PA set up question

[mr_flood]

I've been using a small PA system for band practice, it's a 4 channel powered mixer with 2, 100w 4 Ohm outputs. I've recently been given two Yamaha S215IV speakers and the associated sub-woofer.

My questions is this: can I plug the 200w outputs of the powered mixer into an amplifier and then the amplifier into the speakers?

 

[WayneP]

Absolutely not. That’s a good way to blow out the amp.

Regards,
Wayne A. Pflughaupt


Administrator, Pedulla Club #45
Administrator, Tobias Club #133
Fretless Club #943
Big Cabs Club #23
My Basses
Pedulla Club #45

 

[s0c9]

I've been using a small PA system for band practice, it's a 4 channel powered mixer with 2, 100w 4 Ohm outputs. I've recently been given two Yamaha S215IV speakers and the associated sub-woofer.

My questions is this: can I plug the 200w outputs of the powered mixer into an amplifier and then the amplifier into the speakers?

What Wayne said... ABSOLUTELY NOT.
Powered mixer outputs are designed to drive passive (non-powered) speakers, not go to the input side of an amplifier.
There maybe some outputs on the mixer that are NOT powered.. which COULD go to the amp then speakers..
Which model is the powered mixer?

 

[mr_flood]

What Wayne said... ABSOLUTELY NOT.
Powered mixer outputs are designed to drive passive (non-powered) speakers, not go to the input side of an amplifier.
There maybe some outputs on the mixer that are NOT powered.. which COULD go to the amp then speakers..
Which model is the powered mixer?

B52 Matrix 200.

And thanks for your replies.

 

[s0c9]

B52 Matrix 200.

And thanks for your replies.

Very limited options with that mixer...
It's barely going to move those Yammy boxes, but with what you have: -
hook up the Left/Right outputs of the mixer to each S215.
Use the sub out to go to an amp (which you don't have) and from there to the sub (I'm assuming you have only one)

Unless you are playing folk music, 100w into the S215's is nowhere near enough power for anything resembling rock.
The speakers are rated
Power Handling (noise, program, peak) 500/1000/2000
Meaning they're rated to handle 1000w all night long and you are putting 1/10th of that into them.
I would recommend talking to someone local who provides PA's rentals and pick their brains on what you would need to run those speaker efficiently to get maximum value from them..
PS: Those are great speakers BTW.

 

[mr_flood]

Very limited options with that mixer...
It's barely going to move those Yammy boxes, but with what you have: -
hook up the Left/Right outputs of the mixer to each S215.
Use the sub out to go to an amp (which you don't have) and from there to the sub (I'm assuming you have only one)

Unless you are playing folk music, 100w into the S215's is nowhere near enough power for anything resembling rock.
The speakers are rated
Power Handling (noise, program, peak) 500/1000/2000
Meaning they're rated to handle 1000w all night long and you are putting 1/10th of that into them.
I would recommend talking to someone local who provides PA's rentals and pick their brains on what you would need to run those speaker efficiently to get maximum value from them..
PS: Those are great speakers BTW.

So does the un-powered sub-woofer out carry the entire signal range that can then be fed into an entirely separate power amplifier?

 

[s0c9]

So does the un-powered sub-woofer out carry the entire signal range that can then be fed into an entirely separate power amplifier?

Based on MY experience with this type of setup.. the answer is NO!
They have an internal crossover (low-pass/high-cut filter) that will send the signal BELOW a certain frequency to that output. It's usually a fixed value, not adjustable and often not documented as to what that value is.

I didn't see it noted in the mixer doc anywhere, but from other vendors it's often set around 100 Hz. Anything below that goes, above does not get sent.