DaytonAudio SA240 User manual

User Manual
daytonaudio.com
240 Watt Subwoofer Plate
Amplifier
Model: SA240/SA240-B

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Thank you for purchasing the SA240 Subwoofer Amplifier. It has been designed and built to provide years of high
quality sound reproduction, and is ideal for use in both home stereo and home theatre systems. The amplifier has
been engineered to include features like a choice of high or low level audio connections, selectable crossover frequen-
cy, auto on/off circuit activated by input signal, and comprehensive internal production against shorted speaker loads,
thermal faults, and overload conditions. NOTE: The SA240-B model contains bass boost (6dB @ 30Hz) all other
features are the same.
FEATURES:
• Line-levelandspeaker-levelinputsforconnectionto
 anysystem
• Auto-oncircuitcomesontheinstanttheampisneeded
• Soft-clipcircuitryprovidescleanoutputevenwithdemanding
programmaterial
• Fullcomplementofprotectioncircuitsforextremereliability
• Reversiblephaseswitchforbestintegrationwithsatellites
• Variablefrequency4thorderlow-passcrossoverfora
 cleantransitiontomainspeakers
• Advancedsoftclipcircuitryimprovesheadroomand
 protectswoofers
• Switchable115/230Vinputvoltage

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INPUT/OUTPUT CONNECTIONS
1.) Low-Level Inputs (Left/Right)
RCAstylejacksthatwillacceptstandardlinelevelinputsfrom
apre-amplevelsource.Theywillacceptastereosignaland
internallycombineitintomono.Bothleftandrightinputjacks
mustbeconnectedtothesourceinordertodrivetheamplier
tofulloutput.Note: Theuseofa“Y”cordissuggestedifa
monosourceoranLFEoutputfromahometheatresurround
soundreceiverisused.
2.) Low-Level Outputs (Left/Right)
Thisoutputallowsthelowlevelinputsignaltobedaisychained
tootherampliers.Thelowlevelinputissimplypassedthrough
withnoalteration(EQ)totheoriginalsignal.
3.) High-Level Inputs
Speakerlevelinputsusingbindingposttypejackstopermit
connectionwithbananatypeplugsorspadeterminals.Allows
theusertoconnectthespeakerleveloutputofafullrange
ampliertotheinputofthesubwooferampusingstandard
speakerwire.Amonosignalisderivedfromthestereo,which
thenfeedsthesubwooferampliercrossoverinput.
4.) High-Level Outputs
Speakerleveloutputsusingbindingposttypejackstopermit
connectionwithbananatypeplugsorbarewire.Usedtocon-
nectfromthesubwooferamptopasssignalfromthefullrange
ampontothemainL/Rspeakers.Signalisonlypresenton
thisoutputifthehighlevelinputisalsoused.Thesignalto
theL/Rspeakerswillbeshapedbyaninternal6dB/octave
125Hzhighpasslter.
5.) Power input
ThisunitfeaturesanIECgroundedtypepowerjack.Thisallows
theusertochangethepowercorddependingonthecountry
and voltage used.The IEC jack also houses an integrated
fuseholderthatcontainstheAClinefuse.Theunitissetat
thefactoryfor115Voperation.Itissuppliedwitha5A,250V
fuseandUSAtypepowercord.Inmost230Vapplicationsa
separate power cord and 2.5A, 250V fuse will be required
andarenotincluded.
CONTROLS/INDICATORS
6.) Gain
Thiscontrolwillmatchtheamplier’sinputsensitivitytothe
outputofthepre-ampsource.Ifthesourceoutputhasavari-
ablecontrol,werecommendthattheuserspendamomentor
twodeterminingthebestbalancebetweenthetwocontrols.
When a balance is found between low noise, linear level
control,andsufcientleveltodrivetheamptotherequired
output,thegainknobcanbeconsideredtobethe“volume
control”forthesubwoofersystem.
