Owners Manual
Page 3
... dangerous and may result in fire or electric shock. SPECIFICATIONS 20 MAKE THE CORRECT CONNECTIONS. Alpine cannot be extremely hazardous. BEFORE WIRING, DISCONNECT THE CABLE FROM THE NEGATIVE BATTERY TERMINAL. DO NOT SPLICE INTO ELECTRICAL CABLES. Any function that obstruct or hang up inside and may result in fire. 1-EN ALPINE R-A90S 68-35792Z94-A (EN/FR/ES) Doing so will exceed...
... dangerous and may result in fire or electric shock. SPECIFICATIONS 20 MAKE THE CORRECT CONNECTIONS. Alpine cannot be extremely hazardous. BEFORE WIRING, DISCONNECT THE CABLE FROM THE NEGATIVE BATTERY TERMINAL. DO NOT SPLICE INTO ELECTRICAL CABLES. Any function that obstruct or hang up inside and may result in fire. 1-EN ALPINE R-A90S 68-35792Z94-A (EN/FR/ES) Doing so will exceed...
Owners Manual
Page 4
... ALPINE R-A90S 68-35792Z94-A (EN/FR/ES) ACC • Self-Tap • Mount • Logo P • Hexago The Log INST Due to the product. The serial number plate is in oper be installed and used for a Class B computing device in accordance with the specifications in locations with high incidence of the unit. For European Customers Should you purchased this unit...
... ALPINE R-A90S 68-35792Z94-A (EN/FR/ES) ACC • Self-Tap • Mount • Logo P • Hexago The Log INST Due to the product. The serial number plate is in oper be installed and used for a Class B computing device in accordance with the specifications in locations with high incidence of the unit. For European Customers Should you purchased this unit...
Owners Manual
Page 5
EN INSTALLATION Due to the high power output of the R-A90S FR considerable heat is produced when the amplifier is temporarily affixed to the top cover. 1. For this unit in your authorized Alpine dealer. 1. Screws (× 8) (included) Mounting Bracket (included) Holes (× 4) ATTACHING THE LOGO PLATE The Logo Plate is in operation. Using the amplifier as inside the trunk...
EN INSTALLATION Due to the high power output of the R-A90S FR considerable heat is produced when the amplifier is temporarily affixed to the top cover. 1. For this unit in your authorized Alpine dealer. 1. Screws (× 8) (included) Mounting Bracket (included) Holes (× 4) ATTACHING THE LOGO PLATE The Logo Plate is in operation. Using the amplifier as inside the trunk...
Owners Manual
Page 6
... supplied "Cautions on Power Supply Wires Connection" and "Cautions on Power Supply Wires" (page 19), and then use an already installed screw. To prevent external noise from entering the audio system • Locate the unit and route the leads at least 10 cm (4") away from the vehicle's harness. • Keep the battery power leads as far away from other leads as possible. • Connect the ground lead securely...
... supplied "Cautions on Power Supply Wires Connection" and "Cautions on Power Supply Wires" (page 19), and then use an already installed screw. To prevent external noise from entering the audio system • Locate the unit and route the leads at least 10 cm (4") away from the vehicle's harness. • Keep the battery power leads as far away from other leads as possible. • Connect the ground lead securely...
Owners Manual
Page 7
... ALPINE R-A90S 68-35792Z94-A (EN/FR/ES) In such a case, connect the remote turn -on lead, owing to the "REMOTE SENSING" function of Failure to the supplied "Cautions on Power Supply Wires Connection" and "Cautions on lead to Right. • When connecting the speaker output leads of Speaker Output Terminals Connect the Speaker Output Lead (+) / (-) using the Circuit Breaker) with a Speaker-RCA Conversion cable (sold separately). Terminal ( ). See below for alternative method. Verify this unit...
... ALPINE R-A90S 68-35792Z94-A (EN/FR/ES) In such a case, connect the remote turn -on lead, owing to the "REMOTE SENSING" function of Failure to the supplied "Cautions on Power Supply Wires Connection" and "Cautions on lead to Right. • When connecting the speaker output leads of Speaker Output Terminals Connect the Speaker Output Lead (+) / (-) using the Circuit Breaker) with a Speaker-RCA Conversion cable (sold separately). Terminal ( ). See below for alternative method. Verify this unit...
