Mackie SP2400 Instruction Manual - All - Page 16

4. Operation SP2400 Quick Start This isn't a substitute for reading the entire instruction manual, which is the only way to fully understand how the SP2400 works. However, the Quick Start provides a quick overview so you can get the SP2400 set up and working right away. Make sure the power switch is off while setting up and making connections to the SP2400. External Switch Settings • The Paging Mic and the Local Mic have +24 VDC PHANTOM power switches. Move the switches down to activate the phantom power if you are using condenser microphones. • The Paging Mic and Local Mic also have GAIN +40dB switches. Leave the switches in the down position when microphones are connected to these inputs. • If you plan on connecting two or more SP2400s together in a system with the EXPANSION IN/OUT bus, use the LOCAL/REMOTE switches to select either the local Program Input source (switches up) or a remote program source from the EXPANSION IN/OUT bus (switches down). The odd-numbered switches (1, 3, 5, 7) select the left inputs, and the even-numbered switches (2, 4, 6, 8) select the right inputs. • If you're using the SP2400 in a stereo configuration, move the STEREO/MONO switches up. If you have a zone configuration planned, leave the STEREO/ MONO switches down (default) to combine the left and right channels into a mono signal. • For stereo operation, assign the same AMP ADDRESS setting to both amplifiers (set the AMP ADDRESS DIP switch #6 to the Master position on one channel and to the Slave position on the other channel). The front panel and remote control panels will operate both amplifiers when they are assigned to the same AMP ADDRESS. For example, if you select Program Input 1 with the Zone A control, Program Input 1 is also selected in Zone B, routing the Program Input 1 left signal to the Zone A (Stereo Left) amplifier, and the Program Input 1 right signal to the Zone B (Stereo Right) amplifier. • For zone operation, assign different AMP ADDRESS settings to each amplifier. The front panel and remote control panels will operate independently for each amplifier and zone. Internal Switch and Jumper Settings Refer to "Internal Settings" on page 13 for more information. • Bus Assign switches are used to assign a program input source to the balanced expansion bus. There are four switches for each program input source: Left (+), Left (-), Right (+), and Right (-). CAUTION : Never assign more than one program source to each of the four expansion bus outputs. • EQ Bypass allows you to bypass the 3-band EQ, which is in the Input 1-4 signal path. EQ engaged is the default setting. • The amplifier can be configured for 8-ohm, 70V (default), or 100V operation via eight jumpers on the amplifier board. Program Inputs Connect any stereo line-level signal source to the Program Inputs 1-4. If you have a music-on-hold requirement, connect a continuous music source to INPUT 1. The DIRECT OUTPUT jacks next to INPUT 1 can feed the signal connected to INPUT 1 to the telephone system. If you have a need for a priority Program Input (e.g., a jukebox), connect it to INPUT 4. Move the AMP ADDRESS switch #7 UP to enable INPUT 4 priority. Set the 3-band EQ controls to the "U" position for now (1K for the FREQ control). These can be adjusted later, if necessary. Paging Mic Input Connect a microphone to the PAGING MIC input. Use either the XLR connector, or the supplied Phoenix-type connector. Set the PHANTOM and GAIN +40dB switches to their appropriate positions. Adjust the MASTER VOLUME up/down buttons so the meter level is at the "0" mark. Set the GAIN control so the meter indication is near the "0" mark when speaking at an average level into the microphone. See "Setting The Vox Threshold" on page 19 for more information. Set the 2-band EQ (LOW and HIGH) to the "U" position. This can be adjusted later, if necessary. SP2400 - 16