PA speaker impedance question, using a separate horn/sub

  • Thread starter Thread starter blackba
  • Start date Start date
blackba

blackba

Well-known member
In my new band they have these old peavey horn/sub setup. There are 2 separate boxes, one horn has the passive crossover components. When I use each of these systems should the horn/woofer combo give me 8ohms or would it be 4ohms. I am thinking 8ohms, but if I am wrong than one side of my amp would see 2ohms.

Here is the signal chain:

1 side of QSC RMX2450 amp --> Peavey horn1 --> LF out to peavey sub1
--> Peavey horn2 --> LF out to peavey sub2

The 2nd side of the amp is driving 2 8ohm monitors and seeing 4ohms.
 
bump...

I am pretty sure the amp will be seeing 4ohms, but just wanted some assurance.....
 
It's probably 8 ohms, but it's hard to tell some PA equipment is 4 ohms. We have 4 JBL 4735's and 4718's that we tri-amp, and they're all 4 ohms, but the 4722's that we use for side fills are 8 ohms.

The only way to know for sure is to measure them with a Multimeter or maybe look at the back of the speaker to see if it says what ohms rating it is.
 
The horn part says 8ohms, the bottom woofer/sub doesn't say. I measure about 6.6ohms with both the horn and woofer connected, so I think I am pretty safe to assume the combination is 8ohms....
 
Yeah, that's what I'd call it too. My 4 ohm Horn/10/15inch combo measures about 3.6 and it's a 4 ohm.
 
Marshall Freak":14ezlc1t said:
Yeah, that's what I'd call it too. My 4 ohm Horn/10/15inch combo measures about 3.6 and it's a 4 ohm.
Click to expand...

Thanks for the help. I like to avoid running my amps at 2ohms.....
 
I'd like to avoid that too, but right now I'm having to daisy chain those 4 that I have biamped at 2 ohms. I'm using a QSC PLX 3602 so it's made for two ohms and at 2 ohms it's putting 900 watts to each of those 15 inch mids, but I think I should get another amp and run one channel at each of them like I am the subs just to keep things cool and quiet. I can't afford it right now so that's just what we're going to have to use unless some of the other band members want to start ponying up for PA equipment. :gethim:
 
You must log in or register to reply here.
Back
Top