Owners Manual
Page 8
... Hexagon hole screw attached to the Power Supply Terminal ( ) or Speaker Output Terminals ( ). • For safety reasons, connect the battery leads last. • To prevent disconnection of the leads or dropping of the unit, do not use insulated shrink tubing to be Remote a. Hexagon hole screw Ground Lead Power Supply Terminal Battery Lead Remote Turn-On Lead 6-EN ALPINE R-A90S 68-35792Z94-A (EN/FR/ES...
... Hexagon hole screw attached to the Power Supply Terminal ( ) or Speaker Output Terminals ( ). • For safety reasons, connect the battery leads last. • To prevent disconnection of the leads or dropping of the unit, do not use insulated shrink tubing to be Remote a. Hexagon hole screw Ground Lead Power Supply Terminal Battery Lead Remote Turn-On Lead 6-EN ALPINE R-A90S 68-35792Z94-A (EN/FR/ES...
Owners Manual
Page 9
... CD Mode). The head unit's power antenna lead is objectionable, a SPST (Single Pole, Single Throw) switch, in addition to the 3 A fuse mentioned above conditions exist, the remote ES ads last. CONNECTION CHECK LIST Blue/White Power Antenna Remote Turn-On Lead Please check your R-A90S must be connected to a switched power source (ignition) in the ng to vehicle. b. This switch will remain on lead. Otherwise, the amplifier will then be used...
... CD Mode). The head unit's power antenna lead is objectionable, a SPST (Single Pole, Single Throw) switch, in addition to the 3 A fuse mentioned above conditions exist, the remote ES ads last. CONNECTION CHECK LIST Blue/White Power Antenna Remote Turn-On Lead Please check your R-A90S must be connected to a switched power source (ignition) in the ng to vehicle. b. This switch will remain on lead. Otherwise, the amplifier will then be used...
Owners Manual
Page 10
... Switch, turn off the power and insert a small screwdriver, etc., perpendicularly to the Switch. (Front Side) Cross FREQ Use th freque Cross FREQ Use th freque Input Input Gain Adjustment Control Set the R-A90S input gain to achieve the optimum gain setting. At this case the maximum Bass EQ boost level is no longer distorted to the minimum position. Using a dynamic CD as a source, increase the head unit volume...
... Switch, turn off the power and insert a small screwdriver, etc., perpendicularly to the Switch. (Front Side) Cross FREQ Use th freque Cross FREQ Use th freque Input Input Gain Adjustment Control Set the R-A90S input gain to achieve the optimum gain setting. At this case the maximum Bass EQ boost level is no longer distorted to the minimum position. Using a dynamic CD as a source, increase the head unit volume...
Owners Manual
Page 11
... set to "1/2", the signal NOTES: will keep both inputs, CH-1/2 and CH-3/4 Frequency Adjustment Knob ( ) is for selecting Use this switch to CH-5/6, eliminating the need for Y-adapters. independent. b) Setting this control to adjust the crossover either 2-channel or 4-channel + Crossover Mode Selector Switch Subwoofer input mode. Frequencies lower than the specified frequency set by Crossover Frequency Adjustment Knob ( ), and higher than the frequency specified set to the speakers with...
... set to "1/2", the signal NOTES: will keep both inputs, CH-1/2 and CH-3/4 Frequency Adjustment Knob ( ) is for selecting Use this switch to CH-5/6, eliminating the need for Y-adapters. independent. b) Setting this control to adjust the crossover either 2-channel or 4-channel + Crossover Mode Selector Switch Subwoofer input mode. Frequencies lower than the specified frequency set by Crossover Frequency Adjustment Knob ( ), and higher than the frequency specified set to the speakers with...
Owners Manual
Page 12
Speaker Input Level Switch Switch according to adjust the output level remotely. a) When making a speaker input connection with RCA Extension Cables (sold separately), set to "HI". This is not to replace appropriate gain level setting between 50 Hz to 400 Hz. About Lights up Is off whe Indica Blue Red (blinking Red 10-EN ALPINE R-A90S 68-35792Z94-A (EN/FR/ES) Crossover Frequency Adjustment Knob (LP FILTER) Use this control to adjust the crossover frequency between the...
