Crest Audio UMA 4300, Owner'S Manual

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9
Dimensions:
19” x 13.25” x 3.45” with rack ears (483 mm x 337 mm x 88 mm)
17” x 13.25” x 3.45” without rack ears (432 mm x 337 mm x 88 mm)
Color:
Black
Architectural and Engineering Specifications
The mixer/amplifier shall have 4 electronically balanced mic/line inputs. The front panel shall include four input level controls
and a master output level control. The gain of the input preamps shall be continuously variable with the controls located on the
rear of the unit. Front panel indicators shall include channel signal, clip and priority mute condition, power on, signal presence
at the amplifier, ACL ™ status and master mute status. It shall have an internal power amplifier with rated output of 300 Watts.
The power switch shall be on the rear panel along with the detachable IEC cord inlet. There shall be four inputs with Euro-type
connectors for the balanced input connections. Channels 3 and 4 shall have a switch to select between the balanced input or dual
summing RCA connectors. The mixer shall have switches to apply 48 Volt phantom power to Input 1 and to inputs 2 and 3.
Additionally, an electronically balanced output with a Euro-type connector and a separate level control shall be provided with a
switch to select between the mixer output or channel 4 input signal. Channel 1 shall have a continuously variable mute threshold
control on the rear panel. Setting this control fully clockwise shall defeat the Channel 1 mute function. The mute threshold
sensitivity for Channel 1 shall be increased as the control is turned clockwise. When the signal level in Channel 1 exceeds the
mute threshold, Channels 2-4 shall be muted. The master section shall include rear panel bass and treble EQ controls, each with
a ±10 dB range of operation. The capability to insert an external device shall be included via Euro connector. A link switch shall
bypass the insert point. The unit shall have a line voltage selector switch for operation at 100 - 120 VAC or 220 - 240 V 50/60 Hz.
The mixer amplifier shall have a direct 4 Ohm output, and 3 transformer outputs – 100 Volt, 70 Volt, and 25 Volt. The amplifier
shall include clipping protection via ACL ™ . The unit shall be W x D x H 19” W x 13.25” D x 3.45” H with rack ears (483 mm
W x 337 mm D x 88 mm H) and 17” W x 13.25” D x 3.45” H without rack ears (432 mm W x 337 mm D x 88 mm H). The unit
shall be called the Crest Audio Professional Installation Series Power Amplifier model UMA 4300.