Film-Tech Forum ARCHIVE: Help with Crossovers?

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Posted by Tissa DeSilva (Member # 4389) on 05-17-2012, 07:58 PM:

I am using QSC RMX amps with JBL 4675 speakers, KIndly tell me what kind of crossovers I should use? I can not change the amps because I have them already.

Posted by Randy Stankey (Member # 64) on 05-17-2012, 10:04 PM:

Depending on the version of that speaker you might not need crossovers.

I have the "regular" version of that speaker. (4675C) There is a passive crossover built in to the cabinet. The high frequency horn connects to a pair of terminals on the side of the cabinet then the wires from the amplifier connect to the inputs. The device inside the cabinet does all the work for you.

A lot of the time, this passive crossover is all you need. Yes, you'll get better performance if you use a separate crossover and biamp the system but it is not entirely necessary.

The decision is up to your audio engineer.

Personally, I would do it if I could but my speakers are hooked up as passive crossover and they sound just fine.

Posted by Jeremy Weigel (Member # 4208) on 05-17-2012, 11:57 PM:

We use the JBL 3160 external mounted cross-over. They're discontinued, but you can probably find them on eBay.

Posted by Tissa DeSilva (Member # 4389) on 05-18-2012, 07:04 AM:

Hi Randy
Iam using JBL4675 stage speakers and no crossovers build in.

Posted by Dave Macaulay (Member # 813) on 05-18-2012, 07:37 AM:

This is not enough information. Do you want a bi-amp system or a passive crossover system?
For bi-amp there are a lot of crossovers available. I would use Odyssey personally, pretty inexpensive and reliable (so far).
Passive, I don't know. The matching JBL crossover would be best I think.

Posted by V.V.Tushit Vijay (Member # 5455) on 05-20-2012, 07:02 AM:

Hi Tissa ,
Nice to see you here back to film-tech. And i suggest you to go for XTA DSP OR Ashly DSP. Which makes the better vocal and digital delay correction for the Auditorium .

Regards,

Tushit