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INSTALLATION & OPERATION
3
Because the amplifiers are capable of delivering
high power from a relatively small physical
package, considerable heat can develop in
cabinets containing several components. A
good rule of thumb to adopt is to provide forced
air cooling in any enclosure containing four or
more electronic components.
SECTION 3
Features
Power Connections
The SMART TA6300 power amplifiers are
specified for operation from 120/240 Volt
50/60 Hz mains supply.
Equipment for domestic (USA) consumption
includes a captive cord with a three pin
polarized plug. DO NOT REMOVE THE CEN-
TER GROUNDING PIN!
In new installations and portable sound systems,
or any situation in which the mains power is
suspect, it is wise to confirm appropriate voltage
and line polarity BEFORE connecting the instru-
ment to power sources.
Thermal Protection
Certain conditions of operation (restricted air-
flow cooling, sustained high power operation
into low impedance loads) can result in a rise in
output device case temperature sufficient to
affect the amplifier’s performance.
Should the heatsink reach 95 C, the output will
automatically be disconnected from the load
(loudspeaker) and will remain disconnected
until the temperature drops below 95 C. The
action of removing the load has the effect of
eliminating output current. This, in turn, results
in an immediate and rapid drop in temperature.
The load will automatically be reconnected
when the temperature drops below 95 C.
Fan Assist Cooling
The SMART TA6300 is equipped with a convec-
tion cooling system utilizing massive heatsink
extrusions and two fans.
Soft Clip Speaker Protection
The SMART TA6300 incorporates Soft Clip
Speaker circuitry. This circuitry prevents the
amplifier from being driven into a hard clip state,
which prevents speaker damage caused by the
amplifier being over driven or into DC state.
Selectable Input Sensitivity
The SMART TA6300 is equipped with selectable
input sensitivity. The factory setting is 1 v for
rated output, .775v and 1.5v are also available.
If you would like to change the setting set by the
factory you may contact the factory for instruc-
tions.
Front and Rear Panel Controls
POWER SWITCH/CIRCUIT BREAKER
To turn the Amplifier ON or OFF, press the right
or left portion of this switch rocker. This switch
also serves to break power in the event of a
surge.
POWER INDICATING LED
This LED when illuminated indicates that the
amplifier is on.
SIGNAL STATUS INDICATORS
Six green LED indicators are normally off with
no signal present and illuminate when signal is
present.
CLIP INDICATORS
Six red LED indicators illuminate when the input
signal levels exceed 3 dB above clipping. Ad-