SMART SMART TA6300 TA6300 User manual

Copyright 1997 by SMART Devices, Inc.
5945 Peachtree Corners East
Norcross, GA 30071-1337
TABLE OFCONTENTS
SECTION1 INTRODUCTION ..................................................... 2
SECTION2 INSTALLATION ..................................................... 2
SECTION3 FEATURES ..................................................... 3
SECTION4 SPECIFICATIONS ..................................................... 5
SMARTproducts aredesigned todeliver unsurpassedquality inworkmanship andperformance.
Thefollowing informationgives detailedinstructions onthe installationand operationof the
SMARTTA6300Power Amplifier. Westrongly encouragenew ownersof the TA6300to thor-
oughlyread thisentire manualbefore placingtheir newSMART productsinto service. Thiswill
ensurethat theTA6300will be operatedproperly togive the superiorperformance thatit was
designedto deliver.
Forservice orinstallation assistance,please callour TechnicalSupport Departmentbetween the
hoursof 8a.m.-5p.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 attribut-
able 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 SIX CHANNEL POWER AMPLIFIER
INSTALLATION & OPERATION MANUAL

TA6300 6 Channel Power Amplifier
2
SECTION 1
Introduction
The SMART modelTA6300 is a professional six-
channelamplifier featuringDC protection, quick
interconnectwith SMART companionproducts,
softclip speaker protectionand massiveheatsink
extrusionswith internalD.C.fan assistto make
sureyour amplifier stays cool evenwhen the
music is hot. TA6300 delivers 200 watts per
channel into 8 ohms on five channels simulta-
neous with 400 watts into 4 ohms on the sixth
(subwoofer)channel.
Circuit Description
Toassure absolutelong-term reliability, the
output section of each channel incorporates
multipleMotorola PowerTransistors,which
providethree timesthe amplifiers ratedpower in
watts of dissipation per channel. The output
stageis arranged ina fully complementary
formatfor classAB/2operation. The bias current
isevenly distributed amongall outputdevices.
Biasthermal compensation isaccomplished by
thermallymating abipolar semiconductor
junctionto the heat-producingoutput device.
Triple diffused highpower drivertransistorsare
employed along with high speed, high voltage
siliconannular devices forthe pre-driver and
inverterstages. Utilization ofthese components
provide the required separation of FT break
pointsfor absolutestability. Fully complemen-
tarydrive and loadingis utilized throughout.
Only 20dB of negative feedback is used to
reduceforward transferdistortion tominimum
levels. VItype energylimiters are incorporated
forshort circuitprotectionof theamplifier. Due
tothe unusually large safe operating areaof
outputstage, the limitersdo notactuate until
drivinga forty-five degreereactive load of under
2ohms at full power.
Construction
The amplifiers aredesigned on anall-modular
conceptpermitting rigorouspre-assembly mod-
uletesting andmaximum service accessibility.
Eachfunctional module isfully tested before
finalassembly. Although components of the
highestquality are usedthroughout, each ampli-
fieris burned in,prior toshipment, at theworst
caseoperating point toeliminate anypossibility
ofcomponent malfunction. All chassiscompo-
nentsare precision machinedfrom high quality
aluminum and 16-gauge sheet steel stock. The
entirepackage concept isdirected toward
maximumefficiency ofspace and structure,
accountingfor the compact size and light
weight.
SECTION 2
Installation
AllSMART amplifiers aredesigned for mounting
in a standard 19-inch equipment rack, or many
of the 19-inch rack type portable cases avail-
able. TheTA6300 require 7 inches of vertical
panel space, with 15" inches required behind
the panel. Total depth including the handles is
16-3/8" inches. Front panels are machined from
solidaluminum stock, witha blackpowdercoat
finishand sturdy rackmount handles.
Placementof theamplifier isnot criticalfor
normaloperation, providedsufficientairflow is
allowed to reach the heatsink array. If the unit is
to be placed on a shelf, or a similar unenclosed
area,allow four inches of clearance behindthe
fanair intake topermit airflowthrough the array.
Ifthe amplifier isto be mounted inan equipment
rackor cabinet withheat producing equipment,
besure that environmentaloperating tempera-
tures do not exceed 55 degrees C (131F).
Should overheating occur because of inad-
equateventilation, thetemperature protection
circuitrywillautomaticallyprotect theamplifier.
Whena safe operatingtemperature isrestored,
theamplifier willreturnto normaloperation.

