TL Audio 5051 - Manual (Page 19)

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. The centre frequency of the LM band is selected by a rotary switch from
250Hz to 2.2kHz. The mid bands possess a fairly low Q value of
approximately 0.5, for a response which results in effective equalisation
without harshness.
The amount of cut or boost is again controlled by a continuously variable,
centre-detented rotary knob, with up to 12dB 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.
4.23 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 1.5kHz to 5kHz.
4.24 HF
Band.
The HF (High Frequency) band has a shelving characteristic, complimenting
the LF band. Corner frequency selection is by rotary switch from 2.2kHz to
12kHz.
4.25 EQ
On.
The ‘EQ On’ switch allows the EQ section to be bypassed for comparison of
the equalised and original, unprocessed signal.
4.26 EQ
Pre.
The ‘EQ Pre’ switch places the equaliser ahead of the compressor section in
the signal path. This enables more flexibility in sound, since the compressor
will become more sensitive to any frequencies that have been boosted by the
EQ section. The effect may be compared by toggling the EQ Pre switch.
4.27 Output
Gain.
This controls the level at the 5051output. The nominal level is 0dB at the
centre detented position. This control effectively acts like an output fader, and
is very useful when recording direct to tape or hard disc through the 5051. You