Crown 28M Rack Mountable 8x2 Preamplifier Mixer

Crown 28M


The 28M, part of the Commercial Audio Series from Crown Audio, is a rack-mountable preamplifier/mixer ideal for use in factories, schools, hospitals, restaurants, offices, and other venues. It features eight mic/line inputs with stereo RCA jacks and balanced phoenix-type connectors and two outputs with balanced phoenix-type connectors. Priority muting is included for paging.

RM 3,XXX


Individual volume, bass, and treble controls are provided for each input. LED signal indicators are provided for each input and the output. A built-in tone generator provides bell, pre-announce chime, alert, and evacuate tones.
Eight input channels, each with stereo RCA jacks and balanced phoenix-type connectors
Two output channels with balanced phoenix-type connectors
Each input may be assigned to any combination of outputs
Priority muting for paging
Built-in four tone generator
Signal indicator LEDs
Level, bass, and treble controls for each input
Phantom power


Specifications

Frequency Response 20Hz - 20kHz
Signal to Noise Ratio 100 dB
Total Harmonic Distortion (THD) 0.05% (Typical)
Input Sensitivity Balanced Mic: 3mV
Balanced Line: 800mV
RCA: 400mV
Input Impedance Mic: 400 ohms
Line: 100 k ohms
RCA: 50 k ohms
Crosstalk -50 dB
Output Level 1.2V
Phantom Power 15VDC
Controls Front Panel 1 x Power Switch
8 x Input Volume Control Knobs
8 x Bass Controls
8 x Treble Controls
2 x Output Volume Control Knobs
Controls Rear Panel 1 x Mixer Config. DIP Switch (For Priority Muting and Phantom Power)
8 x Mic/Line Selector Switches
2 x Output Tone Control Potentiometers
16 x Input Routing Dipswitches
Indicators Green LEDs for Input and Output Signals on Front Panel
Red Clip Indicator LED
Blue Power Indicator LED
Connectors 1 x AC Power Inlet
1 x 2-Position Terminal Strip (24VDC Backup Power)
1 x 3-Pin Phoenix Connector for Priority Muting
2 x 3-Pin Balanced Phoenix Output Connectors
1 x 5-Pin Phoenix Connector for Tone Generator
8 x Balanced 3-Pin Phoenix Input Connectors
8 x RCA Stereo Input Pairs (16 Jacks Total)
Dimensions (WxHxD) 19 x 1.75 x 10.7" (483 x 45 x 272mm)
Weight 8.7 lbs (3.9 kg)
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