This is my first attempt ever at a pre/power amp rig. The lighter power amp sure made the difference. I planned to use the XLS1500 w/ Markbass F1 as the pre to drive about 1000 watts, bridged @ 8 ohms, into my 8 ohm, UL410-II cab.
Of course after much research here on TB, I got all G.A.S.ed up for an actual preamp, darn y'all.

So I traded with a TBer for his Alembic F-1X then I won a BBE BMax that nite on the 'Bay. Til the preez arrived I was running the amp with the F1, worked just fine. I had a very nice n loud F1 now. Also, I called Zzounds and asked them to beat that GC $50 coupon, they did, offered another 10% off and let me pay it in 4 payments, nice.
Then the two preez arrived and I started hooking up other cabs to the 410. A 212, a 210 a 112. During this time I had many questions and fired off many PM's to TBer, Fuzz Bass and jnewark, thanks so much guys for your help and your patience. I settled on using the Neox 112 on top of the UL410 for my gig last nite. I ran em Y-input, Xover, HPF @ 50hz. I was kinda scared I'd blow something with all those watts, so I wanted to play it safe first time outta the gate.
I used the BBE pre since I felt its' tone went better than the F-1X where I use my 55-02D in the disco/funk/latin band with 9pcs, w/3 horns, keys, loud guitard, spec percs just a mess of folks up there and NO PA support for me. REALLY??? C'mon now.
Well I liked that I could turn the Neox 112T cab up just where I needed for my ears on CH #2. Had CH #1 cranked more thru the 410. Now, even with all the help TBers offered me, I'm real green about how all the options on the Crown work, so those final settings above were what I felt OK with as I only got to practice, alone in my livingroom before the gig.
Well I def had to crank the amp levels up more at the gig than I had at home, think I was only getting the 575 watts total or maybe about 300 watts per cab, have to go re-check the manual to confirm with that setup. But I also told Fuzz Bass if I had time, I'd switch to Mono-Bridge for about 1050 watts @ 8 ohms into UL410.
So third set break I shut it all down, I happen to own a Speakon to Banana speaker cord that I use with my Eden cabs, so just placed that into the Bridge banana hookups and speakon end to cab. I turned amp back on and pushed the settings buttons to get to Bridge Mode>HPF 50hz in a few seconds. Hey if a old-fart-dufus like me can do this on the fly, it aint hard to do.
AND AWW MAN! Does this setup sound awesome bridged into the that UL410. Thats originally why I bought the Crown was to run more watts into this single cab with F1. Well we can all see how that went and I'm already eyeing other preez to tryout, Jeez.
But I had fun, I was poppin n slappin way more than needed, HAHA just cuz it made the 55-02 sound so cool thru this bridged setup. Hey it was last set and I had to know what she could do, que no?
Well, I know now I can prolly almost always run the single cab bridged and have great, huge lows n plenty volume. But its cool to know I can do that sorta bi-amp thing with a smaller cab ontop if need be and still get very good n loud while controlling the top cab that's in my ear.
Gonna try the F-1X next week with my TX blues/rock band, def a single 410 this time and Am St P5. Smaller band, less loud, tho still no PA for me. OH, and at home I did try my VT pedal, LMII, F1, Neopak heads into the Crown amp. I feel, you still get the tone from those amps with just awhole bunch more balls behind em. I only used the HPF @ 50Hz as so many TBers seem to use that with pre/power amps they use, I just thought it'd be safer.
And I only play 5 string basses so don't know if I'm hurting or helping myself with this. The Crown limiters were on, tho one can turn them off as well, per Clip #1 & Clip #2 in panel menu. Everything you need on the front LCD readout, really cool.
Finally, if anyone else can suggest more (better) settings on how I might use the Crown, or if I'm doing something wrong here, pls let me know. From what little I know and have tried so far, these DriveCore XLS series amps are very nice, very light, powerful and so easy to use. Why I bet even a caveman could do it.

Peace y'all.