Mackie SR408 / SR568 Owner's Manual - Page 12

PATCH PANEL At the risk of stating the obvious, this is where you plug everything in: microphones, instruments, effects, headphones, and the ultimate destination for your sound: PA system, tape recorder and the like. E-Z INTERFACE Concerned about levels, balancing, impedances, polarity, or other interface goblins? Don't be. On your SR40•8, you can patch anything almost anywhere, with nary a care. Here's why: • Every input and output is balanced (except single-jack inserts, phones and RCA jacks), using close-tolerance components to ensure noise-free performance. • Every input and output will also accept unbalanced lines (except floating-ring cables into XLR inputs - just tie the cable's ring to the shield first). • Every input is designed to accept virtually any output impedance. • The XLR outputs can deliver 28dBu into a 600 ohm load. • All the other outputs can deliver 22dBu into a 600 ohm load. • All the outputs are polarity-correct with the inputs. All we ask is that you perform the LevelSetting Procedure every time you patch in a new sound source. So stop worrying, and start mixing! MIC INPUT Point Before: Balanced microphone-level cable with male XLR connector (pin 2 = hot, pin 3 = cold, pin 1 = shield). Point After: Channel . The female XLR input can accept almost any type of microphone - dynamic, condenser, ribbon or tube condenser. +48 PH (phantom power) is switchable per Channel. Radio frequency interference (RFI) is eliminated by means of close-tolerance balanced circuitry, input filtering and the SR40•8's steel chassis. Mic-level signals can be boosted by as much as 60dB. Do not use this input simultaneously with its associated LINE IN . Turn TRIM down and engage MUTE before inserting or removing mic cables. Do not insert unbalanced single-ended cables (signal on pin 2, pin 3 open) unless pin 3 is first tied to ground (pin 1), and the +48 PH is switched off. 25 DIRECT OUT SUB 1 SUB OUTPUTS SUB SUB 2 3 SUB 4 SEND SUB INSERTS (BAL/UNBAL) 1 RETURN SEND 5 RETURN INSERT SEND SEND 2 RETURN SEND 6 RETURN INSERT RETURN LINE IN SUB SUB 5 6 SUB 7 SUB 8 SEND 3 RETURN SEND 7 RETURN SEND 4 RETURN SEND 8 RETURN MIC 25 DC POWER IN (MACKIE 400-WATT POWER SUPPLY !) MIDI IN MIDI OUT TALK BACK MIC PHANTOM POWERED INTERCOM DATA LEFT 12