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12-1977.fm Page 1 Tuesday, July 13, 1999 10:07 AM
Cat. No. 12-1977
OWNER’S MANUAL
Please read before using this equipment.
85 × 4 High Power 4-Channel
Trunk Mount Amplifier
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12-1977.fm Page 2 Tuesday, July 13, 1999 10:07 AM FEATURES Your Optimus 85 × 4 High Power 4- Input Level Controls - let you adjust Channel Trunk Mount Amplifier is de- the level of the audio signals that en- signed to produce a total of 340 watts ter the amplifier. to give added punch and power to your vehicle’s existing stereo sys- Automatic Power Switching - auto- tem. matically turns on/off the amplifier when you turn on/off your autosound The amplifier produces up to 85 system. watts per
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12-1977.fm Page 3 Tuesday, July 13, 1999 10:07 AM Mute Turn On Circuit - eliminates Important: Be sure your speakers the irritating thump noise that some can handle 340 watts of power (170 amplifiers produce when you turn watts per channel if you connect the them on. autosound system to one pair of speakers, or 85 watts per channel if Power Indicator - lights when power you connect the autosound system is on. to two pairs of speakers). Each speaker must have an impedance of Full MOSFET Power
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12-1977.fm Page 4 Tuesday, July 13, 1999 10:07 AM CONTENTS Preparation ..................................................................................................... 5 Choosing a Mounting Location .................................................................. 5 Before You Begin the Installation .............................................................. 5 Connecting Ground and Primary/Switched Power .................................... 6 Connecting to Your Autosound System .....
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12-1977.fm Page 5 Tuesday, July 13, 1999 10:07 AM PREPARATION CHOOSING A MOUNTING LOCATION The ideal location for mounting the amplifier is in your vehicle’s trunk. Wherever you decide to mount it, choose a mounting location that: • Does not interfere with the vehicle’s operation. • Lets you drill mounting holes without damaging other vehicle components. • Allows enough space around the cooling fins for proper airflow and cooling. Warning: The amplifier gets very hot while it is on. Do not t
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12-1977.fm Page 6 Tuesday, July 13, 1999 10:07 AM Cautions: • To prevent damage to your amplifier or autosound system, you must first connect the ground, primary, and switched power wires (as described in “Connecting Ground and Primary/Switched Power”) before you connect the speakers to the amplifier. Make the connections only in the order shown. Damage to the amplifier is possible if you connect any wire incorrectly. • Turn on the power to test the connections before you permanently mount t
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12-1977.fm Page 7 Tuesday, July 13, 1999 10:07 AM 2. Securely connect the supplied dark blue/white wire’s spade connector end to the amplifier’s REM (remote power) (illus - please add a terminal. dwg that illustrates step 3) 3. Connect the dark blue/white wire’s other end to your autosound system’s switched power lead using a twist-on terminal connector (such as Cat. No. 64-3057, not supplied). Note: If your autosound system does not have a remote power output lead, connect this wire to a p
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12-1977.fm Page 8 Tuesday, July 13, 1999 10:07 AM CONNECTING TO YOUR AUTOSOUND SYSTEM Low Level Input Connections You can connect your autosound system’s low-level phono output jacks to the amplifier’s low-level phono input jacks. For the best results, use shielded audio cables, such as Cat. No. 42-2368 (not supplied). Note: For a cleaner, less noisy signal transfer between your autosound system and the amplifier, the amplifier’s low input phono jacks are gold-plated. 1. Temporarily place th
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12-1977.fm Page 9 Tuesday, July 13, 1999 10:07 AM If your autosound system has four phono outputs but you are using only two speakers (front or rear), connect only the autosound system’s correspond- ing output jacks to the amplifier using audio cables as follows: • front-left to CH1 and front-right to CH2, or • rear-left to CH3 and rear-right to CH4 9
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12-1977.fm Page 10 Tuesday, July 13, 1999 10:07 AM If your autosound system has only two phono output jacks (left and right) and you are using four speakers, use two Y-adapter audio cables to make the connections as follows: Note: For the best results, use shielded phono plug-to-phono plug Y- adapter audio cables, such as Cat. No. 42-2368 (not supplied). • Connect one of the Y-adapter’s double phono plug ends to the amplifier’s CH1 phono jack. • Connect the other double phono plug end to the
