Front Panel Features
Input Level Controls
The front panel is split into 4 sections, one for each mixer amplifier. The level controls for each amplifier
are labelled Mic-Line 1 through to Mic-Line 3. These level controls are used to set up a suitable “mix” of
all the various input sources connected to each amplifier, for example microphones, CD players, cassette
decks. If a master level control is desired per amplifier, an external 500K pot can be connected (per
amplifier) to the rear panel for remote control of the master level of each amplifier.
Bass Control
Each amplifier within the AMIS604 includes a recessed, screwdriver adjustable 2 band equalisation system.
The Bass control allows the user to increase or decrease the amount of bass in the system. The control
allows for 12dB of cut or boost at 100Hz. If no bass cut or boost is required, the control should be in the
centre position.
Treble Control
Each amplifier within the AMIS604 includes a recessed, screwdriver adjustable 2 band equalisation system.
The Treble control allows the user to increase or decrease the amount of treble in the system. The control
allows for 9dB of cut or boost at 10kHz. Generally, a small increase of the treble control makes a system
sound ‘brighter’. If no treble cut or boost is required, the control should be in the centre position.
VCA Master Control
For applications requiring remote level control, provision has been made on the rear panel of the AMIS604
to connect an external 500K pot for remote control of the master level of each amplifier.
Power Switch & “On” LED
The black rocker switch on the right hand side of the front panel is used to switch the amplifier “on” and
“off”. The ‘up’ position is “on”. When the amplifier is connected to an appropriate AC power source and is
switched “on”, the blue “on” LED will illuminate. This switch will not turn DC power on or off in DC
operation. In DC operation mode, the amplifier is always on and the blue power LED will always be
illuminated.
Signal LED’s
The four green “Signal” LED’s located next to the ‘On’ LED indicates that the AMIS604 is passing audio.
One LED is provided per amplifier. The signal LED is a simple method to trouble-shoot installations
especially in multi-amplifier projects.
Rack Mounting
The AMIS604 is supplied with rack ears attached to allow mounting within a standard 19” equipment rack.
As is the case with almost all audio products, adequate ventilation and air flow is required. When installing
multiple AMIS amplifiers within the one rack, it is recommended that at least 1 rack unit of ventilation
space is left between every two amplifiers. For table or shelf mounting, the rack ears can be removed using
a screwdriver. Once the rack ears are removed, please reinstall the screws.
