LM Band.
The LM (Low-Mid Frequency) band has a peaking characteristic - i.e. it boosts or cuts
a section of the audio spectrum around its selected centre frequency only.
A sweep control varies the centre frequency from 50Hz to 2KHz. The mid bands
possess a moderate Q of approximatley 1, for a response which results in effective
equalisation without harshness, and also provide a good degree of overlap between the
bands.
The amount of cut or boost is again controlled by a continuously variable, centre-
detented rotary knob, with up to 15dB of cut and boost available at the centre
frequencies. Response curves for the mid bands are also shown in the specification
section of this manual.
HM Band.
The HM (High-Mid Frequency) band is similar in operation to the LM band, except
that the centre frequencies are obviously higher, and concentrated in the critical upper
vocal region of the spectrum. The available frequency range is 500Hz to 18KHz.
HF Band.
The HF (High Frequency) band has a shelving characteristic, complimenting the LF
band. Corner frequency selection is by push switch to 8KHz or 12KHz.
Bypass.
The Equaliser In switch allows the processing to be bypassed for comparison of the
equalised and original, unprocessed signal.
EQ Pre.
The pre switch places the equaliser ahead of the compressor section. Depending on the
EQ settings, the compressor response will be modified. The effect may be compared
by toggling the pre switch.
