Motion Sound MS-1771 - Manual

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MS-1771 User Guide
MS-1771 MS-1771W
• The MS-1771 is a high powered bi-amped rotary speaker system deigned for use with console Organs.
Modern technology is used in both electronic and mechanical design providing a maintenance free reliable
rotary speaker system. All critical screws are threaded into steel inserts for strength and tightness.
• The “Polymaric™” proprietary polymer finish is extremely rugged and appropriate if some physical contact
is likely. Clean as needed with mild soap and water. Wood models should be cared for like fine furniture. Use
light cleaners and quality polish. Wood finish models are less tolerant of physical damage.
• The power supply, motor drivers, and audio power amplifiers are on a single main chassis PC board.
• Once the MS-1771 has been installed and tonally adjusted, general cleaning and care of the cabinet is all that
is required for long term trouble free operation.
Caution! Hazardous voltages are present inside amplifier components.
Caution! The MS-1771 can produce high sound pressure levels.
Connection to Organ
• Connect the MS-1771 and the Organ to the same AC outlet if at all possible. Some buildings have wiring problems
with grounds and polarity that can cause “hum” or even damage to the MS-1771. If you are unsure of your buildings
wiring have a technician test power and grounds before you connect the MS-1771.
• Do not change any settings on the MS-1771 without reading the information below.
The MS-1771 supports the industry standard 11 pin cable connection to an 11 pin compatible Organ. With the Organ off
and the MS-1771 standby power switch off connect the 11 pin cable between the Organ and MS-1771. Plug the MS-
1771 into rated AC power and turn the standby switch on. The upper LED on the amplifier chassis will illuminate. Turn
the Organ on, the lower LED also illuminates indicating the MS-1771 is on and ready. Play some music with the Organ
volume at about 25% noting the sound level. As all Organs are different you can adjust the volume and tone as indicated
below to suit the venue. We strongly recommend that a trusted listener help during any tonal adjustments.