I agree that running it in Bi-amp mode (ie. using the cross-over to send different frequencies to each side) is a waste of time. But going dual-mono would be the best way to set it up IME, especially if you don't want to harm your speakers. A WT800B or C is capable of driving a 4-ohm load in bridged mode, that's true. But the specs say it puts out 1100 watts, plus 3dB of headroom (2200 watts peak power). You can damage a single 15 and/or a 2X10 cab with that much power. Plus (again IME), the WT800B and C sound better in dual-mono. Think of dual-mono as two separate amps with a single input. It's true you won't get as much power running that way, but there is a limit to what your speakers can handle anyway, so the power output doesn't matter as much. You still will be putting about 300 watts into each cab, with that 3dB of headroom (600 watts peak). That should be more than enough. If it's not, you need more speakers and/or cabs, not watts.
I only use my WT800B in bridged mode (1100 watts at 4 ohms) with a 4X10 (or larger) speaker cab, and only if the cab is rated that high. And I use a compressor (dbx 160xt). Even then, the WT800B has the power (in bridged mode) to destroy just about every cab made with those power specs, which are subject to fudging by marketing departments. So my advice is to play it safe, and use it in dual-mono, whether you have the WT800A(a,b,c,d) or the WT800B or C.
As far as settings, I think turning OFF the enhance is the best thing to do, unless using the amp for recording or with headphones. The frequencies that the enhance control boost are at about 30 Hz. and 6kHz. (I think), but it cuts the most important part of the tone, the low mids and mid-bass. These are the parts of the sonic spectrum that cut through and give a bass punch in the mix. I use a Schroeder 410L for nearly everything now. I either use an Eden WT550 for "low volume" gigs or the WT800B for larger venues or when I have to be loud enough. The Schroeder has lots of mids and mid-bass, but very little real low bass. That's fine with me, as most of those low frequencies should be handled by the FOH and PA amps and speakers, not by a stage rig. But I can still use the Eden EQ to get a bass tone that sits in the mix. Remember that the Eden EQ is really powerful (maybe even too powerful). A little goes a long way. My settings for Oldies, Motown and classic rock (which is what I play on a passive P-bass) are as follows:
Compressor - BYPASS (I do this with the WT550 too, even without the dbx)
Enhance -OFF
Gain 1:00
Bass 12:00
Low ~125 Hz. @ 1:00
Mid ~400 Hz. @ 1:00
High ~2200 @ 11:00
Treble 12:00
Note that these settings are for bridged mono, but since it is still a single input, there shouldn't be much difference.
I don't use the balance control, but with two cabs you might want to hold a note (maybe E at 7th fret, A string), turn the balance control knob, and see where you get the tone you like.
With these settings, and running two 8-ohm cabs in dual-mono, the WT800 (A,B or C) shouldn't be breaking a sweat. Turning up the master volume should be able to make the speakers break up, so be careful.
If you can't get a satisfactory volume using those two cabs and a WT800, maybe something needs to be looked at by a qualified tech.
Good luck.
I only use my WT800B in bridged mode (1100 watts at 4 ohms) with a 4X10 (or larger) speaker cab, and only if the cab is rated that high. And I use a compressor (dbx 160xt). Even then, the WT800B has the power (in bridged mode) to destroy just about every cab made with those power specs, which are subject to fudging by marketing departments. So my advice is to play it safe, and use it in dual-mono, whether you have the WT800A(a,b,c,d) or the WT800B or C.
As far as settings, I think turning OFF the enhance is the best thing to do, unless using the amp for recording or with headphones. The frequencies that the enhance control boost are at about 30 Hz. and 6kHz. (I think), but it cuts the most important part of the tone, the low mids and mid-bass. These are the parts of the sonic spectrum that cut through and give a bass punch in the mix. I use a Schroeder 410L for nearly everything now. I either use an Eden WT550 for "low volume" gigs or the WT800B for larger venues or when I have to be loud enough. The Schroeder has lots of mids and mid-bass, but very little real low bass. That's fine with me, as most of those low frequencies should be handled by the FOH and PA amps and speakers, not by a stage rig. But I can still use the Eden EQ to get a bass tone that sits in the mix. Remember that the Eden EQ is really powerful (maybe even too powerful). A little goes a long way. My settings for Oldies, Motown and classic rock (which is what I play on a passive P-bass) are as follows:
Compressor - BYPASS (I do this with the WT550 too, even without the dbx)
Enhance -OFF
Gain 1:00
Bass 12:00
Low ~125 Hz. @ 1:00
Mid ~400 Hz. @ 1:00
High ~2200 @ 11:00
Treble 12:00
Note that these settings are for bridged mono, but since it is still a single input, there shouldn't be much difference.
I don't use the balance control, but with two cabs you might want to hold a note (maybe E at 7th fret, A string), turn the balance control knob, and see where you get the tone you like.
With these settings, and running two 8-ohm cabs in dual-mono, the WT800 (A,B or C) shouldn't be breaking a sweat. Turning up the master volume should be able to make the speakers break up, so be careful.
If you can't get a satisfactory volume using those two cabs and a WT800, maybe something needs to be looked at by a qualified tech.
Good luck.