User manual BIAMP MXA SERIES

[. . . ] MXA Series Mixer/Amplifiers Operation Manual IMPORTANT SAFETY INSTRUCTIONS 1) Read these instructions. 5) Do not use this apparatus near water. 7) Do not block any ventilation openings. Install in accordance with the manufacturer's instructions. [. . . ] Auto Mute Sensitivity: This control adjusts the level at which signals from "priority" channels will automatically trigger muting of selected non-priority channels (see DIP Switches on next page). To increase auto mute sensitivity, turn this control clockwise. Mute/Chime: This terminal (plus the adjacent terminal) allows manual muting of selected channels via an external switch or contact closure (see DIP Switches on next page). When the Chime Level control is turned up (on), a pre-announcement chime tone will also be activated by the switch or contact closure. 2 FRONT & REAR PANEL FEATURES Remote Level Control: These two terminals (plus the adjacent " " terminal) provide remote volume control of the master level. An internal voltage controlled amplifier (VCA) allows remote control from up to 2000 feet away, using any 5k~50k linear taper potentiometer and/or switch to provide adjustment and/or muting of the master level. Potentiometers are wired with high-side to (+10V), low-side to ( ), and wiper to (C). Mute switches simply connect (C) to ( ), with no (+10V) connection required. Music On Hold Level: This control adjusts the volume level of a Music On Hold output (see below). To turn the output off completely, set this control to the counter-clockwise position (min). Music On Hold Output: These three terminals provide a balanced line-level output as a source for phone systems. This signal is derived from input channel 6. For unbalanced output, wire high to (+) and ground to ( ), leaving (-) unconnected. Pre Out & EQ In: These two RCA jacks provide pre-tone patching for external equipment. When used as an 'insert point' for external signal processors, set the associated Link switch to the (off) position. When using Pre Out for recording and/or EQ In for stacking, the Link switch may remain in the (on) position. Line Out & Amp In: These two RCA jacks provide post-master patching for external equipment. When used as an 'insert point' for external signal processors, set the associated Link switch to the (off) position. When using Line Out for external amps and/or Amp In for stacking, the Link switch may remain in the (on) position. Low Cut: This switch controls a low-cut filter (12dB/octave @ 125Hz) at the amplifier input. CAUTION: To avoid output fault conditions, Low Cut must be used when driving 25/70/100 Volt speaker systems (see Installation Instructions on pg. Also, any other system equalization affecting frequencies below 125Hz should remain flat or be used as cut-only. This also precludes boosting of the Bass control (see above) in these applications. [. . . ] 8) Apply a heat source such as a heat gun or match to the heat shrink tubing until it shrinks onto the lug/wire. 9) Reassemble the lugs and screws to the 100 volt tap and Com connections. 10) Replace the safety cover and screws. This completes the safety modification. M4 ring lugs P-Clip as provided crimped to wire with heat shrink tubing added Figure #1 class 3 wiring 100V 70V 25V com class 2 wiring xfmr input 4 gnd Figure #2 5 SPECIFICATIONS 6 BLOCK DIAGRAM 7 WARRANTY BIAMP SYSTEMS IS PLEASED TO EXTEND THE FOLLOWING 5-YEAR LIMITED WARRANTY TO THE ORIGINAL PURCHASER OF THE PROFESSIONAL SOUND EQUIPMENT DESCRIBED IN THIS MANUAL 1. [. . . ]