Bedienungsanleitung Velodyne SC-12 (Seite 16 von 30) (Englisch)

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10 - SC-1250 Amplier User’s Manual

You should set the crossover frequency to obtain a smooth and seamless transition from the subwoofer(s) to

the main speakers in your system. If your main speakers are smaller units with limited low frequency output,

youmaywishtochooseahigherfrequency(suchas100-120Hz)thanyouwouldwithlargerspeakerswhich

have greater low frequency output. With larger speakers, you might start with this control set lower, such as 80

Hz.TheSC-1250crossoverhasadefaultof80Hz.

Mostreceivers and processorsprovidean option tocharacterizemain speakers as“large”or“small.” This

aectsthecrossoverpoint.Werecommendinmostcasessettingthemainspeakersto“small,”despitetheir

sizeandfrequencyresponsecharacteristics.Thisisbecausethepowerful1250wattSC-1250combinedwith

the SC subwoofer(s) you have acquired are more than likely more suited to low bass reproduction than your

ampandmainspeakercombination.Withtheburdenoflowfrequencyreproductionrelieved,youramplierand

mainspeakercombinationwillenjoybetterperformanceandabout50%moreavailableheadroom,enabling

them to more accurately reproduce the rest of the frequency spectrum.

Disabling the Low-Pass Crossover (Subwoofer Direct)

Ifyourreceiver/processorprovidesacrossovertothesubwoofer(s),youmaywanttobypasstheSC-1250’s

low-passcrossover.Todothis,depressBOTHtheCrossoverUPandCrossoverDOWNbuttonssimultaneously.

The numeric LED will show indicating that the low-pass crossover has been defeated. To reactivate the low-

pass crossover, simply push the crossover UP or crossover DOWN buttons.

A Word About Your Receiver’s Crossover and the SC-1250 Crossover

YourVelodyneSC-1250amplierisdesignedtooperateusingthefullrangeaudiosignalforinputwhenusingthe

built-incrossover.Manyhometheaterprocessors/receivers(DolbyDigital

, DTS

,THX™)havea“subwoofer

out”jackthatperformsthissamefunctionandaredesignedtobeusedwithapoweredsubwoofer.

In these installations, you may want to bypass the crossover in either the processor or the Velodyne SC-1250

asdescribedabove.However,insomecasesyoumaywanttouseBOTHcrossovers.Ifyouchoosetodothis

youshouldstaggerthefrequencies,(i.e.,120Hzsubwoofer,80Hzprocessor)forbestresults.

Note: If not using an external crossover, you should use the built-in crossover for optimal performance. When

usingasingleRCAsuboutfromtheprocessor,itdoesnotmatterwhichlinelevelinput(L/R)isused.

A Word About Interconnect Cables

When installing your Velodyne SC-1250 using the line-level connections, you should always use high quality

shielded interconnect cables. It is recommended that you keep the length of cable as short as possible to avoid

any potential external interference problems.

WhenconnectingtheSC-1250toyoursubwoofer(s),useaqualityspeakercablethatisatleast14-gauge.Be

very careful to avoid any loose or frayed strands that could result in a short, causing a dangerous condition and

possibledamagetoyourunit.Cablesofextremelylargesizearetypicallynotrequired.Extremelylargegauge

wiremaynotproperlytinthebindingposts,resultinginapoorconnectionandpossibleshortcircuits.

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