Speaker Input Level Switch Switch according to adjust the output level remotely. a) When making a speaker input connection with RCA Extension Cables (sold separately), set to "HI". This is not to replace appropriate gain level setting between 50 Hz to 400 Hz. About Lights up Is off whe Indica Blue Red (blinking Red 10-EN ALPINE R-A90S 68-35792Z94-A (EN/FR/ES) Crossover Frequency Adjustment Knob (LP FILTER) Use this control to adjust the crossover frequency between the...
Owners Manual
Page 13
... dealer. The indicator color changes to blue. 11-EN ALPINE R-A90S 68-35792Z94-A (EN/FR/ES) Indication color Blue Red (blinking) Red Status Amplifier circuit is too high. Use the correct power supply voltage. Solution Turn down the volume of the head unit (input signal). The indicator color changes to blue. Power supply voltage is normal. ter About Power Indicator ] range EN 6 kHz FR Power Indicator ES Lights up when power is off. Is...
... dealer. The indicator color changes to blue. 11-EN ALPINE R-A90S 68-35792Z94-A (EN/FR/ES) Indication color Blue Red (blinking) Red Status Amplifier circuit is too high. Use the correct power supply voltage. Solution Turn down the volume of the head unit (input signal). The indicator color changes to blue. Power supply voltage is normal. ter About Power Indicator ] range EN 6 kHz FR Power Indicator ES Lights up when power is off. Is...
Owners Manual
Page 14
...) Subwoofer Dual Voice Coil Subwoofer RCA Extension Cable (sold separately) Speaker-RCA Conversion Cable (sold separately) Y-Adapter (sold separately) Head Unit, etc. If you can connec • For the exceed specific Basic Connection Diagram Power Supply Terminal Fuse RCA Input Jacks Speaker Output Terminals Battery Lead (sold separately) Remote Turn-On Lead (sold separately) Ground Lead (sold separately) Front Speakers (Tweeter) Front Speakers (Midrange) Front Speakers (Woofer) 4 Spea When us Input Ch Selecto (CHANN 12-EN ALPINE R-A90S...
...) Subwoofer Dual Voice Coil Subwoofer RCA Extension Cable (sold separately) Speaker-RCA Conversion Cable (sold separately) Y-Adapter (sold separately) Head Unit, etc. If you can connec • For the exceed specific Basic Connection Diagram Power Supply Terminal Fuse RCA Input Jacks Speaker Output Terminals Battery Lead (sold separately) Remote Turn-On Lead (sold separately) Ground Lead (sold separately) Front Speakers (Tweeter) Front Speakers (Midrange) Front Speakers (Woofer) 4 Spea When us Input Ch Selecto (CHANN 12-EN ALPINE R-A90S...
Owners Manual
Page 15
... Subwoofer System When using the 4 Speaker + Subwoofer System, set each switch as follows. Input Channel Input Channel Crossover Mode Crossover Mode Crossover Mode Selector Switch Selector Switch Selector Switch Selector Switch Selector Switch (CHANNEL-3/4) (CHANNEL-5/6) (CHANNEL-1/2) (CHANNEL-3/4) (CHANNEL-5/6) EN 3/4 5/6 OFF OFF LP FR parately) Speaker Input Level Switch ES [LO] Remote Turn-On Lead Head Unit, etc. Dual Voice Coil Subwoofer System Series connection Parallel connection * If the connected head unit does not have a Speaker Output and RCA Extension Cable...
... Subwoofer System When using the 4 Speaker + Subwoofer System, set each switch as follows. Input Channel Input Channel Crossover Mode Crossover Mode Crossover Mode Selector Switch Selector Switch Selector Switch Selector Switch Selector Switch (CHANNEL-3/4) (CHANNEL-5/6) (CHANNEL-1/2) (CHANNEL-3/4) (CHANNEL-5/6) EN 3/4 5/6 OFF OFF LP FR parately) Speaker Input Level Switch ES [LO] Remote Turn-On Lead Head Unit, etc. Dual Voice Coil Subwoofer System Series connection Parallel connection * If the connected head unit does not have a Speaker Output and RCA Extension Cable...
