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The BaSiC UniT
The Basic Unit
The basic unit consists of the following functions and features:
• all controls and toggle switches
• ten mounting slots for input/output modules
• two volume control knobs
• display (switchable)
• digital level display/level control
• tape loop
• input terminals
• output terminals
• IR receiver
The necessary amplification circuits are part of the modules and the power supply is
located in an external housing.
Controls and toggle switches
The desired input module can be selected with the SELECTOR knob (3). The input
signal of the selected module is always available at both output modules.
The toggle switch MONITOR/SOURCE (4) allows a comparison between the source
signal and the recorded signal while taping. A direct comparison between the
recorded signals on two separate tape recorders can be made by throwing the toggle
switch MONITOR 1/MONITOR 2 (5).
The switches OUTPUT 1 (20) and OUTPUT 2 (21) determine, which output module
feeds its signal to the output terminals, in other words, which of the connected power
amps or active speakers the preamp will drive. This makes a direct comparison
between various power amps/active speakers possible.
Switches for sources, tape loop and output are not in the signal path but activate via a
control voltage relays in the modules or in the basic unit. These relays then do the
switching. The rationale for this rather involved design is to shorten the internal signal
paths to the technically achievable minimum.
Mounting slots for the modules
The basic unit offers a total of ten mounting slots for modules:
• six for input modules
• two for output modules
• two for SYM OUT modules which are necessary to upgrade the modules OUTPUT 1
and 2 for balanced operation (see also "The Flow Chart" on page 8).
CaUTion:
Never plug an output module into an input slot and vice versa!
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