Mackie CR1604 Modifications - Page 12

Mix-B Source Mod This modification changes the tap point of the Mix-B Source switch (engaged) from prefader/pre-mute to post-fader/post-mute. It must be done on each channel. For example, if you have a 24•8, the modification must be done on all 24 input channels. See Figure below. This modification takes place on each channel strip in an area under the Mix-B Source switch. 1. Remove power cable. 2. Cut the conductor at Point G. 3. Add a jumper at Point H. 4. Repeat for all input channels. Mix-B Mute Mod This modification converts the Mix-B Source switch to a Mix-B MUTE switch. The switch will no longer be able to source the channel signal. This modification must be done on each channel. For example, if you have a 24•8, the modification must be done on all 24 input channels. See Figures below. This modification takes place on each channel strip in an area under Mix-B Source switch. 1. Remove power cable. 2. Cut the conductor at Point G. 3. Add Jumper to point H. 4. Repeat for all input channels. BEFORE cut here (G) BEFORE cut here (G) AFTER add jumper (H) AFTER add jumper (H) Mix-B Source Modification 12 Mix-B Mute Modification