 2011, 10:24:23 am »

Michael, the two + lines on your cable go to positive on your banana plug.
The - lines go to minus on the banana plug.
Plug your banana plug into the two red binding posts on the amp ( ch 1 is positive ).     Enjoy Buckets of Bass!

Don
If you are in bridge mode the back of the amp will have directions showing you which speakon to plug into for bridge mode or which binding post to use typically both positives and they will will be labeled for proper phase.
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bigTlamb

"If you suck on a functional analog desk, you'll really suck on a complex digital desk...." Dick Rees

Sheldon Harris

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Re: how to hook up my eaw subs???
« Reply #5 on: February 27, 2011, 09:25:33 pm »

:-[ trying to hook up eaw sb 750 zf using qsc rmx 2450 in bridge only the top speaker plays in both cabs pulled off back plate of cab and it uses all 4 wires i only have 2 in my speakon michael  270 445 1044

michael, save yourself all the trouble and guessing and get yourself a speak-on to banana cable. it should have one nl4 on one end and two banana plugs on the other with 4 conductors inside.
for bridge mode, select the correct dip switch on the back of the qsc (very important) i have seen guys make mistakes with the switches and they know what they are doing. put both banana plugs in the two red binding post outputs with the positive end into the positive end and negative into negative.

if you want to use the subs driven by both sides of the amp. simple select stereo or parallel on the amplifier and plug each banana plug into ch1 and ch2
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duane massey

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Re: how to hook up my eaw subs???
« Reply #6 on: February 27, 2011, 11:12:16 pm »

I would strongly suggest not bridging the amp if you are using one amp for 2 cabinets. I assume the cabinets have 2 8-ohm drivers in each, so driving all four woofers with one channel would be a 2-ohm load, not a good idea for a bridged 2450.
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Duane Massey
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don mcmeckan

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Re: how to hook up my eaw subs???
« Reply #7 on: February 28, 2011, 12:08:08 am »

I would strongly suggest not bridging the amp if you are using one amp for 2 cabinets. I assume the cabinets have 2 8-ohm drivers in each, so driving all four woofers with one channel would be a 2-ohm load, not a good idea for a bridged 2450.

Good catch Duane, I assumed he had two amps.

Of course a patch bay would be the best way to go, jump the connectors on the panel ( 1+ to 2+, 1- to2- ).

Don
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Michael Webb

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Re: how to hook up my eaw subs???
« Reply #8 on: February 28, 2011, 12:38:28 am »

Good catch Duane, I assumed he had two amps.

Of course a patch bay would be the best way to go, jump the connectors on the panel ( 1+ to 2+, 1- to2- ).

Don
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michael l

Bennett Prescott

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Re: how to hook up my eaw subs???
« Reply #9 on: February 28, 2011, 02:06:19 pm »

I would strongly suggest not bridging the amp if you are using one amp for 2 cabinets. I assume the cabinets have 2 8-ohm drivers in each, so driving all four woofers with one channel would be a 2-ohm load, not a good idea for a bridged 2450.
Which means the amp sees a 1 ohm load, which it is not rated for, and will limit itself to avoid causing damage to itself (read: considerably less power output than you'd expect).
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