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Toa Electronics E-1231 - Single Channel, 28-Band 1/3 Octave Graphic Equalizer

B&H # TOE1231 Mfr # E-1231 US
No Longer Available

The E-1231 from Toa Electronics is a single channel, twenty-eight band, 1/3 octave active graphic equalizer with 12dB of boost or cut, designed to allow clean, accurate audio equalization for stage, studio, or commercial applications.

The unit's filters are designed for minimum phase shift and feature smooth slide controls with center detents for easy and accurate adjustment. The filters are summed in parallel for reliability, so that the failure of one filter does not interrupt operation of the others.

In addition, continuously variable high and low pass filters are provided on the front panel. The high-pass filter has a slope of 12dB per octave and is variable from 15Hz to 300Hz, while the low-pass filter can set for either a 6dB per octave slope or a 12dB per octave slope and is variable from 2.5kHz to 30kHz.

An automatic EQ bypass function provides complete equalization bypass in the event of loss of AC power and an output muting function suppresses turn on/turn-off transients. A security cover is included with the E-1231 to guard against accidental disturbance, or intentional tampering when used in fixed installations.

Twenty-eight filters on ISO 1/3 octave center frequencies from 31.5Hz to 16kHz
High quality, low phase-shift active filters with 12dB boost or cut at each center frequency
Precision calibrated, noiseless slide controls with center detent
Continuously variable high-pass and low-pass filters
Low-pass filter can be set for either 6dB or 12dB slope per octave with In/Out switch
Variable input level control to accommodate a variety of input sources
Equalizer and filter In/Out switches with automatic EQ bypass circuitry in the event of power failure
LED peak indicator for clipping at input or output levels
Includes security cover to prevent tampering with settings
Filter Type Graphic
Number of Channels Single
Inputs Screw terminal
Outputs Screw terminal
Maximum Input Level +20dB @ 1kHz
Frequency Bands 28
Bandwidth 1/3 octave
Range (Boost/Cut) +/-12dB
Maximum Output Level +20dB with 600Ω load
Frequency Response 20Hz to 20kHz, +/-1dB
Dynamic Range Not specified by manufacturer
Noise -94dB
Dimensions (WxDxH) 19" x 12 1/2" x 3 1/2"
Weight 9.9 lbs
Specialties High and low pass filters with 12dB per octave slopes
Toa Electronics E-1231 - Single Channel, 28-Band 1/3 Octave Graphic Equalizer
  • Security Cover
  • 2 x Screws for Security Cover
  • Fuse
  • Five (5) Year Warranty
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