The
is a programmable memory mixer. This lets you accurately recall previous settings
without having to manually reset every control. The memory system is structured specifically
for live performance. Three types of memory are provided :
•
memories store the settings associated with how the mixer is set up for the
performance venue. This includes the amplifier configuration and graphic EQ settings.
•
memories store the settings which are likely to change between songs or scenes. This
includes the EQ, dynamics, effects, mutes and mix pan and level settings.
•
memories store the sequence of song memories for recall during live performance using
panel or foot switches. A ‘set’ is the play list or order in which songs are to be performed.
The memories also apply in theatre where scenes can be sequenced according to a cue sheet, or
in multi-function venues such as clubs, schools and houses of worship where settings change
according to event or user.
There are 19 Venue, 127 Song and 9 Set user memories. A special song memory known as the
patch toggles the mixer between the current settings and an alternative setting. This is
normally used for intermission chat between songs where it may be desirable for example to
reduce the level of effects and mute some of the channels. Alternatively it could be used to
toggle between two alternative settings for comparison, or used as a scratchpad memory. Panel
and footswitch control is provided. Changes made to the current and pause patches do not need
to be stored. These settings and the contents of the memories are saved when the mixer is
turned off.
Each user memory can be given an 8 digit name which is displayed in large characters during
performance. Selected memories can be locked for recall only so preventing accidental
overwriting. An 8 digit user name can be entered for mixer and data archive identification.
MIDI in and out sockets are provided so that memories can be recalled using MIDI program
change messages, individual channels can be muted using note on/off messages, and the user
memories can be archived using system exclusive MIDI dump. The RS232 connector allows
connection to the serial port of a personal computer for data archiving and downloading of
future software releases. Refer to the Allen & Heath Internet web site for the latest information
and software. A rear panel selector switch determines whether the MIDI or RS232 interface is
active.
Two power amplifiers are included in the
powered mixer. These each produce a
maximum of 300 Watts into a minimum 4 ohms impedance. Outputs A and B benefit from the
10-band graphic EQ and are fed to the amplifier inputs. These can be configured in one of
three ways: stereo PA, mono PA with foldback monitor, or a larger system with two monitors
and an external PA amplifier. Speaker connections are the standard Speakon
®
type. The
amplifier and associated power supply are a linear design with metal cased bi-polar power
devices to ensure signal clarity and on the road reliability. Heat is dissipated and removed from
the unit using a 3-speed fan which sucks air in from the front of the unit, blows it over the
circuits and down a purpose designed extruded heatsink funnel to the exhaust vents in the side.
The fan blows briefly at full speed on power up to test and clear the system, then slows to idle
speed until a rise in temperature is detected. Loudspeaker protection is provided by relays
which disconnect the speakers if DC or excessive temperature is detected. These relays also
delay speaker turn on for a few seconds on power up to allow the amplifier circuits to stabilise.
A current limit circuit protects the amplifier from excessive loading or short circuits.
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