'active' means RCA level and uses DC power, remote and ground
I think you meant passive.
but try this first: set the settings like this and
run the tweeters on ch1&2
run the midbass on ch3&4 (this way you can use the remote volume knob to turn the mids down if needed) [or you can use front/rear fader on your deck]
as for the gains, set them at half to start or set them correctly if you have a dd-1 or O-scope
the red arrows I drew represent the knob setting. the goal is 3,000hz {3.0khz} crossover point and 100hz subsonic filter on the midbass
{the knob grooves might be 90 degrees off from the setting (90 degrees off means pointing at 9 O'clock and 3 O'clock instead of 12 O'clock and 6 O'clock)}
if you don't understand, have someone help you