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GX-A604/GX-A602/GX-A3001
power amplifier
OWNER’S MANUAL
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introduction ® THANK YOU for purchasing a JBL GX-series amplifier. So we can better serve you should you require warranty service, please retain your original sales receipt and register your amplifier online at www.jbl.com. included items Speaker-level input harness GX-Series Amplifier (x 1) (GX-A602, GX-A3001 x 1) (GX-A604 x 2) locA tion And mountinG Although these instructions explain how to install GX-series amplifiers in a general sense, they do not show specific installation methods th
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INSTALLATION LOCATION Amplifiers need air circulation to stay cool. Select a location that provides enough air for the amp to cool itself. • Suitable locations a re under a seat (provided the amplifier doesn’t interfere with the seat adjustment mechanism), in the trunk, or in any other location that provides enough cooling air. • Do not mount the amplifier with the heatsink facing downward, as this interferes with the
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power And Ground connections IMPORTANT: Disconnect the vehicle’s negative (–) battery terminal before beginning the installation. The GX series amplifiers are capable of delivering high power levels, and require a heavy-duty and reliable connection to the vehicle’s electrical system to achieve optimal performance. Please adhere to the following instructions carefully. usIng the onnectorsc GX-series amplifiers use the same type of screw terminals for power and speaker conne
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GROUND (GND) CONNECTION Power Connectors 2 Connect a wire (minimum 10 AW G – 5.3 mm ) from the amplifier’s GND terminal directly to a solid point on the vehicle’s chassis. • For a good connection, use sandpaper to clear the paint from the metal surface at this chassis location. Use a star-type lock washer to secure the wire’s connection. POWER (12 V) CONNECTION Audio System 2 1. Connect a wire (minimum 10 AW G – 5.3 mm ) Head Unit Remote Turn-On directly
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speAker And input connections A l w a y s c o n n e c t t h e ( + ) s p e a k e r t e r m i n a l o n t h e a m p l i fi e r t o t h e ( + ) t e r m i n a l o n t h e s p e a k e r a n d t h e ( – ) s p e a k e r t e r m i n a l o n t h e a m p l i fi e r t o t h e ( – ) t e r m i n a l on the speaker. IMPORTANT: Make sure the (+) and (–) bare wires do not touch each other or the other terminal at both
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GX-A604 INPUT CONNECTIONS: 4-CHANNEL OPERATION Connect your source unit or processor’ s front and rear left and right outputs to the amplifier’ s inputs as shown in the illustration. Source Unit Front Line Outputs Rear Line Outputs See Set The Crossover Controls, on page 20, for information about setting the amplifier’ s controls for 4-channel operation. To use the speaker-level inputs instead of the line-level inputs, see Using T
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GX-A604 SPEAKER CONNECTIONS: 3-CHANNEL OPERATION Minimum speaker impedance: 2 ohms each (left & right speakers); 4 ohms (subwoofer) • Connect the left and right speakers to the FL and FR (+) and (–) terminals • Connect the subwoofer to the RL (+) and RR (–) terminals. (The rear -channel Bass Boost control makes the rear channels preferable for subwoofer connection. See Set The Bass Boost, on page 23.) NOTE: You can conne
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GX-A604 INPUT CONNECTIONS: 3-CHANNEL OPERATION Connect your source unit or processor’ s line outputs as shown in the illustration below . Set the input mode switch in the "4CH" position NOTE: Use a "Y"-adapter to connect the source unit’ s subwoofer output to the amplifier’ s rear left and right input jacks. "Y"-Adapter Source Unit Front Line Outputs Subwoofer Line Output See Set The Crossover Controls, on page 20,
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gX-a604 speaker connectIons: 2-channel operaI t on Minimum speaker impedance: 4 ohms (each) Connect the left and right speakers as shown in the illustration below . Left Speaker Right Speaker Speaker Fuses 20A 10
