While waiting for my BrianGT order

[mrlots2do]

I started making schematics for 3way active crossovers with dedicated volume controls for each channel. This is my first active crossover design.

What devices do I use in these active crossovers? An op-amp. Please make suggestions.

I know I daisy chain all the active crossover connections going to ground but what do I ground them to?

I know you won't be able to see upclose the schematic I provided so I'll explain. Sorry the pic was too large for attaching to message.
http://phillyguy19020.bravehost.com/Active%203way.jpg
1) Receiver preamp out to BSC, to woofer LPF and down to midwoofer HPF.
2) Woofer LPF to volume control, to BrianGT's GC, to 2 woofers (4 ohm load).
3) From 1) midwoofer HPF to midwoofer LPF and down to tweeter HPF.
4) Midwoofer LPF to volume control, to BrianGT's GC, to midwoofer (8 ohm load).
5) From 3) tweeter HPF to volume control, to BrianGT's GC, to tweeter (8 ohm load).

I've looked and looked for simplified filters but am having trouble finding Notch, Linkwitz Transform and EQ.

Thanks for the help.

[mrlots2do]

The schematic was drawn on ExpressPCB then screen shot to the pic. Sorry about the poor pic quality. I could email the ExpressPCB file to anyone interested in looking at it.

[Devil_H@ck]

Originally posted by mrlots2do
...I know I daisy chain all the active crossover connections going to ground but what do I ground them to?...

Well, you need a negative & positive power supply for the opamps, so you'll have a ground too.

There's a webpage that stores old webpages, but I forgot it's name. Linkwitz's filter page is on there. I'm sure someone else knows.