zapco DSP-Z8 IV II Owner's Manual page 21

5 6 7
The Ch. Outputs ( 5 ) are listed on the left side. Channels 5 and 6 are listed as rear speakers
and 7 and 8 are listed as subs but using the drop-down function menus you can make each
channel be whatever is needed for your system. The choices are TW (tweeter), TW/MID
(tweeter or Midrange) Woofer (woofer/MidBass), Center, Sub, Sub Left, Sub Right.
Note: To prevent accidental changes to speaker function there is a Green/Red button ( 6 ) at the
top of the function column. You must click this button to Red before you can change speaker
functions. When you are finished with the function column you should click the button back
to Green.
When you make your function choices the system will assign default Crossovers ( 7 ) to protect
the speakers from damaging frequencies. So the next step is to review the information from
your speaker manufacturer to see what crossover frequency and slope they recommend.
Note that crossover slopes are always a function of power. If you have more power that your
speaker recommends you can raise the crossover point to help protect the speaker or use a
steeper crossover slope. The best choice is the contact the speaker maker and ask their advice.
Since Left/Right speaker pairs should have the same crossover parameters, it is handy to avoid
mistakes by linking the channels.