Splitting Mono FX channel into frequency ranges

[Wolverinebass]

I'm not sure whether this should be in FX or Amps forum, but here goes.

Say you have an amp which has a mono FX send/return jack. You want to apply a particular effect (say chorus or distortion) to only the uppermost part of the signal - say above 800Hz - 1kHz and leave the rest unaffected preserving your bass end. Is it possible to do this either by using an EQ module or splitting the mono signal into 2 bits (the uppermost one being affected, the other lower portion being clean) then merging them back into each other to give a mono signal again which has been processed to your specification.

Is this is any way possible? If anyone has any ideas or suggestions they would be most welcome.

[Mr. Foxen]

Crossover and mixer will do it. Probably a simpler way though. Got a Lomenzo hyperdrive and figure how it does it.

[51m0n]

Absolutely possible.

You'd be looking for a device called an active crossover....

[velvetkevorkian]

The Boss GT-10b is another option.

[Silent Fly]

As has been said above, you need a cross-over to split the signal between low and high frequencies and a mixing circuit to recreate a mono signal containing the two components.

You may find difficult find a cross over that splits at 800Hz-1kHz. X-overs often split below 200Hz. I think Behringer produces a couple of unit that can go up to 9kHz. They are affordable but they are not small (1U) - you also need a mixer.

If you need a small unit that can do what you are looking send me an email (address on the [url="http://www.sfxsound.co.uk/mainpage.asp?page=about"]web site[/url]) - I should be able to help you.

[Wolverinebass]

Thanks for the info. I figured I might need a crossover, but where my problem lay is how to merge the 2 signals back into one and keeping it all in mono so it'll all go back into the return section of the FX loop. Whilst this is getting into bi-amping territory in some ways, I'll be doing this with full range speakers so it's not worth doing the change in amplifier system to get what I want.

I've had a look at some of the stuff suggested and I don't think the Boss is what I want. I have the sound I want and can acheive it in cubase by recording 2 channels, but I want to be able to do so live and sadly, I don't need any more effects!! Ha!!

The Behringer crossovers seem something like what I'm looking for but they're XLR ins and outs and I'd prefer 1/4 inch sockets just for ease of use.

Small would be good, so that I don't have to cart about 300 million feet of wires with me.

What ideally I want is the crossovers which you get in the bass pod. Where you can set the Modulation and Delay crossovers, but keep the signal in mono. Yes, I have one, but I'd be attempting to do the same thing with a different fx device which doesn't have this function.

If anyone has any more ideas, I'd be very grateful.

[Mr. Foxen]

A mini mixer will put the signal back together. I have one that is large pedal sized made by Monacor.

[Wolverinebass]

[quote name='Mr. Foxen' post='697222' date='Dec 31 2009, 02:51 PM']A mini mixer will put the signal back together. I have one that is large pedal sized made by Monacor.[/quote]


Ahh, I see. You've got the MMX-31? Seems like a plan as it doesn't need any power. Or are you using the MMX-4?

Still, have to find a decent crossover or see if there is any way to combine both devices like Silent Fly suggests. Thanks for the advice!!

[DanOwens]

Boss LS2 and GEB7. You set the pedal to A+B which is parallel. One loop you connect directly to itself, the other you put your GEB7 before your chorus and pull out all the low-end. There you have a splitter and mixer together and two parallel loops so effectively a blendable FX loop, and use the GEB as your cross-over.

Dan