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GX-A604 INPUT CONNECTIONS: 2-CHANNEL OPERATION Connect your source unit or processor’ s line outputs as shown in the illustration below . Use only the front left and right input connections and make sure that the Input Mode switch is set in the "2CH" position. Source Unit Front Line Outputs See Set The Crossover Controls, on page 20, for information about setting the amplifier’ s controls for 2-channel
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usIng the speaker-leVel Inputs If your source unit doesn’t have line-level outputs you can use the included speaker-level input harness to connect t h e a m p l i f i e r t o t h e s o u r c e u n i t ’ s s p e a k e r o u t p u t s . F r o m l e f t t o r i g h t , t h e c o n d u c t o r s a r e : L + , L – , R – , R + ( s e e t h e illustration to the right). The speaker-level connectors on all GX-series amp models follow this wiring configuration. F
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GX-A602 INPUT CONNECTIONS: 2-CHANNEL OPERATION Connect your source unit or processor’ s line outputs as shown in the illustration below . L+L–R–R+ Line Outputs Source Unit See Set The Crossover Controls, on page 20, for information about setting the amplifier’ s controls for 2-channel operation. To use the speaker level inputs instead of the line-level inputs, see Using The Speaker-Level Inputs, on page 12. www.jbl.com 13 English
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gX-a602 speaker connectIons: brIdged operatIon Bridged operation provides a single high-power channel for a subwoofer Minimum speaker impedance: 4 ohms Connect the subwoofer to the RL (+) and RR (–) terminals. NOTE: You can connect two 2-ohm subwoofers in series to maintain the required 4-ohm impedance for bridged operation. Fuse 25A +12V Speaker Subwoofer 14
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GX-A602 INPUT CONNECTIONS: BRIDGED OPERATION Connect your source unit or processor’ s subwoofer line output to the amplifier’ s left input, as shown in the illustration below . NOTE: Use a "Y"-adapter to connect the source unit to the amplifier’ s left and right input jacks. L+L–R–R+ Subwoofer "Y"-Adapter Output Source Unit See Set The Crossover Controls, on page 20, for information about setting the amplifier’ s
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gX-a3001 speaker connectIons Minimum speaker impedance; 2 ohms (single subwoofer); 4 ohms (2 subwoofers) The GX-A3001 has two parallel sets of speaker connectors, allowing you to connect two subwoofers. Fuses 20A +12V 4-Ohm Subwoofer 4-Ohm Subwoofer • If you are using a single subwoofer you can connect it to either set of GX-A3001 speaker connectors. • I f y o u a r e u s i n g t w o 2 - o h m s u b w o o f e r s y
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GX-A3001 INPUT CONNECTION Use a "Y"-adapter to connect your source unit or processor’ s subwoofer line output to the amplifier’ s left and right inputs, as shown in the illustration below. If your source unit does not have a dedicated subwoofer output you can connect the rear left/right outputs to the amplifier’s left and right inputs. L+L–R–R+ "Y"-Adapter Subwoofer Output Source Unit See Set The Crossover Controls, on page 20, for information
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controls, input connections And indicA tors GX-A604 Input Rear Rear Front Rear Power Line-Level Protection Mode Speaker-Level Level Crossover Indicator Switch Input Input Control Filter Switch Indicator Connectors Connector Rear Front Rear Bass Front Front Crossover Line-Level Speaker-Level Boost Crossover Level Input Input Control Switch Filter Switch Control Connectors Connector 18
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GX-A602 L+L–R–R+ Line-level Speaker-Level Crossover Bass Boost Protection Input Connectors Filter Switch Input Connector Switch Indicator Power Indicator Level Control GX-A3001 L+L–R–R+ Line-Level Speaker-Level Level Crossover Bass Boost Protection Input Connector Control Control Input Connectors Control Indicator Power Indicator www.jbl.com 19 English
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set the crossover controls gX-a604: 4-channel tIopera on Input Mode switch: Set the Input Mode switch in the "4CH" position. Front Crossover Filter switch: S e t t h e F r o n t C r o s s o v e r F i l t e r s w i t c h i n t h e " O N " ( h i g h - p a s s ) p o s i t i o n . T h i s w i l l l i m i t t h e a m o u n t o f l o w - f r e q u e n c y energy sent to the speakers, significantly reducing distortion and preventing the speakers from d
