LPF (low pass filter) - where should it sit in the chain?

[knuckle_head]

Well?

... curious minds.

[steveksux]

Why do you want a low pass filter? What freq is it set to? Don't understand what you're trying to accomplish...

I use a high pass filter. 20 hz to cut subsonics out.

Randy

[knuckle_head]

... to isolate the signal to the sub and minimize frequency overlap.

[JimmyM]

ok, slow down, you're losing us

is this for a pa? a bass rig? describe the rig and be more specific about what you're trying to accomplish. i'll then reply with, "gee, i don't know," but i'm sure someone on here could answer

[knuckle_head]

I had a sweet rig set up at NAMM - powered Bag Ends, top and bottom. The full range cab got full signal from one side of an Alembic FX-2, while the Infra sub used the second output into the processor and then into the cab.

The Infra processor has a cutoff frequency of 95 Hz which gave me overlap between 50 and 95 Hz. The thought is to put a LPF in line - someplace - to minimize the overlap.

I could use a crossover, but all I'd use it for would be for the low pass and I really don't want another piece of gear if I can avoid it. I can wire up a LPF specific to current, etc., if I know where in the chain it would/should best sit.

[JimmyM]

right. ok, well my answer stands

actually i was going to suggest a crossover. are you going to high pass the top cab, too? seems a crossover would be cleaner, no?

[rpsands]

Where the crossover goes depends on where you have effects. No effects, it goes first before the power amp (right after the pre).

If you're talking a passive crossover, at 95hz or so I'd recommend buying a power amp Passive xovers at that lower are quite a lot of trouble.

Good crossovers basically let you control both the high pass and the low pass, so you set them individually. e.g. the BBE DS24 for example