7.) Frequency
Thiscontrolisusedtoestablishthehighestfrequencythat
thesubwooferwillreproduceandhasarangebetween40to
180Hzwithaslopeof24dBperoctave.Ifyouareusingthe
systemformusicandyourmainspeakershavegoodbass
capability,youcouldsetthecontroltoafairlylowvalueat40,
60,oreven100Hz.Ifthemainspeakersaresmallerordo
nothavemuchbassoutput,setthecontrolhigher.Experiment
withtheamountof“overlap”thatyouwillexperiencewhenall
speakersareplayinginthesamerange.Thiscanbehelpful
whenintegratingthesubwooferwiththerestofthesystemand
withtheroom.Note: Whenusingtheampwitha LFE(Low
FrequencyEffects)outputonapre-amporhometheatrere-
ceivertheinternallowpassltercircuitryshouldbebypassed
byturningthefrequencycontrol tomaximum(180Hz).The
hometheaterreceivershouldbeusedtocontrolthelowpass
crossoverfrequency.
8.) Power LED
Whenthepowerswitchismovedtothe“on”position,theLED
willilluminategreen,andtheampwillbein“On”mode.When
setinthe“Auto”positiontheunitwillbeinthestandbymode.In
thisposition,ifalowlevelsignalofabout10millivoltsorgreater
isappliedtotheinput,thelightwillchangegreentoindicate
thattheamplierisfullyoperationalandreceivingtypicalmusic
program.Ifaninputsignalisnotdetectedfor10to15minutes,
theampwillgobackto“standby”modeandtheLEDwillturn
off.Iftheprotectioncircuitdetectsa shortcircuitorthermal
overloadtheunitwillshutdownandtheLEDwillturnred.
9.) Power Switch
On,OffandAutomode.Whenthe“Auto”positionisselected,
theampisin“standby”modeuntilaninputsignalofabout
10millivoltsorgreaterisdetected.Theampwillgobackto
standbymode10-15minutesaftertheinputsignalstops.
10.) Phase
Thistwo-position(NOR=0°phaseandREV=180°phase)
switchhelpstocompensatefordifferencesintheacoustical
andelectricalcharacteristicsbetweenthesubwooferandthe
mainsystemspeakers.Therelativelocationsofspeakersin
the system can cause signicant disturbances in speaker
interactionduetotimedelayissues,orthedestructivephase
interferencesthatcanoccuratcertainfrequencies.Theuse
ofthisswitchinconjunctionwithalteringthelocationofthe
subwoofercanhaveadramaticeffectonsystemintegration.
The“NOR”settingwouldbeconsideredthenormalordefault
setting,butbesuretoexperimentduringsystemset-up.
11.) Voltage Selector Switch
Thisswitchallowstheusertoselect115Vor230Voperation.
Theunitissetatthefactoryfor115Voperationandcontains
a5A,250Vfuse.Whenoperatingat230Vbesuretochange
thefusetoa2.5A,250Vfuse.
12.) Output Lead for Subwoofer Driver:
Thisrearmountedoutputleadconnectstheampliertothe
subwoofer driver.The output lead is roughly 20" long and
iscolor coded.Thered wire uses aninsulated.250" quick
disconnectandtheblackwireusesaninsulated.205"quick
disconnect.Theseconnectorscanbeeasilyremovedifyour
driverrequiresanothersizeortypeofconnector.Besureto
observeproperpolaritywhenconnectingtheampliertoyour
subwooferdriver(red=positive,black=negative).

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SA-10 ©2010DaytonAudio®
Warranty Information
DaytonAudio®productsareconstructedbyindustryexperts,andarethoroughlytestedbeforeshipment.DaytonAudio®productsarewarrantedfor
theperiodofoneyear.Thiswarrantyislimitedtomanufacturerdefects,eitherinmaterialsorworkmanship.DaytonAudio®isnotresponsibleforany
consequentialoninconsequentialdamagetoanyotherunitorcomponentorthecostforinstallationorextractionofanycomponentoftheaudiosystem.
Intherarecaseofaproductfailure,pleasecontactyourplaceofpurchaseorcallourCustomerSupportDepartmentat(937)743-8248.