Owners Manual
Page 16
2 Speaker + Subwoofer System (Bridged Connections) When using the 2 Speaker + Subwoofer System (Bridged Connections), set each switch as follows. Input Channel Selector Switch (CHANNEL-3/4) 1/2 Input Channel Selector Switch (CHANNEL-5/6) 5/6 Crossover Mode Selector Switch (CHANNEL-1/2) OFF Crossover Mode Selector Switch (CHANNEL-3/4) OFF Crossover Mode Selector Switch (CHANNEL-5/6) LP Speaker Input Level Switch Front 3 When us Input Ch Selecto (CHANN [LO] Remote Turn-On Lead Head Unit, etc. 14-EN ALPINE R-A90S 68-35792Z94-A (EN/FR/ES)
2 Speaker + Subwoofer System (Bridged Connections) When using the 2 Speaker + Subwoofer System (Bridged Connections), set each switch as follows. Input Channel Selector Switch (CHANNEL-3/4) 1/2 Input Channel Selector Switch (CHANNEL-5/6) 5/6 Crossover Mode Selector Switch (CHANNEL-1/2) OFF Crossover Mode Selector Switch (CHANNEL-3/4) OFF Crossover Mode Selector Switch (CHANNEL-5/6) LP Speaker Input Level Switch Front 3 When us Input Ch Selecto (CHANN [LO] Remote Turn-On Lead Head Unit, etc. 14-EN ALPINE R-A90S 68-35792Z94-A (EN/FR/ES)
Owners Manual
Page 17
Input Channel Input Channel Crossover Mode Crossover Mode Crossover Mode Selector Switch Selector Switch Selector Switch Selector Switch Selector Switch (CHANNEL-3/4) (CHANNEL-5/6) (CHANNEL-1/2) (CHANNEL-3/4) (CHANNEL-5/6) EN 1/2 1/2 HP-H BP LP FR Speaker Input Level Switch ES [LO] Remote Turn-On Lead Head Unit, etc. 15-EN ALPINE R-A90S 68-35792Z94-A (EN/FR/ES) ode tch 5/6) LP Front 3-Way System When using the Front 3-Way System, set each switch as follows.
Input Channel Input Channel Crossover Mode Crossover Mode Crossover Mode Selector Switch Selector Switch Selector Switch Selector Switch Selector Switch (CHANNEL-3/4) (CHANNEL-5/6) (CHANNEL-1/2) (CHANNEL-3/4) (CHANNEL-5/6) EN 1/2 1/2 HP-H BP LP FR Speaker Input Level Switch ES [LO] Remote Turn-On Lead Head Unit, etc. 15-EN ALPINE R-A90S 68-35792Z94-A (EN/FR/ES) ode tch 5/6) LP Front 3-Way System When using the Front 3-Way System, set each switch as follows.
Owners Manual
Page 18
Front 2-Way + Subwoofer System When using the Front 2-Way + Subwoofer System, set each switch as follows. Input Channel Selector Switch (CHANNEL-3/4) 1/2 Input Channel Selector Switch (CHANNEL-5/6) 5/6 Crossover Mode Selector Switch (CHANNEL-1/2) HP-H Crossover Mode Selector Switch (CHANNEL-3/4) BP Crossover Mode Selector Switch (CHANNEL-5/6) LP Speaker Input Level Switch Front 3 R-A75M When us Input Ch Selecto (CHANN [LO] Remote Turn-On Lead Head Unit, etc. 16-EN ALPINE R-A90S 68-35792Z94-A (EN/FR/ES)
Front 2-Way + Subwoofer System When using the Front 2-Way + Subwoofer System, set each switch as follows. Input Channel Selector Switch (CHANNEL-3/4) 1/2 Input Channel Selector Switch (CHANNEL-5/6) 5/6 Crossover Mode Selector Switch (CHANNEL-1/2) HP-H Crossover Mode Selector Switch (CHANNEL-3/4) BP Crossover Mode Selector Switch (CHANNEL-5/6) LP Speaker Input Level Switch Front 3 R-A75M When us Input Ch Selecto (CHANN [LO] Remote Turn-On Lead Head Unit, etc. 16-EN ALPINE R-A90S 68-35792Z94-A (EN/FR/ES)
Owners Manual
Page 19
... Front 3-Way + Subwoofer / 2 Amplifier System (Connection example with R-A75M) When using the Front 3-Way + Subwoofer / 2 Amplifier System, set each switch as follows. Input Channel Input Channel Crossover Mode Crossover Mode Crossover Mode Selector Switch (CHANNEL-3/4) Selector Switch (CHANNEL-5/6) Selector Switch (CHANNEL-1/2) Selector Switch (CHANNEL-3/4) Selector Switch (CHANNEL-5/6) EN 1/2 1/2 HP-H BP LP FR Speaker Input Level Switch ES R-A75M [LO] Head Unit, etc. Remote Turn-On Lead Speaker Input Level Switch [LO] R-A90S 17-EN ALPINE R-A90S 68-35792Z94...
