Copyright 1997 by SMART Devices, Inc.
5945 Peachtree Corners East
Norcross, GA 30071-1337
TA6300 SIX CHANNEL POWER AMPLIFIER
INSTALLATION & OPERATION MANUAL
TABLE OF CONTENTS
SECTION 1 INTRODUCTION ..................................................... 2
SECTION 2 INST ALLATION ..................................................... 2
SECTION 3 FEATURES ..................................................... 3
SECTION 4 SPECIFICA TIONS ..................................................... 5
SMART products are designed to deliver unsurpassed quality in workmanship and performance.
The following information gives detailed instructions on the installation and operation of the
SMART T A6300 Power Amplifier . We strongly encourage new owners of the T A6300 to thoroughly read this entire manual before placing their new SMART products into service. This will
ensure that the T A6300 will be operated properly to give the superior performance that it was
designed to deliver.
For service or installation assistance, please call our T echnical Support Department between the
hours of 8 a.m.-5 p.m. E.S.T ., Monday - Friday
1-800-45-SMART
LIMITED WARRANTY: SMART products and accessories are warranted against malfunction or failure due to defects in workmanship or
materials for a period of one year from the date of shipment. If a problem occurs during the warranty period, the unit will be repaired, or
replaced at our option, without charge for materials or labor. If air frieght is requested by the dealer, the difference between air and
surface charges will be billed to the dealer. This limited warranty does not cover products that have been abused, altered, modified, or
operated in other than specified conditions. Prior factory approval is required on all returns. Returned equipment or defective parts must
be shipped freight prepaid to us by the dealer or customer.
Our limited warranty doesn not cover damages resulting from accident, misuse or abuse, lack of responsible care, or failures not attributable to manufacturing defects, except as provided herein. SMART Devices, Inc. makes no warranties, express or implied, including
warranties of merchantability or fitness for a particular purpose.
RETURN POLICY: Factory autorization MUST be obtained before returning any product. A 15% restocking charge will be issued on unused
equipment (in original box) that is returned for credit. Credit is issued to the dealer’s account. The credit may be used against future
pruchases and no cash transactions are offered. All returns must be shipped freight prepaid by the dealer. Equipment returned without a
factory RA (Return Authorization) will be refused.
TA6300 6 Channel Power Amplifier
SECTION 1
Introduction
The SMAR T model TA6300 is a professional sixchannel amplifier featuring DC protection, quick
interconnect with SMART companion products,
soft clip speaker protection and massive heatsink
extrusions with internal D.C. fan assist to make
sure your amplifier stays cool even when the
music is hot. T A6300 deli vers 200 watts per
channel into 8 ohms on five channels simultaneous with 400 watts into 4 ohms on the sixth
(subwoofer) channel.
Circuit Description
T o assure absolute long-term reliability , the
output section of each channel incorporates
multiple Motorola Po wer T ransistors, which
provide three times the amplifiers rated power in
watts of dissipation per channel. T he output
stage is arranged in a fully complementary
format for class AB/2 operation. T he bias current
is evenly distributed among all output devices.
Bias thermal compensation is accomplished by
thermally mating a bipolar semiconductor
junction to the heat-producing output device.
T riple diffused high power driver transistors are
employed along with high speed, high voltage
silicon annular devices for the pre-driver and
inverter stages. Utilization of these components
provide the required separation of FT break
points for absolute stability . Fully complementary drive and loading is utilized throughout.
Only 20dB of negative feedback is used to
reduce forward transfer distortion to minimum
levels. VI type energy limiters are incorporated
for short circuit protection of the amplifier . Due
to the unusually large safe operating area of
output stage, the limiters do not actuate until
driving a forty-five degree reactive load of under
2 ohms at full power .
Construction
The amplifiers are designed on an all-modular
concept permitting rigorous pre-assembly module testing and maximum service accessibility .
Each functional module is fully tested before
final assembly . Although components of the
highest quality are used throughout, each amplifier is burned in, prior to shipment, at the worst
case operating point to eliminate any possibility
of component malfunction. All c hassis components are precision machined from high quality
aluminum and 16-gauge sheet steel stock. T he
entire package concept is directed toward
maximum efficiency of space and structure,
accounting for the compact size and light
weight.
SECTION 2
Installation
All SMART amplifiers are designed for mounting
in a standard 19-inch equipment rack, or many
of the 19-inch rack type portable cases available. T he T A6300 require 7 inches of v ertical
panel space, with 15" inches required behind
the panel. T otal depth including the handles is
16-3/8" inches. F ront panels are machined from
solid aluminum stock, with a black powdercoat
finish and sturdy rack mount handles.
Placement of the amplifier is not critical for
normal operation, provided sufficient airflow is
allowed to reach the heatsink arra y . If the unit is
to be placed on a shelf, or a similar unenclosed
area, allow four inches of clearance behind the
fan air intake to permit airflow through the arra y .
If the amplifier is to be mounted in an equipment
rack or cabinet with heat producing equipment,
be sure that environmental operating temperatures do not exceed 55 degrees C (131F).
Should overheating occur because of inadequate ventilation, the temperature protection
circuitry will automatically protect the amplifier .
When a safe operating temperature is restored,
the amplifier will return to normal operation.
2
Because the amplifiers are capable of delivering
high power from a relatively small ph ysical
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
Po wer Connections
The SMAR T T A6300 power amplifiers are
specified for operation from 120/240 V olt
50/60 Hz mains supply .
INSTALLATION & OPERATION
when the temperature drops below 95 C.
Fan Assist Cooling
The SMAR T T A6300 is equipped with a con vection cooling system utilizing massive heatsink
extrusions and two fans.