Warranty Limitations
Therearenootherwarranties,eitherexpressorimplied,whichextendtheforegoing,andtherearenowarrantiesofmerchantabilityortnessforany
particularpurpose.Thewarrantywillnotcoverincidentalorconsequentialdamageduetodefectiveorimproperuseofproducts.Thisincludesbutis
notlimitedtoburntvoicecoils,overheating,bentframes,holesinthecone,orbrokenleadwires.
Thiswarrantygivesyouspeciclegalrightsandyoumayalsohaveotherrightswhichvaryfromstatetostate.
Non-Warranty Service:Ifnon-warrantyserviceisrequired,theproductmaybesenttotheCompanyforrepair/replacement,transportationprepaid,
bycalling(937)743-8248fordetails,completeinstructions,andservicefeecharges.
SPECIFICATIONS:
Rated Power Output: 150wattsRMSinto8ohms@0.1%THD
 240wattsRMSinto4ohms@<1.0%THD
*Based on one-third power duty cycle
Signal to Noise Ratio: 90dBA-weighted
Efficiency: 66%
Input Impedance: 12Kohms
Bass Boost: SA240,none
 SA240-B,6dB@30Hz
Low Pass Adjustment: 40Hz–180Hz
Phase Adjustment: 0°(NOR)or180°(REV)
Dimensions: 9-13/16"Wx9-13/16"Hx5D
Enclosure Cutout: 8-1/2"x8-1/2"
Power Requirements: 115/230VAC,50Hz/60Hz,400W
Weight: 12lbs.
NOTES ABOUT HUM:
WhiletheSA240hasbeendesignedtominimizethepossibilityofhuminthesubwoofersystem,itisstillpossiblethatahum
willoccurinrarecircumstances.Itssafetygroundingcancreateapathforsmallamountsof60Hzenergytotraveltrough
theline-levelaudiosystem.Whilenotdangerous,thisenergycancausedifcultywiththesubwooferautosignalsensing
circuit,andattheveryleastwillinterferewiththequietenjoymentofyoursystem.Therstcourseofactionshouldbetryingto
makesurethatalloftheaudiocomponentsareconnectedtoeitherthesameelectricaloutlet,oratleastintothesamecircuit
branch.Next,cableTVsystemsarenotoriouslytheculprit,sobesuretotrydisconnectingallcoaxialfeedsthatareconnected
tothesystem.Ifthissolvestheproblem,installacoaxiallineisolatorandreconnectthesystem.Intheveryworstcase,aline-
levelaudioisolator/transformerconnectedtotheline-inofthesubwooferamplierwillusuallysolvetheproblem.
Important Safety Instructions
Read these instructions – All the safety and operating instructions should be read before this product is operated.
Keep these instructions – The safety and operating instructions should be retained for future reference.
Toreducetheriskofelectricshock,donotremovecover.Nouserserviceablepartsinside.TheunitshouldbeconnectedtoanearthgroundedACelectri-
calsocket.Donotdefeatthesafetypurposeofthepolarizedorgroundingplug.Iftheprovidedplugdoesnottintoyouroutlet,consultanelectricianfor
replacementoftheobsoleteoutlet.Referservicingtoqualiedpersonnel.Toreducetheriskofreandshockdonotexposeunittorainormoisture.Clean
onlywithdrycloth.Unplugtheunitduringlightningstormsorwhenunusedforlongperiodsoftime.
Theunitshouldbeoperatedinawellventilatedarea.Minimumclearanceis2inchesfromtheventilationopenings.Donotinstallnearanyheatsourcessuch
asradiators,heatregisters,stoves,orotherapparatus(includingampliers)thatproduceheat.Protectthepowercordfrombeingwalkedonorpinched,par-
ticularlyattheplugs,conveniencereceptacles,andatthepointwheretheyexittheunit.Onlyuseattachments/accessoriesspeciedbythemanufacturer.
Note:Unitissetatthefactoryfor115Voperation.Besuretochangethefusetoa2.5Aratingbeforeswitchingto230Voperation.