Rear Panel Facilities - Ashdown ABM Operating Instructions Manual

Rear Panel Facilities

ABM, MAG & ELECTRIC BLUE
300 / 500 WATT ABM HEAD / COMBO
900 WATT ABM HEAD / COMBO
LINE INPUT (ABM only)
The rear panel has a Line Input socket for connection of other signal sources into the system. This can be
used for plugging a CD, Tape or MiniDisc player into the amplifier for practising or rehearsing or for
connection of a second preamp into the system.
EFFECTS SEND / RETURN (rear panel on ABM & front panel on MAG & Electric Blue)
A serial effects loop is provided at a level of 0dB. The Effects Send and Return sockets for this are on the
rear panel of the ABM and front panel of the MAG and Electric Blue below the D.I. socket. The EFFECTS
SEND socket can also be used as a Line Out socket if required. The signal path through the preamp is only
broken when a jack plug is inserted into the EFFECTS RETURN socket.The EFFECTS SEND is situated
after the EQ,Valve section and Sub Bass Processor (after the EQ on the Electric Blue).
MUTE FOOTSWITCH SOCKETS (ABM only)
Two jack sockets, marked OUTPUT and SUB, are provided for connection of foot switches to operate the
Output Muting and the Sub Harmonics facility – these operate as follows. The OUTPUT foot switch
operates in the same way as the PUSH TO MUTE button on the front panel (see relevant section) and
mutes the output when closed. The SUB foot switch mutes the SUB HARMONICS when closed. For this
to operate, the SUB HARMONICS must already be activated with the front panel push switch.
EQ / SHAPE FOOTSWITCH SOCKETS (ABM only)
A single stereo jack socket is used for connection of a dual foot switch for remote switching of the EQ
(Graphic) and SHAPE (Push Flat) facilities. The TIP connection of this socket operates the EQ and the
RING connection the SHAPE. For this footswitch to operate, the front panel push switches for PUSH FLAT
and GRAPHIC must be in their OUT position.
CROSSOVER AND OUTPUTS (Rack Preamp RPM1 only)
The BASS MAGNIFIER RACK PREAMP RPM1 has a built in high precision CROSSOVER with separate jack
socket outputs for the HIGH PASS and LOW PASS signals. Crossover frequency is adjustable from 35Hz to
160Hz with a level control for the LOW PASS output to adjust the balance between LOW and HIGH
outputs signals. There is also a FULL RANGE jack line output provided. This section is provided with
switched output levels for simplified connection to power amplifiers that require either a 0dB or +4dB
signal level. This switches the levels of all three outputs.
SPEAKER OUTPUT (except Rack Preamp RPM1)
The Speaker Output sockets are also situated on the rear panel of the unit.