active X-over

Yes but you haven't said why you are not simply using the bass management in your prepro. Also, can we assume you are using the EQ in the Velodyne?

Kal

Yes I am(as little as possible,using the EQ,I'm hoping the 10B X-over is superior to my prepro also.
To me the signal has to go thru the prepros bass management(
or not)or the subs bass maagement.I could be wrong,but if the signal goes thru the 10B,I'm hoping for more quality.To me it's like replacing a average component and upgrading to something of way higher quality and hopefully quality bass while freeing up my mains of lowend. Another way, say if I was using lampcord for speaker wires instead of Cardas GRCS
Quality piece, hopefully gives you quality sound
which depending on all my other sources.I'll know soon enough.

I think the only way to tell would be to take some measurements. I don't think I tell purely by ear.

Typically the biggest problem in full range free standing speakers is the broad suckout somewhere between 100 and 300 HZ - it can be a real devil of a problem and it is near universal too. In some cases a 12 db crossover on the sub may work better than a 24 db filter typically from a pre. You need to try it and see...but I'd recommend measurements and trying all kinds of positions for your sub too - ultimately positioning may be the most important factor overall...

To me the signal has to go thru the prepros bass management(
or not)or the subs bass maagement.I could be wrong,but if the signal goes thru the 10B,I'm hoping for more quality.To me it's like replacing a average component and upgrading to something of way higher quality and hopefully quality bass while freeing up my mains of lowend.

If you are passing the signals through the pre/pros DSP, it will make little difference to the signal "quality" (whatever that means) if you choose or avoid a simple function like bass management. I do not know what prepro you are using but I can think of many better ways to use the money you are spending on the 10B. (Not that I dislike that device but I would see it as more appropriate in an entirely analog system.)

Kal

I have found the best position for the sub using the mike and the display from the DD-15.I put the sub where I sit and with the DD graph on my tv screen I walked around the room to see where I could get the flattest response and that's where the sub went.
I am using a Arcam av-8 prepro and I'm going stereo direct(bypassing all digital)my cdp is a bryston BCD-1,
I'm using the analog outs of the cdp and into the analog in the Av-8,utilizing the dacs in the BCD-1,which I find superb.quality signal to me is,free off as much distortion,noise or what ever else gets in the way.the sound of am radio compared to FM or even sattalite radio.
I got a great deal on the 10b and I'll have her in a few days,as I say we'll see.