Ashdown ABM-EVO IV - Input Controls; Instrument Input and Level; Push Flat;Shape Function; Valve Drive Plus

USER GUIDE
ABM EVO IV
INPUT - There is a single instrument input provided linked to a PASSIVE/
ACTIVE selector switch. The Passive input (switch out) is high sensitivity
and also high impedance to suit the output from PASSIVE basses. The
Active input (switch in) is low sensitivity and lower impedance to suit the
output from ACTIVE basses.
INPUT CONTROL - The INPUT control sets the signal level through the
preamp in conjunction with the INPUT LEVEL VU Meter. This is adjusted
to give a reading of 0VU on the meter for average playing dynamics with
occasional peaks into the red region. Please note that the setting of this
may have to be re-adjusted after modication of the EQ controls.
PUSH FLAT / SHAPE - With this button in its OUT position a xed E.Q. is
superimposed on the preamp to give a bright but punchy character to
the sound. Pushing this button IN returns the preamp to a Flat frequency
response.
This function may also be controlled from a footswitch. For the footswitch
to operate this button must be in its OUT position.
VALVE DRIVE PLUS - This routes the signal either through a clean
Solid State amplication section (control on zero) or through a Dual
Triode Tube amplication/overdrive section in order to add either tonal
character i.e. warmth with the control set at 9 o’clock, a slight edge in the
sound at 12 0’clock through to an increasing degree of Tube distortion/
overdrive as the control is advanced to maximum.