INSTALLATION & OPERATION
3
Becausethe amplifiers arecapable of delivering
highpower froma relativelysmallphysical
package, considerable heat can develop in
cabinetscontaining severalcomponents. A
good rule of thumb to adopt is to provide forced
air cooling in any enclosure containing four or
moreelectronic components.
SECTION 3
Features
Power Connections
The SMARTTA6300 power amplifiers are
specifiedfor operationfrom 120/240Volt
50/60 Hz mains supply.
Equipmentfor domestic(USA) consumption
includes a captive cord with a three pin
polarizedplug. DO NOT REMOVETHE CEN-
TERGROUNDINGPIN!
Innew installations andportable soundsystems,
orany situation in whichthe mains power is
suspect,it iswise to confirmappropriate voltage
andline polarity BEFOREconnecting the instru-
mentto power sources.
Thermal Protection
Certainconditions ofoperation (restrictedair-
flowcooling, sustained highpower operation
intolow impedance loads) can resultin a rise in
outputdevice casetemperature sufficient to
affecttheamplifier’sperformance.
Should the heatsink reach 95 C, the output will
automaticallybe disconnected fromthe load
(loudspeaker)and will remaindisconnected
until the temperature drops below 95 C. The
action of removing the load has the effect of
eliminatingoutput current. This,inturn, results
inan immediate andrapid drop in temperature.
The load willautomatically be reconnected
when the temperature drops below 95 C.
FanAssist Cooling
The SMARTTA6300 is equipped with a convec-
tioncooling systemutilizing massiveheatsink
extrusionsand twofans.
Soft Clip Speaker Protection
The SMARTTA6300 incorporates Soft Clip
Speakercircuitry. Thiscircuitryprevents the
amplifierfrom being driveninto a hardclip state,
which prevents speaker damage caused by the
amplifierbeing over drivenor into DCstate.
Selectable Input Sensitivity
The SMARTTA6300 is equipped with selectable
inputsensitivity. Thefactory setting is 1v for
rated output, .775v and 1.5v are also available.
If you would like to change the setting set by the
factoryyou may contactthe factory forinstruc-
tions.
Front and Rear Panel Controls
POWER SWITCH/CIRCUIT BREAKER
Toturn theAmplifier ON orOFF, pressthe right
orleft portion ofthis switchrocker. Thisswitch
also serves to break power in the event of a
surge.
POWER INDICATING LED
This LED whenilluminatedindicates that the
amplifierison.
SIGNAL STATUS INDICATORS
Sixgreen LED indicatorsare normallyoff with
nosignal present andilluminate when signalis
present.
CLIP INDICATORS
Sixred LED indicatorsilluminate whenthe input
signal levels exceed 3 dB above clipping. Ad-