Soft Clip Speaker Protection
The SMAR T T A6300 incorporates Soft Clip
Speaker circuitry . T his 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
Equipment for domestic (USA) consumption
includes a captive cord with a three pin
polarized plug. DO NOT REMO VE THE CENTER 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 instrument 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. T he
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
The SMAR T TA6300 is equipped with selectable
input sensitivity . T he 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 instructions.
Front and Rear P anel Contr ols
POWER SWITCH/CIRCUIT BREAKER
T o turn the Amplifier ON or OFF , press the right
or left portion of this switch rocker . T his switch
also serves to break power in the event of a
surge.
POWER INDICA TING LED
This LED w hen illuminated indicates that the
amplifier is on.
SIGNAL ST A TUS INDICA T ORS
Six green LED indicators are normally off with
no signal present and illuminate when signal is
present.
CLIP INDICA T ORS
Six red LED indicators illuminate when the input
signal levels exceed 3 dB above clipping. Ad-
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TA6300 6 Channel Power Amplifier
just the source level control to minimize clipping.
12 POSITION PHOENIX INPUT CONNECTION
The six unbalanced inputs are connected via 12
position phoenix connector . T he pinouts are
labeled on the rear of the TA6300.
AC POWER CORD
The T A6300 is pre-wired at the factory for the
voltage indicated on the rear panel or on the
power cord of the amplifier . Plug the power
cord into an A C outlet that will deliver the
proper voltage and current for amplifier operation.
GROUND LIFT SWITCH
The GROUND/LIFT is pro vided to eliminate
ground loops between this amplifier and a
preamplifier that can occur in certain installations.
OUTPUT CONNECTIONS
Output connections are via five-way binding
posts, identified as to polarity with red and black
terminals. W e suggest the use of dual banana
plugs as a convenient and reliable method of
hook-up. They allo w rapid removal for polarity
reversals. This feature is often necessary in the
check out and adjustment of multi-element
biamplified and triamplified sound systems.
Heavy Class 11 wire may be used by unscrewing the large plastic portion of the output terminal and inserting the wire into the hole provided.
Note: It is extremely important when making
wire connections that no wire stand or end
touches an adjacent terminal!
A 9 pin D-type subminiature connector is provided for quick connection to SMART’s MN600
Cinema STEREOCHECK booth monitor through
a standard 9 pin D-type male to female cable.
CA UTION:
The T A6300 amplifier is a product of the most
advanced technology and manufacturing techniques and is fully protected against overheating, input overload and shorted or mismatched
loads. As is the case with any precision instrument, some care should be taken in the unit’ s
operation. T he following precautions should be
noted and adhered to. Damage resulting from
their omission is not covered under the terms of
the warranty .
DO NOT P ARALLEL THE OUTPUTS OF ANY
CHANNELS BY CONNECTING THEM TOGETHER OR P ARALLELING THEM WITH ANY
OTHER AMPLIFIER OUTPUT . UNDER NO
CIRCUMST ANCES SHOULD THE AMPLIFIER
BE OPERA TED WITH THE COVER REMO VED .
THERE ARE NO USER SER VICEABLE COMPONENTS INSIDE. A V OID POTENTIALLY D ANGEROUS SHOCK HAZARDS, KEEP THE
COVER CLOSED AT ALL TIMES!
AIR INTAKE
T w o DC fans are provided. F an guards are
provided to protect from any large debris stopping the fans or getting inside the amplifier . Fan
air filters may be purc hased from the factory .
NOTE: Air filters must be clean at all times to
assure proper amplifier cooling. A periodic
maintenance schedule is recommended depending on environmental conditions.
4
INSTALLATION & OPERATION
SECTION 4
SPECIFICATIONS
Type:
Six Channel audio amplifier
Po wer Output: Continuous A verage P ower (120
VAC)
200 W atts into 8 Ohms, 1 Channel Driven
300 W atts into 4 Ohms, 1 Channel Driven
450 W atts into 2 Ohms, 1 Channel Driven
150 W atts into 8 Ohms, 6 Channels Driven
250 W atts into 4 Ohms, 6 Channels Driven
300 W atts into 2 Ohms, 6 Channels Driven
Intended Specification For Theater Application:
200 W atts into 8 Ohms, 5 Channels and 400
Watts into 2 Ohms, 1 Channel (Subwoofer)
Gain:
30.5dB
Slew Rate:
Closed-loop, greater than 40V per micro second
Frequenc y Response:
Plus/minus 0.25 dB
20 Hz-20kHz
Distortion:
No more than 0.1 percent THD or IM, 0.01W to
rated output, 20 Hz to 2O kHz (typically 0.01
percent)
Hum and Noise:
101 dB below rated output (unweighted, 20kHz
bandwidth)
Input Sensitivity:
Factory Selectable, .775v, 1.0v , 1.5v, shipped at
1.0v for rated output
Input Impedance:
15 kOhms nominal
Controls and Indicators:
(Front Panel) A C Mains Po wer Switch
Po wer-on LED Indicator , Left, Center , Right, Left
Surround, Right Surround and Subwoofer Signal
Status Indicators (green active / red clip)
(Rear P anel) Ground Lift Switch.
T urn-On Delay:
3 second, solid state activated
Special Feature:
“Soft Clip” speaker protection
Cooling:
T wo fans with rear to front cooling.
Crosstalk:
-80 dB
Damping Factor:
500:1 at 1 kHz
Input Connectors:
One 12 position Phoenix (unbalanced)
Output Connectors:
Six 5-way binding posts; One 9 pin D-type
subminiature port
Mains Input:
2400W 30A/15A 100/240 VAC 50/60Hz
Dimensions:
Slimline 7" height, 19" standard rack mount
width, 14" depth overall (less handles)
Weight:
45 lbs. (20.51 kg)
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TA6300 6 Channel Power Amplifier
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