EQ-9131
EQ-9152
EQ-9231

Equilizers

• Single or dual-channel models
• 31-band 1/3-octave equalizer (ISO standard centers) (EQ-9131/ 9231)
• Dual channel 15-band (EQ-9152)
• ±12dB boost/cut per band
• Slider EQ level controls
• Wide frequency response (20 Hz to 20 kHz) and low distortion (<0.01%)
• Selectable 40 Hz low-cut filter
• EQ bypass switch
• Balanced XLR and 1/4" phone input/balanced XLR and unbalanced 1/4" phone output
• Rack mount (1 or 2 rack unit height)

The EQ-9131 (1-channel), EQ-9231 (2-channel) 1/3- octave and the EQ-9152 (2-channel) 2/3- octave graphic equalizers are designed for permanent installation in commercial and professional sound reinforcement applications. All models feature balanced line level inputs and a choice of balanced and unbalanced line outputs. Slider controls allow accurate boost/cut band settings of ±12 dB, and a switchable 40 Hz low-cut filter eliminates subsonic rumble and protects against excessive low frequency damage. Input and output connections are made by either 3-pin XLR  or 1/4" phone connectors. A ground lift switch is provided to isolate signal ground in case of hum or ground loop problems.

A front-panel EQ bypass switch (or lack of AC power) will bypass the equalization circuitry.

The EQ-9131, EQ-9152 and EQ-9231 are packaged in low-profile single and double rack-height cabinets, respectively.
 
 

Technical Specifications
Frequency response	20 Hz to 20 kHz (± 1 dB)
THD	< 0.01%
Signal-to-noise ratio	> 85 dB
Power source	115 VAC @ 60 Hz
Power consumption	20W
Weight	7.7 lbs. (3.5 kg)  8.8 lbs. (4.0 kg) (EQ-9231)
Dimensions (W x H x D)	19" x 1-3/4" x 9-1/2" 19" x 3-1/2" x 11" (EQ-9231)