Mackie Onyx 820i Owner's Manual - Page 39

Appendix F: Modifications

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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

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Owner's Manual
39
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.