Can I use a Behringer B215A for a powered subwoofer?

[alaskaleftybass]

Greetings, I'm one of those poor souls here on Talkbass that owns a Behringer PA head and speakers.
I own a small powered head with 800 watts stereo into 4 x 112 cabinets, used as a mono system, with 2 x mains, 2 x monitors.

A couple days ago some friends of mine came by and dropped off a Behringer B215A powered cabinet. For those of you not familiar with the cab, it's a molded cabinet with a 15" woofer and a horn driver, 400 watts RMS.

I thought, what am I going to do with a 115 powered pa cabinet? Then the thought occurred to me: why not run a line out of the PA head and use it as a subwoofer. I like the idea, and the price is right on the new cab, but here's the problem. I don't know how I could filter the line out to the cab to make it perform as a powered subwoofer. I wonder if there's a box that I can buy that will cut the highs out of the signal so I can just use it as a powered subwoofer. The only controls it has on it is a volume control and XLR line out to send to another powered cab.

Thanks

 

[DuraMorte]

That is a full-range cabinet; it won't push lows like a real sub will.
If you have the option, sell it and scrape together a few more bucks for something like a K-sub or the like.

Edit: Or, keep it and use it as a monitor for the drummer. And buy a real sub.
Any way you look at it, a real sub is the only option for real bass.

 

[Munjibunga]

B-word says the frequency range is 55 hz to 20 Khz. There's no way to know if that's -3dB or -10dB (I'm betting on -10dB), but 55hz is your open A string. Everything below that is lower than the bottom of that cab's frequency range. If you start pushing lows through that cab at high volume, it's a goner.