i though the whole idea of bi-amping was to send lows one way and highs another. my 410's sometime sound like farts when i get on my low c'
That is what biamping is, but to do it effectively, you'd want one large sub, and one very small mid speaker and maybe a tweeter. Iow, an actual PA subwoofer for the lows, and a 1x8 mid driver. With 2 full range cabs, it just doesn't work out the same. If you're looking for those super low frequencies, it'll also take massive power to reproduce. Most "normal" bass rigs don't go that low, even biamped.
I disagree, if you send all the meaty lows to the fifteen and keep the 410 pushing all your mids and highs you should be able to cut out all the farting as well as get a little bit better articulation in your complex tones. Ive noticed the bi amping makes my passive basses sound more even across the fretboard as well as my low b ring clearer and stronger.
With that being said, I don't want to have to rely on this feature that is not available from every amp. So my current rig is a 410 and a 215.and both cabs have their own character and complement each other with my yorkville pushing out the same mono signal to both.
If yout want a biampable head, check out the svt 4pro. Also, if money is an issue, find a used Hartke 7000.