Best means to split highs and lows/bass signal?

Goal: split the highs and lows of my bass signal.

Questions:
What is the best means to do it?
Is the 'stereo' design in my SWR 8x10 cabinet which 'allows for a split signal into 2 different sections of the cab' intended for a split signal?.

I have heard this done in the studio for recording purposes and heard Alex Webster do it live with an Ampeg 8x10, but have not been able to figure it out myself. Thanks very much for any help and clarification!

Gear:
Ampeg SVT Classic
SWR Megolith
 
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Goal: split the highs and lows of my bass signal.

Questions:
What is the best means to do it?
Is the 'stereo' design in my SWR 8x10 cabinet which 'allows for a split signal into 2 different sections of the cab' intended for a split signal?.

I have heard this done in the studio for recording purposes and heard Alex Webster do it live with an Ampeg 8x10, but have not been able to figure it out myself. Thanks very much for any help and clarification!

Gear:
Ampeg SVT Classic
SWR Megolith

Hello. In summary: You are describing a biamped setup, for which you will need a crossover and a second amplifier.

Your Megoliath cabinet is two full-range enclosures joined together, of which the top one has a crossover between its 10" drivers and its tweeter. In other words, the Megoliath is not designed to split a bass guitar signal into high and low frequencies to be sent to its respective enclosures. The user manual states this very clearly.

Since both of your SVT Classic's amplified outputs are full-range, if you will use it in this setup then you will need a standalone crossover to split your bass guitar into low and high frequencies, then you will need a second amplifier.

Your SVT Classic would amplify one of the crossover's outputs, driving one of side of the Megoliath; and your new second amplifier would amplify the other of the crossover's outputs, driving the other side of the Megoliath.

Probably it would go something like this:

bass guitar > SVT Classic preamp in > SVT Classic preamp out > crossover in >

crossover high out > SVT Classic power amp in > Megoliath top in

crossover low out > new power amp in > Megoliath bottom in​

There are a number of rackmount crossovers in production nowadays, plus many older models that can be bought used.

Pedal format crossovers are uncommon. You won't go wrong with sfx, who makes the X&M crossover and mixer pedal.

Lastly there are bass preamps designed around an internal crossover. A notable recent example is the Geddy Lee signature model by Tech 21, the GED-2112, a rackmount unit.

Good luck!
 
Snaxter wrote:
Probably it would go something like this:

bass guitar > SVT Classic preamp in > SVT Classic preamp out > crossover in >

crossover high out > SVT Classic power amp in > Megoliath top in

crossover low out > new power amp in > Megoliath bottom in

Thanks Snaxter, this really gives me a picture of how this would appear. Affecting a split signal is entirely new to me, though I believe I have heard some bassists live do this to great affect. I recently realized how effective it was while observing it in a recording process and had never considered it as part of a standard set up until now.

X&M crossover and mixer pedal
Very cool, thanks for the link and an interesting piece about preamps built around an internal crossover like Geddy Lee's sans amp.

Crguti wrote:
Alex uses Aguilar amp and cab.
Yeah, this was back in '98; he was playing through an SVT Classic and an Ampeg 8x10 live. What was striking was the distinct quality of the highs and lows. At first I thought it was just the warmth of the tubes but as time has passed I have begun to wonder if it was something more like splitting the signal. Perhaps, I am wrong, but it was remarkably similar to what I hear when the signals are split and then re-blended by a recording engineer.

Schlyder wrote:
Just run your bass into an ABY pedal, then out to your 2 different amps, and then EQ the 2 full range signals how you want.
Thanks Schlyder! These kinds of suggestions are really helpful, as I wasn't even aware of these pedals. The Morley ABY-2 looks like a solid fit as it appears to do just the thing I would like to achieve while holding the range. If I am wanting to overdrive/dirty the high end a bit with a an overdrive pedal would that be placed on the high end out of the ABY as it leads to the amplifier which will receive the high end?