TA6300 6 Channel Power Amplifier
4
justthe sourcelevel control tominimize clip-
ping.
12 POSITION PHOENIX INPUT CONNEC-
TION
The six unbalanced inputs are connected via 12
position phoenix connector. The pinouts are
labeled on the rear of theTA6300.
GROUND LIFT SWITCH
TheGROUND/LIFTis providedtoeliminate
groundloops between thisamplifier and a
preamplifierthat canoccur incertain installa-
tions.
OUTPUT CONNECTIONS
Outputconnections are viafive-way binding
posts,identified as topolarity withred and black
terminals. We suggest the use of dual banana
plugs as a convenient and reliable method of
hook-up. They allow rapid removal for polarity
reversals. This featureis often necessaryin the
checkout and adjustmentof multi-element
biamplifiedand triamplifiedsoundsystems.
Heavy Class 11 wire may be used by unscrew-
ingthe large plasticportion ofthe output termi-
naland inserting thewire into the holeprovided.
Note:It isextremely importantwhen making
wire connections that no wire stand or end
touchesan adjacent terminal!
A 9 pin D-type subminiature connector is pro-
vided for quick connection to SMART’s MN600
Cinema STEREOCHECK booth monitor through
astandard 9 pin D-type maleto female cable.
AIR INTAKE
Two DC fans are provided. Fan guards are
providedto protect fromany large debris stop-
pingthe fans orgetting inside theamplifier. Fan
airfilters may bepurchasedfrom thefactory.
NOTE:Airfilters mustbe cleanat alltimes to
assureproper amplifier cooling. Aperiodic
maintenanceschedule is recommended de-
pendingon environmental conditions.
AC POWER CORD
TheTA6300 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 anAC outlet that will deliver the
propervoltage and currentfor amplifier opera-
tion.
CAUTION:
TheTA6300 amplifier is a product of the most
advanced technology and manufacturing tech-
niquesand is fullyprotected against overheat-
ing,input overload andshorted or mismatched
loads. Asis the casewith anyprecision instru-
ment, some care should be taken in the unit’s
operation. The following precautions should be
noted and adhered to. Damage resulting from
theiromission is notcovered under the termsof
thewarranty.
DO NOT PARALLELTHE OUTPUTS OFANY
CHANNELSBY CONNECTINGTHEMTO-
GETHEROR PARALLELINGTHEMWITHANY
OTHERAMPLIFIEROUTPUT. UNDERNO
CIRCUMSTANCES SHOULDTHEAMPLIFIER
BE OPERATEDWITHTHE COVER REMOVED.
THEREARE NO USER SERVICEABLE COMPO-
NENTSINSIDE. AVOID POTENTIALLYDAN-
GEROUS SHOCK HAZARDS, KEEPTHE
COVER CLOSEDATALLTIMES!

INSTALLATION & OPERATION
5
SECTION 4
SPECIFICATIONS
Type:
SixChannel audio amplifier
Power Output: ContinuousAverage Power (120
VAC)
200Watts into 8 Ohms, 1 Channel Driven
300Watts into 4 Ohms, 1 Channel Driven
450Watts into 2 Ohms, 1 Channel Driven
150Watts into 8 Ohms, 6 Channels Driven
250Watts into 4 Ohms, 6 Channels Driven
300Watts into 2 Ohms, 6 Channels Driven
IntendedSpecification ForTheaterApplication:
200Watts into 8 Ohms, 5 Channels and 400
Wattsinto 2Ohms, 1 Channel (Subwoofer)
Gain:
30.5dB
Controlsand Indicators:
(FrontPanel)ACMains PowerSwitch
Power-on LED Indicator, Left,Center,Right, Left
Surround, Right Surround and Subwoofer Signal
StatusIndicators (greenactive / redclip)
(RearPanel)Ground LiftSwitch.
Turn-OnDelay:
3second, solid stateactivated
SpecialFeature:
“SoftClip” speaker protection
Cooling:
Two fanswith rear tofront cooling.
Crosstalk:
-80 dB
DampingFactor:
500:1 at 1 kHz
SlewRate:
Closed-loop, greater than 40V per micro second
Frequency Response:
Plus/minus0.25 dB
20Hz-20kHz
Distortion:
No more than 0.1 percentTHD or IM, 0.01W to
ratedoutput, 20 Hz to 2OkHz (typically 0.01
percent)
Humand Noise:
101 dB below rated output (unweighted, 20kHz
bandwidth)
InputSensitivity:
Factory Selectable, .775v, 1.0v, 1.5v, shipped at
1.0vfor rated output
InputImpedance:
15kOhms nominal
InputConnectors:
One 12 position Phoenix (unbalanced)
OutputConnectors:
Six 5-way binding posts; One 9 pin D-type
subminiatureport
MainsInput:
2400W 30A/15A 100/240VAC 50/60Hz
Dimensions:
Slimline7" height, 19"standard rack mount
width,14" depthoverall (less handles)
Weight:
45 lbs. (20.51 kg)

TA6300 6 Channel Power Amplifier
6