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FDP Forum / Performer's Corner / Can I purchase a Sub only Crossover?

Cal-Woody

USA/California

Why do I keep fixing things that work?
Apr 21st, 2016 09:36 AM   Edit   Profile   Print Topic   Search Topic

Currently, I'm using my DBX crossover to extract the sub frequencies for the PA, as the other speakers are full range, as are the monitors, but was wondering if someone manufactured a stand-alone sub X-over?
The reason for this is: The DBX 4-way X-over is a good piece of equipment but the other sections/channels, I think are for more separate components= i.e: highs/mids/lows/subs and don't want to limit the range or frequencies sent to these cabs.
We have all Yamaha speakers [4@ SM115's monitors/2@ CM2115's Mains/ 2@ CM118 subs] so other than the EQ section of the mixer, I use 2@ 882i Sonic Maximizers for the mains and one for the floor monitors. (These add some really nice detail and fullness that the mixer EQ just misses and the fidelity really shines without feedback!)
If I'm thinking this incorrectly, I sure could use some help! Because the speakers are Full-Range and am not sure if the DBX X-Over limits the potential of each cabinet.
I also have a DBX Drive-Rack 2 with reference mic and can program my speaker type into it, but right now I'm getting a great presence and detail from the speaker system and just want to use a Stand-Alone Sub X-Over. (Of course, I have good amps for each component of the system. 1@ QSC PLD 4.5 , 2@ QSC 2450 and 1@ Crown XTI3500 for subs.)
My ' Many Thanks' in advance, Woody

Peegoo
Contributing Member
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Eat. Sleep. Guitar.

Repeat
Apr 22nd, 2016 10:15 AM   Edit   Profile   Print Topic   Search Topic

The only 'sub-only' crossovers I've seen are for automotive applications. That doesn't mean they don't exist for PA applications tho.

That DBX unit and Drive Rack are outstanding pieces of gear...it's state of the art stuff. I would be very surprised if there was any substantial power loss resulting from the four-way freq split.


Hammond101
Contributing Member
*********

So. Cal. USA

Apr 22nd, 2016 10:43 AM   Edit   Profile   Print Topic   Search Topic

I'm using a dbx 223xs for exactly what you want to do. It's stereo 2 way mono 3 way so in my Stereo PA system used as a sub x-over it works perfectly.

You end up with an input level, x-over frequency control, low output level and high output level for each channel.

Note: you can run only the sub system from the crossover x-over and run your mains direct if you want them full range. Just Y the signal from your board and insert the crossover prior to your sub power amp. Run your mains amp direct from the board or the drive rack. Done!

You should be able to do this with your dbx 234 series x-over and not have to purchase a new piece of gear.

Cal-Woody

USA/California

Why do I keep fixing things that work?
Apr 23rd, 2016 07:15 PM   Edit   Profile   Print Topic   Search Topic

@Peegoo: yes, the only sub x-over I have found were for car audio. Isn't it interesting that for as long as sound systems have been around, you'd think that this could be found as a stand-alone unit! On the QSC PLD amp, I can program the channels and tailor them to almost any speaker type, but I like the fact that the x-over can be adjusted for when and which frequencies begin to go to the subs.
But I do have a dedicated amp for the subs and instead of using any odd cabling to obtain a signal, the QSC amp has parallel inputs/outputs and hence, just take the main inputs which are parallel to a set of outputs and send that directly to the x-over and extract the low frequencies from there. This frees up 2 channels to run monitors. The QSC 4.5 is an 4 channel amp @ 2000 watts.
But it is nice to have some confirmation, from Hammond and yourself, that my thinking was more correct than in error!
I do have some really nice old Rane x-overs that work excellent, if I were running a true component audio system. These have built in alignment delays and also have the RTA with decibel meters. Still use one for the F.O.H sound check and can adjust the mix/volume to our specs then once that is achieved the sound man can add whichever frequencies he needs to boost or cut. Or if we don't have a soundman I can set it for automatic adjustments and it will use the internal 30 band EQ to do the job. Just have to find an inconspicuous place to position the reference mic. DOD used to make a nice RTA unit.
Ok, I'm rattling on here and just really wanted say 'Thanks' for your help and support! Lol
Bye for now, Woody

FDP Forum / Performer's Corner / Can I purchase a Sub only Crossover?




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