LA Audio Electronic EQ231G-SP user manual Introduction, Options

User Manual

1. Introduction

1. Introduction

The EQ231G-SP is a high quality dual 31-band 1/3 octave graphic equaliser including variable Hi and Lo-pass filters, Shelving EQ, Gate and Limiter.

The Graphic Equaliser features centre detented, 45mm faders which give up to 12dB of cut and boost at 31 ISO centre frequencies, covering the entire audio spectrum (20 to 20KHz).

The Hi-pass filter uses 4th order bi-quadratic topology giving a 24 dB/octave slope with corner frequency variable from 16 Hz to 160 Hz.

The Lo-pass filter is a 2nd order design (12dB/octave) with the corner frequency variable from 3KHz to 32KHz.

The Shelving Equaliser faders enable control of the amount of cut or boost, a centre detent is provided at 0dB. Two rotary potentiometers enable control of the LF and HF shelf frequency.

A bypass switch allows the whole section to be taken out of circuit.

The Dynamics section uses a fast RMS detector with soft-knee action. The Limiter has a 3 segment LED gain reduction display.

The Gate has an LED indicator illuminating when the signal is below threshold.

A delayed by-pass relay allows silent on/off switching and also provides direct throughput when the unit is not powered.

Inputs and outputs are electronically balanced. Each channel has a Peak Indicator illuminating for an equivalent output signal of +18dBu.

Options

The unit can be augmented by parallel outputs offering a unique transformer distortion cancellation circuit. This reduces distortion by an order of magnitude compared to conventional designs and also provides galvanic isolation from connected devices for the reduction of interference and hum.

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