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12-1977.fm Page 11 Tuesday, July 13, 1999 10:07 AM If your autosound system has only two phono output jacks (left and right) and you are using only two speakers, simply connect them to the amplifier’s corresponding CH1 and CH2, or CH3 and CH4, phono jacks. High-Level Input Connections If your autosoiund system has only speaker outputs, you can connect them to the amplifier’s HIGH INPUT CH4 CH3 and HIGH INPUT CH2 CH1 sockets using the floating ground connection or the common ground connection
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12-1977.fm Page 12 Tuesday, July 13, 1999 10:07 AM If your autosound system has four speaker outputs and you are going to use four speakers: Floating Ground Connection Common Ground Connection 12
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12-1977.fm Page 13 Tuesday, July 13, 1999 10:07 AM If your autosound system has only two speaker outputs and you are going to use four speakers: Floating Ground Connection Common Ground Connection 13
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12-1977.fm Page 14 Tuesday, July 13, 1999 10:07 AM CONNECTING THE SPEAKERS With the speakers placed in their approximate locations, run one speaker wire from each speaker to the amplifier. We recommend you use 16- or 18-gauge marked or color-coded wires to help you correctly connect the speakers to your amplifier. For the maximum bass response and the best overall performance, keep your speakers properly phased (connect + to + and - to -). Caution: Do not connect the speakers’ negative (-) te
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12-1977.fm Page 15 Tuesday, July 13, 1999 10:07 AM Connecting Four Speakers 1. Connect one end of a speaker wire’s marked conductor to the amplifier’s CH1 + terminal (front-left positive). 2. Connect the unmarked conductor’s end to the amplifier’s CH1 - terminal (front-left negative). 3. Repeat Steps 1 and 2 to connect another speaker wire to the amplifier’s CH2 (front-right) terminals. 4. Repeat Steps 1-3 to connect speaker wires to the amplifier’s CH3 (rear-left) and CH4 (rear-right) termi
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12-1977.fm Page 16 Tuesday, July 13, 1999 10:07 AM Connecting Two Speakers (Unbridged Connection) If you are connecting only two speakers, you can connect them to the amplifier’s front (CH1 and CH2) or rear (CH3 and CH4) speaker terminals. Caution: This is an unbridged connection that produces 85 watts per channel. If you do not have high power speakers, use this connection. 1. Connect one end of a speaker wire’s marked conductor to the amplifier’s + CH1 (front-left positive) or + CH3 (rear-
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12-1977.fm Page 17 Tuesday, July 13, 1999 10:07 AM Connecting Two Speakers (Bridged Connection) If you are connecting only two speakers (left and right), you can add (bridge) the power output of two channels (front and back) to produce the combined power of both from each of the two speakers. Caution: This is a bridged connection that produces 170 watts per speaker. Use this connection only if you have high quality speakers capable of handling a pow- er output of 170 Watts. 1. Connect one end
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12-1977.fm Page 18 Tuesday, July 13, 1999 10:07 AM Connecting Two Unbridged Speakers and One Unbridged Subwoofer 1. Connect the two speakers to the CH1 and CH2 terminals (front speakers) or to the CH3 and CH4 terminals (rear speakers). 2. For an unbridged connection, connect the subwoofer to the amplifier’s CH3 or CH4 terminals (if you used the front speaker connections in Step 1) or the CH1 or CH2 terminals (if you used the rear speaker connections in Step 1). 3. Push in X-OVER FREQ so you
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12-1977.fm Page 19 Tuesday, July 13, 1999 10:07 AM Connecting Two Unbridged Speakers and One Bridged Subwoofer 1. Connect the two speakers to the CH1 and CH2 terminals (front speakers) or to the CH3 and CH4 terminals (rear speakers). 2. For a bridged connection, connect the subwoofer to the amplifier’s CH3 + and CH4 terminals (if you used the front speaker connections in Step 1) + or the CH1 and CH2 terminals (if you used the rear speaker connec- + + tions in Step 1). 3. Push in X-OVER F
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12-1977.fm Page 20 Tuesday, July 13, 1999 10:07 AM TESTING THE CONNECTIONS Before you permanently mount the amplifier, connect your vehicle battery’s neg- ative (-) cable, turn your vehicle’s ignition to ON or ACC, then test the connec- tions. The amplifier is properly connected to the autosound system and speakers if you can verify that the amplifier and the autosound system turn on properly and the speakers’ sound is clear and unmuffled. If you cannot quickly verify that all components oper