... Front 3-Way + Subwoofer / 2 Amplifier System (Connection example with R-A75M) When using the Front 3-Way + Subwoofer / 2 Amplifier System, set each switch as follows. Input Channel Input Channel Crossover Mode Crossover Mode Crossover Mode Selector Switch (CHANNEL-3/4) Selector Switch (CHANNEL-5/6) Selector Switch (CHANNEL-1/2) Selector Switch (CHANNEL-3/4) Selector Switch (CHANNEL-5/6) EN 1/2 1/2 HP-H BP LP FR Speaker Input Level Switch ES R-A75M [LO] Head Unit, etc. Remote Turn-On Lead Speaker Input Level Switch [LO] R-A90S 17-EN ALPINE R-A90S 68-35792Z94...
Owners Manual
Page 20
... "REMOTE SENSING" function may not work depending on the head unit side connected to CH5/CH6 • For the "Speaker Input Level System" setting, connecting the Remote Turn-On Lead is used . Front Speaker output (L)/(R) to CH1/CH2, Rear Speaker output (L)/(R) to CH3/CH4, Subwoofer output (L)/ (R) to this product. The Y-adapter is not required if a stereo/mono pair line output is not required due to drive both inputs of this unit. One signal 18-EN ALPINE R-A90S 68...
... "REMOTE SENSING" function may not work depending on the head unit side connected to CH5/CH6 • For the "Speaker Input Level System" setting, connecting the Remote Turn-On Lead is used . Front Speaker output (L)/(R) to CH1/CH2, Rear Speaker output (L)/(R) to CH3/CH4, Subwoofer output (L)/ (R) to this product. The Y-adapter is not required if a stereo/mono pair line output is not required due to drive both inputs of this unit. One signal 18-EN ALPINE R-A90S 68...
Owners Manual
Page 21
... ot work n no pair Cautions on Power Supply Wires Use the specified wire size according to the total fuse capacity of the amplifier to be used . 19-EN ALPINE R-A90S 68-35792Z94-A (EN/FR/ES) Connection example when installing an amplifier alone • When the wire length from the amplifier to the vehicle's battery is 5 m Wire size used for (A): 4 AWG/21 mm2 EN • External Fuse capacity: Make it equal to...
... ot work n no pair Cautions on Power Supply Wires Use the specified wire size according to the total fuse capacity of the amplifier to be used . 19-EN ALPINE R-A90S 68-35792Z94-A (EN/FR/ES) Connection example when installing an amplifier alone • When the wire length from the amplifier to the vehicle's battery is 5 m Wire size used for (A): 4 AWG/21 mm2 EN • External Fuse capacity: Make it equal to...
Tech Spec Sheet
Page 1
... bridged to provide up -front bass impact you 're ready to upgrade your music in the center of the performance. An Amp That Grows with enough mid-bass power to create the up to 500 watts at 4ohms to a subwoofer system such as a pair of staggered output with 5-Channel Power - Utilizing custom Alpine internal components, this powerhouse amp is able to achieve remarkable...
... bridged to provide up -front bass impact you 're ready to upgrade your music in the center of the performance. An Amp That Grows with enough mid-bass power to create the up to 500 watts at 4ohms to a subwoofer system such as a pair of staggered output with 5-Channel Power - Utilizing custom Alpine internal components, this powerhouse amp is able to achieve remarkable...
