Thank you for purchasing the Automix
automatic mixer with eight transformer balanced mic/line inputs. Each channel provides a gain
control, 48 Volt phantom power (mic inputs), low cut filter, activity/clipping LED, an Aux send control
and a choice between manual or automatic operation. Each channel also provides a defeatable
insert point, 5 Volt TTL status output and can be muted individually or multiple channels can be
muted simultaneously via an assignable mutebus. In addition, channels one and two provide an
adjustable priority control.
The master section provides a gain trim control, three 1/9 octave sweepable notch filters, a
downward expander, transformer balanced outputs (main and aux) and remote volume connections.
2 has been designed to easily link multiple units together to form a single mixer with
many more inputs (16, 24, 32...). The Automix 2 is supplied with a see-through plexiglass security
panel to prevent changes to the installerÕs settings.
THEORY OF OPERATION
FRONT PANEL FEATURES
Manual Mode: In the manual mode the channel level controls provide 6dB of gain and 50dB
Auto Mode: In the auto mode the control still provides 50dB of attenuation, but the control
does not add gain to the overall system level. Instead, when the level is adjusted above Ò0Ó,
the other channels are attenuated to make the channel being adjusted sound louder in the
mix without adding to the system gain.
The master level controls the overall output level. The range is set for 10dB of gain above,
and 40dB of attenuation.
2! The Architectural Acoustics Automix
2 is a high quality