TL Audio A2 - Manual (Page 13)

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‘compressor on’ switch is engaged. Once the Gain Make Up has been adjusted, use the
Output Level control to set the overall output level of the Ebony A2.
Compressor On.
This switch enables or disables the compressor stage, thus allowing an A/B
comparison to be made between the original untreated signal and the compressed
signal. Any gain make up applied to the signal only becomes active when the
“Compressor On” is enabled. An associated status LED indicates when the
compressor is active. The Gain Reduction on the VU meter will monitor the level of
compression regardless of the compressor stage being active or non active.
Equalisation.
The Ebony A2 equalizer section has three bands, each with a continuously variable cut
and boost control up to plus/minus 15dB. The mid band has a rotary knob to select the
centre frequency and is variable between 150Hz and 7KHz. Remember that there is a
good deal of gain available from the EQ section, and greatly boosting one or more
bands can cause the red Peak LED to illuminate as the Ebony A2 is driven towards
clipping. In this case you need to compensate by bringing down the Ebony A2 output
gain control until the Peak LED is extinguished.
LF Band.
The LF (Low Frequency) band of the equalizer has a shelving characteristic - i.e. it
extends from the selected frequency to the extreme low frequency limit of the
equaliser’s response.
The cut or boost is controlled by a continuously variable, centre-dented, rotary knob -
up to 15dB of cut and boost is available. The slope of the shelf is 12dB/octave.
Mid Band.
The 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 Mid band is selected by a rotary switch from 150Hz to 7kHz. The mid band
possesses a fairly low Q value of approximately 0.5, for a response which results in
effective equalisation without harshness.
HF Band.
The HF (High Frequency) band has a shelving characteristic, complimenting the LF