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EQUALIZER OVERVIEW – FEATURES AND GENERAL INFORMATION:
MODEL 442 TWO CHANNEL 15 BAND 2/3 OCTAVE PRECISION GRAPHIC EQUALIZER
The Model 442 features constant Q circuitry with a 3% center frequency accuracy. Special features
include 60MM full range precision Sliders, LED metering, selectable range 6dB or 12dB, active
balanced and unbalanced input/output connectors, RFI filters, variable input level control, passive
bypass switch, clip level indicators, ground lift switch, and selectable line voltage switch.
MODEL 452 SINGLE CHANNEL 31 BAND 1/3 OCTAVE PRECISION GRAPHIC EQUALIZER
The Model 452 features constant Q circuitry with a 3% center frequency accuracy. Special features
include 60MM full range precision Sliders, LED metering, selectable range 6dB or 12dB, active
balanced and unbalanced input/output connectors, and RFI filters. The unit also has variable Hi Pass
(low cut) and Low Pass (high cut) filters, variable input level control, passive bypass switch, clip level
indicator, a ground lift switch, and selectable line voltage switch.
INSTALLATION
The Model 442 and 452 Equalizers are designed for mounting in a standard 19” equipment rack or
one of the many rack type portable cases available on the market. The vertical measurements are 3.2
inches. Both models are 8.5 inches in depth.
POWER CONNECTORS
The Model 442 and 452 Equalizers have internal power supplies and are designed for operation from
120-240 volt, 50-60Hz mains supply. Power consumption is 12 watts. In new installations and port-
able sound systems, or any situation in which the mains power is in question, it is wise to confirm the
voltage and select the appropriate line voltage switch BEFORE connecting the equalizer to power
sources.
INPUT/OUTPUT CONNECTIONS
The Model 442 and 452 Equalizers have three paralleled input and output connectors. XLR and 1/4”
TRS are actively balanced with pin 2 or the tip being Hi (Hot), Pin 3 or the ring being Lo, and Pin 1 or
sleeve being ground. Unbalanced operation requires using the RCA phono connector or use Pin 2 of
the XLR or tip 1/4” TRS as ground.
