MPC2500;
Midi A Out -> Casio FZ-1
Midi B Out -> Midi to Sync 24 box -> Roland MC-4 -> Roland SH09
-> Roland TR808
-> Roland TR 606
Midi C Out -> Computer running Nuendo 3 -> Midi Thru -> Kenton Pro 9 -> Korg MS 20
Midi D Out -> Yamaha DX9
Midi 1 In <- Casio FZ-1
All audio outputs go into my Allen and Heath GS3 -> group outs 1 to 8 go into my RME Fireface 800.
I got outboard compressors DBX 118 and 119, two Urei/JBL 7110's on the inserts for groups 1,2,3,4,5,6.
My separate MPC outputs also go into the mixer (I have to make some space if I don't have any of the 24 tracks free) so I can process individual tracks through the compressors, Lexicon PCM 70, spring reverb (accutronics tank ripped from a hammond), Boss DD5 delay, Ibanez FL9 flanger, DBX 120A subharmonic synth, tube preamp. My aux sends are output to the sidechain of one of my compressors, the PCM 70, the spring reverb and a feed into the external input of my Roland RS09 which feeds the chorus ensemble. I also have the an output from the desk channel cue going into the external input of the SH09 so I can put stuff through the fat filter!
erm... there's more setups.... but I'm just rambling now.......
For the past few weeks I've been using my mpc kinda standalone and processing individual hits through my outboard and resampling, resampling, resampling back into it and doing loadsa layering.. very enjoyable