Alien8 wrote:
Iron Ether Divaricator is part of the answer to your question.
Whoa! Just watched a demo on Youtube, that is one heck of a pedal. I give my sound some grit with a Boss ODB3 and a little more brightness with a Boss Flanger; this pedal achieves both of their sounds and more without sacrificing dynamics or low end. The Iron Ether website states "the pedal splits a signal into high and low frequency bands, and processes the high frequency band with any combination of three “exciters” - each enhancing a different aspect of the sound – before sending this enhanced harmonic content through an external effects loop. To tame the potential for enhancing high frequency noise along with the signal, a noise gate is applied to the excited signal path. The low frequencies are passed through directly, to preserve the bass frequencies without introducing muddiness, booming, or cancellation". To your knowledge, is everything they are describing taking place 'on board', that is within the pedal, the external effects loop and the noise gate as they are applied to the 'excited signal path'? After listening to the demo, I am almost convinced this pedal might be as effective as bi amping with low and high frequencies...

jimfist wrote:
What is the problem..?
Thanks for the link and the question. I am hoping to better hold the depth of low end and the dynamic range of the highs when using overdrive to give a touch of grit to the sound. What I have noticed from a split signal in the studio and perhaps from some live bass sound is that the low end and the dynamics of the highs really standout from one another when separated and thus the overall sound is more compelling and cuts above and below the mix.
 
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Rolls SX21 Tiny Crossover . Use one on my pedal board with a Boss LS 2.

SX21_Large.jpg
 
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Iron Ether Divaricator is part of the answer to your question. Bi Amping with a bass amp and guitar amp or bright bass amp would do it.

I totally love my Divaricator. Although I understand people sort of not 'getting' it. It's the worlds best unsexy trick pedal.

DSC_0125.jpg
 
Just run your bass into an ABY pedal, then out to your 2 different amps, and then EQ the 2 full range signals how you want. Much simpler, and I wager that it will sound better as well.
I second this. I go into an ABY with my bass signal through a DG A/Om and B7KU for that chainsaw bass grit, and my "guitar" signal through an octave up and Boss ODB-3. Bass to bass amp, octaved signal to guitar amp.
 
Two more crossover pedal blenders are the Brimstone Ouroboros and KMA Tyler, but I wouldn't bother since you only need a splitter not a blender. The Rolls looks like a good option, just make sure you go into some kind of buffer beforehand as it probably doesn't have high impedance inputs for connecting a passive bass straight in.
 
Interesting, it's a coincidence that I saw today a new device called Filter FX Loop , made by Broughton. It allows to apply HPF + LPF to the FX loop and LPF to the clean signal and then mix them again. I instantly thought about using it as kind of croossover: employing effect (overdrive, reverb) in the FX loop with high HPF setting (for instance 300Hz) and blending it with the clean signal with "low" LPF setting (again 300Hz)...
 
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This looks great. Can it be used as crossover only (without the mixer function)?

Is it still in production? I don't see on the sfx web pages (even though I can access through the link you provided)

Yes it can. You’d have to email Max at SFX and ask. He does custom work so shouldn’t be a problem building something that isn’t a standard offering, e.g. if you just want a crossover splitter without the mixer.
 
Do you want this tone for your audience, or for yourself on stage?

It would be WAY easier to run two channels to the board to pull this off. No need for two amps and complicated equipment.

I run two channels quite a bit. I'll run a fairly bright tone from my bass (passive with the tone knob dimed). Then I run something more "beefy" from my amp. I run in-ears sometimes and blend them in my ears. I have also run my bright sound to my monitor wedge speaker and had my amp behind me.

Splitting powered signals is going to cause you to bring a metric buttload of stuff with you to the gig. Splitting at the pre level is easy as pie.

Never mind that sending two different signals to the same exact speakers (top and bottom of your SWR cab) will likely not yield an incredible results.

Whatever you heard (if it was even a split signal to begin with) at the concert didn't happen at the SVT. I might have happened at the board. But no way did he split the powered signal from the SVT into top and bottom sections of his fridge. It's not impossible. But it's incredibly unlikely. What you likely heard was his signal from the board through the PA and his on-stage rig at the same time. HE likely never heard the split signal unless he was wearing in-ears.