[Tim Farrant]

After reading this thread a bit more thoroughly, I have additional thoughts;

1] The board could be laid out to accomodate the 990/2520 opamps or standard dual in line IC opamps. It would be up to you to obtain the discrete opamps of your choice.

2] Having a mix buss link arrangement whereby 2 units could form a 32 channel summer would result in too much gain for a single opamp I feel (although the 990 might handle it). However, we could add 2 input XLRs that allow you to feed the output of the first into the second (think of it as a 18 input summing box). But how many people would use actually use 32??

Tim.