Front Panel Facilities - Ashdown ABM Operating Instructions Manual

Fro nt Panel Facilities
ABM, MAG & ELECTRIC BLUE
ABM
MAG
Electric Blue
INPUTS
There are two choices of instrument input, these are marked HIGH and LOW.The HIGH input is high
sensitivity and also high impedance to suit the output from PASSIVE basses.The LOW input 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 (Electric Blue uses a LED display).This is adjusted to give a reading of 0VU on the meter (yellow
LED on Electric Blue) for average playing dynamics with occasional peaks into the red (red LED on Electric
Blue) region.
INPUT MIX CONTROL (ABM only)
This routes the signal either through a clean Solid State amplification section or through a Dual Triode
Valve / Tube amplification section to add either tonal character, i.e., warmth, or depending on how far the
control is advanced, a degree of Tube distortion. A Mix of these two amplification sections can be achieved
with this control.
N.B.The degree of tube distortion with this control turned fully clock wise will also depend on the setting
of the INPUT control.
PUSH FLAT / SHAPE (ABM only)
With this button in its OUT position a fixed 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 facility is also footswitchable on the ABM range via a socket on the rear panel.
DEEP (Electric Blue & MAG)
With this button IN, a fixed E.Q. is superimposed on the preamp to give a BASS boost to the sound.This
gives +8dB at 50Hz.
BRIGHT (Electric Blue & MAG)
With this button IN, a fixed E.Q. is superimposed on the preamp to give a TREBLE boost to the sound.
This gives +10dB at 10kHz.