Appendix F: Modifications

The following modifications can be carried out on the Onyx 820i by an authorized service center. Authorized service centers may be found online at: www.mackie.com/scripts/service_centers/search.asp Please contact our technical support department if you are having trouble finding an authorized service center in your area.

The block diagram on page 33 shows these modifications as dotted lines in the channel signal flow.

Modifications: Post-Insert FireWire Sends

The pre-EQ channel FireWire sends are pre-insert, but the circuit board can be modified so that they are post-insert instead.

For example, this allows for the use of an external processor on the mic signal, sending the result to the FireWire, while still being pre-EQ.

Modifications: Post-Fader FireWire Sends

The post-EQ channel FireWire sends are pre-fader, but the circuit board can be modified so that they are post-fader instead.

This allows the channel level to control the level of the FireWire sends.

Modification: Pre-EQ Aux Sends

The pre-fader aux sends are post-EQ, so they are affected by the channel EQ controls. The circuit board can be modified so the pre-fader aux sends are pre-EQ instead of post-EQ.

For example, your stage monitors will not be affected by any channel EQ adjustments.

Owner's Manual 39