ADDING A POWERED SUB!!!

[crother316]

Hi, I am looking at adding a powered subwoofer to our P.A. we have a samson PA324, 300 watt, 6 channel, powered mixer.

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we have 4 out puts and a bridge output. we use 2 for stage monitos and 2 for stage speakers. we want more low end and want to add a powered subwoofer. but how do we send the signal to it without damage to it?

 

[modulusman]

More info would help, what sub are you planning to use? You can send a full range signal using the main out jack on the front of the mixer. This might sound OK or not. be sure to use the correct patch cable.

 

[Jimbob Jones]

If your sub has a crossover inside it, you can plug straight from the 'main mix out' into the sub. If the sub doesn't have a crossover in-built, you'll have to buy a seperate crossover unit, and wire it between the 'main out' and the input of the sub.

 

[Bardley]

Also, use the line outs from the mixer, NOT the speaker outs!

 

[crother316]

18" Powered Subwoofer Bass Cabinet - 1200 Watts RMS | 18 Inch Sub Cab | 18" sub woofer | 18 sub

this would be the speaker i would plan on using.

 

[crother316]

is a Low Pass Filter the same as a crossover?? specs say that is has a low pass filter 45Hz-800Hz

 

[T-Bird]

Hi.

is a Low Pass Filter the same as a crossover?? specs say that is has a low pass filter 45Hz-800Hz

In this case, yes the LPF does the work of a cross-over for the sub. It obviously doesn't have a HPF for the mains. That can mean overlap on the low frequencies, which in turn can create phase problems.

A decent cross over between two drivers handles both, not just one.

Regards
Sam

 

[crother316]

Hi.



In this case, yes the LPF does the work of a cross-over for the sub. It obviously doesn't have a HPF for the mains. That can mean overlap on the low frequencies, which in turn can create phase problems.

A decent cross over between two drivers handles both, not just one.

Regards
Sam

I guess i dont understand... why would i need a hpf for the mains? how would it overlap on low frequencies? pretty much, what do i need to add this sub to our powered mixer with out damage, and a solid signal?

 

[Hactar]

This is a bloody old thread, but in case your question hasn't been answered...
You would need a hpf for the mains because if both the sub and the mains have low-freq content, you might have rather nasty combing throughout the sound field or other such troubles due to the presence of 3 sources of low frequencies.

 

[crother316]

Hi, I am looking at adding a powered subwoofer to our P.A. we have a samson PA324, 300 watt, 6 channel, powered mixer.

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we have 4 out puts and a bridge output. we use 2 for stage monitos and 2 for stage speakers. we want more low end and want to add a powered subwoofer. but how do we send the signal to it without damage to it?

alright, i think i understand. but now what kind of crossover would i wan to buy? a 2 way or 3 way? stereo or mono??

 

[lowfreq33]

The ideal thing to do (regardless of what the gear companies tell you) is run the subs from an aux send. That way you can send only the instruments that need to be in the sub. Vocals and guitars have NO business going through a sub.

 

[crother316]

The ideal thing to do (regardless of what the gear companies tell you) is run the subs from an aux send. That way you can send only the instruments that need to be in the sub. Vocals and guitars have NO business going through a sub.

i understand this but the p.a. mixer i am using does not have an "aux send" knob on each channel to control signal through the "aux send". therefore i think all signal would be sent through the aux send.