JBL SCS 178 Owner's Manual

Also see for SCS 178 Center: Service manual

Contents

6Dolby Pro Logic (Non-Digital) – Line Level (SCS 178 and SCS 188)Use this installation method forDolby Pro Logic appli-cations(not Dolby Digital, DTS ® orother digital processing), wherethe receiver/processor isequipped with a subwooferoutput, or a volume-controlledpreamp (line-) level output:Use RCA-type patch cordsto connect the line-levelsubwoofer outputs on yourreceiver or amplifier to the line-level inputs on the subwoofer.IMPORTANT: Do not use theLFE input on the subwooferwith Dolby Pro Logicprocessors. Note: If yourreceiver or amplifier only hasone subwoofer output jack,then you will need to use a Y-connector (not included). Plugthe male end of the Y-connector into your receiver oramplifier’s subwoofer outputjack, and connect each of thetwo female ends to separateRCA-type patch cords. Finally,plug the RCA-type patch cordsinto the line-level inputs on thesubwoofer.Connect each speaker to thecorresponding speakerterminals on your receiver oramplifier.Dolby Digital or DTS® (or Other Digital Surround Mode) Connection(SCS 178 and SCS 188)+ –+ –+ –+ –+ –+ –+ –+ –+ –ReceiverSubwooferOutLeftFrontLeftSurround+ –RightFrontRightSurroundSubwooferR LCenterSurround BackLine-Level InRight SurroundRight FrontLeft SurroundLeft Front CenterRL+ –Surround Back+ –Only in 6.1 systemsUse this installation method forDolby Digital, DTS ® or otherdigital surround processors:Use the line-level input jackmarked “LFE” for the Low-Frequency Effects channel.Connect this jack to the LFEoutput or subwoofer outputon your receiver or amplifier.Connect each speaker to thecorresponding speakerterminals on your receiver oramplifier.Make sure that you haveconfigured your surround-sound processor for“Subwoofer On.” The surroundreceiver should be configuredfor 6.1-channel operation(if available) and the front left,front right, center and rearspeakers should all be set to“Small.”If your receiver allows you toset the crossover frequencybetween the subwoofer and themain speakers, select either120Hz or 150Hz, or select thesetting that is the closestfrequency below these.LINE LEVEL INLFE INPUTLFE OUT LRSUBWOOFERRECEIVER