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Manafacture: Aperion Audio File size: 1.3 mb File name: 592607cf-2cd5-416e-92c1-8ffb89bbf6a8.pdf Language of manual:

Ensure the power cord is not stretched, pinched or otherwise abused. Ensure the power cord is routed to avoid foot traffic. Your SP-18 amplifier should be cleaned only with a dry cloth. GETTING TO KNOW YOUR SP-18 ACTIVE 18” SUBWOOFER PANEL CONTROLS 1) Level Control: Sets the volume of the subwoofer 2) Phase Switch: Sets the polarity of the SP-18. 3) Power Indicator: The Power indicator lights when the SP-18 amplifier has been turned on and has power. 4) Protection: Red LED turns on when distortion is audible in the amplifier output. This indicates that you should turn the amplifier down. 5) Right & Left Inputs: These inputs are summed and sent to amplifier’s Low Pass filter (120 Hz and below). 6) Right & Left Full-Range Outputs: Send stereo full-range signal allowing daisy chaining of additional subwoofers. You do not need to y-cable out of your mixer or audio device to get an additional full- range signal. 7) Right & Left High-Pass Outputs: Send stereo high-pass signal (120 Hz and above) directly to active, full-range speakers or through a rack mount amplifier to passive speakers. 8) External Speaker On/Off Switch: Turns Speakon NL-4 connector (and external subwoofer) on and off. When only using the SP-18, turn this switch off. When an external, non-powered subwoofer (SP-18S) is connected, turn this switch on. NEVER turn switch on or off while amplifier is turned all the way up. 9) External Speaker Output: The Speakon NL-4 connector connects the amplifier to an external, non-powered subwoofer (SP-18S). Either pins 1+ and 2+ can be used as the positive connection. Either pins 1or 2- can be used as the Negative Connection. External subwoofer must be 8 Ohms 10) ON/OFF Switch: Turns the SP-18 amplifier on or off. The SP-18 will only turn on when the amplifier detects an audio signal. 11) Fuse Holder: Houses a fast-resetting 12 amp fuse. 12) Power Cord Connector: For attachment of the included power cord. SP-18 DIGITAL AMPLIFIER SP-18 DIGITAL AMPLIFIER Connecting Your SP-18 To Active Full-Range Speakers (In addition to the SP-18S - Passive 18” subwoofer) Connecting Your SP-18 To Passive Full-Range Speakers (As well as the SP-18S - Passive 18” subwoofer) Daisy-chaining Your SP-18 To Additional SP-18 Subwoofers (As well as the SP-18S - Passive 18” subwoofers) WARRANTY INFORMATION Thank you for choosing this B-52 Pro-Audio sound product. B-52 manufactures some of the world’s best sounding and most reliable professional speaker systems and components. E.T.I. Sound Systems, Inc., manufacturers of B-52, takes great pride in thoroughly testing each B-52 product prior to shipment. Please read the warranty terms and conditions below and carefully read the provided Limited Warranty Card for additional terms and conditions. LOUDSPEAKER & MID-RANGE COMPONENTS: E.T.I. Sound Systems, Inc. warrants the original purchaser that the B-52 subwoofer will be free from defects in material and workmanship for a period of (5) FIVE YEARS from the original purchase date. A da...

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