Mackie SR408 / SR568 Owner's Manual - Page 17

SUB INSERTS Point Before: SUB 1-8 mixes , AIR , FLIP . Point After: SUBS 1-8 Faders . Both the SEND and RETURN jacks are balanced, but can accommodate unbalanced TS cables. Signal feeding the SEND jack is also sent to the RETURN jack's normalling pins. With nothing plugged into the RETURN jack, the (dry) SEND signal gets passed along to the rest of the mix output's path. (The jacks are half-normalled.) To insert a serial processor (such as a graphic equalizer or compressor/limiter), simply patch from the SEND jack to the effect's input, and from the effect's output to the RETURN jack, using either balanced TRS or unbalanced TS cables. Since using the SEND jack by itself does not interrupt the mix signal path, it may also be used as a pre-Fader direct output. HEADPHONES Point Before: INSERT (HEADPHONES) . Point After: Your favorite headphones (one set only per jack, conventionally wired: tip = left, ring = right, sleeve = shield.) MAIN INSERTS (BAL/UNBAL) LEFT SEND LEFT RETURN MONITOR (BAL/UNBAL) L AUX SEND (BAL/UNBAL) 1 5 WARNING: The SR40•8's stereo phones jack will drive any standard headphone to very loud levels. When we say the headphone amp is loud, we're not kidding. It can cause permanent ear damage. Even intermediate levels may be painfully loud with some earphones. BE CAREFUL! Always turn the PHONES level all the way down before connecting headphones. Keep it down until you've put the phones on. Then turn it up slowly. Why? "Engineers who fry their ears find themselves with short careers." The SR40•8's headphone amplifiers will drive headphones of any impedance, but for best results (loudest volume), use 60-ohm headphones. L-INSERT, R-INSERT (HEADPHONES) Point Before: PHONES level . Point After: HEADPHONES and MONITOR outputs . Per side, these unbalanced inserts share the send and return on the same jack; tip = send (to device), ring = return (from device), sleeve = common ground. This particular pair of insert points has only one function: Patch in a digital delay here and adjust the delay time so it matches the delay caused by the distance between the console and the stage speakers. This eliminates the slap-back effect of hearing the console first and then the speakers. OO OO OO MAX TALKBACK LEVEL MATRIX A AUX 1-4 MATRIX B AUX 5-8 MATRIX C EXTERNAL MATRIX D L/R ASSIGN TALKBACK MAX SOLO LEVEL MAX PHONES INTERCOM TALKBACK COMMUNICATIONS RIGHT SEND RIGHT RETURN R 2 6 CNTR SEND CNTR RETURN TALKBACK 3 7 L-INSERT R-INSERT HEADPHONES 4 8 MAIN OUTPUTS RIGHT CENTER MATRIX A M PHONES 17