Alpine Plug & Play 5-Channel Amplifier & Down-fire Subwoofer Kit | '10 - '24 4Runner

Alpine 5-Channel Amplifier & Down-Fire Subwoofer Kit | 2010–2024 Toyota 4Runner
Big bass. Clean power. Seamless install.

Works with your non-amplified 2010 - 2024 factory radio or aftermarket radio! 

Take your 4Runner’s audio system to the next level with our Alpine 5-Channel Amplifier & Down-Fire Subwoofer Kit, designed specifically for 2010–2024 Toyota 4Runners. Whether you choose the (optional) 10-inch or 12-inch Alpine down-fire subwoofer, this kit delivers deep, punchy bass and clean, balanced sound across all frequencies—transforming your factory system into an experience worth hearing.

Alpine Subwoofer Dimensions:

• Alpine 10" Shallow Subwoofer (SS-SB10): 18.5" (w) x 4.5" (h) x 12.5" (d)
• Alpine 12" Shallow Subwoofer (SS-SB12): 22.5" (w) x 5.25" (h) x 13.125" (d) 

Designed for a Seamless Upgrade
This kit is only compatible with non-amplified 4Runner models (not compatible with JBL). Each component is carefully selected to ensure a plug-and-play installation—no splicing, no guesswork.

What’s Included:

• Alpine S2-A55V 5-Channel Amplifier – Power your entire system with precision and clarity.
• Choice of 10" or 12" Alpine Down-Fire Subwoofer – Deep bass with a low-profile design that tucks neatly away.
• AudX 4Runner Amplifier Mounting Bracket – Custom-fit bracket for a clean, factory-like installation.
• AudX T-Harness – Plug-and-play integration for a no-cut install.
• AudX Plug & Play Main Harness – Simplifies your install for faster setup.
• RCA Adapters – Ensures proper signal flow for your amplifier.
• Trail Grid Pro Amplifier Install Kit – All wiring and hardware needed for a secure connection.
• 10 Zip Ties – For a clean, professional cable management.
• 10mm Ground Bolt – Ensures a solid, reliable ground connection.

Why Choose This Kit?

• Engineered for 4Runners: Every component is tailored for perfect fitment.
• All-in-One Solution: No extra parts or tools needed—everything is in the box.
• Plug-and-Play Simplicity: Get upgraded sound without the hassle of custom wiring.

Alpine S2-A55V — 5-Channel Amplifier

Key Features:

• Hi-Res Audio Certified (up to 40 kHz on four channels)
• Compact Class D design with efficient power delivery
• Five channels: four full-range + one dedicated subwoofer channel
• Adjustable crossovers and variable bass boost
• Compatible with optional remote bass controls (RUX-KNOB.2 / RUX-H01)
• Side-mounted controls and dual-sided terminals for easier installs
• Works seamlessly with factory or aftermarket audio systems

Specs:

• Dimensions: 11.9″ W × 2.25″ H × 8.25″ D
• Weight: ~7 lbs
• Operating Voltage: 14.4 V
• Total Harmonic Distortion: <0.1%
• RMS Power Output:
  • 40W × 4 + 200W × 1 @ 4 Ω
  • 60W × 4 + 300W × 1 @ 2 Ω
• Bridged Output: 120W × 2 @ 4 Ω
• Signal-to-Noise Ratio: >83 dB
• Frequency Response: 20 Hz – 40 kHz (main channels)
• Damping Factor: >100
• Inputs: RCA and speaker-level inputs
• Fuses: Dual 30A

Alpine SS-SB10 10" Down-Fire Subwoofer

Key Features:

• Preloaded 10” S-Shallow Subwoofer  
• Optimal Sealed Cabinet Quality
• Neodymium Magnet  
• Front-Mounted Neodymium Motor  
• Alpine Gen2 DD Linear Magnetic Circuit
• Rugged Polymer Enclosure Cabinet
• Adjustable, Foam-padded Mounting Brackets for Flexible Installation & Reduced Vibration 

Specs:

• Dimensions: 18.5” (W) x 4.5” (H) x 12.5” (D)
• Power Handling: 300W RMS
• Frequency Response: 35Hz-200Hz
• X-Max: 11mm 1-Way Linear
• Nominal Impedance: 2Ω
• Copper Voice Coil: 2” (50.0mm)  
• Single 2 Ohm Voice Coil for a 2 Ohm load (compatible with S2-A55V, KTA-200M, or KTA-30MW Amplifiers) 

Alpine SS-SB12 12" Down-Fire Subwoofer

Key Features:

• Optimal Sealed Cabinet Quality
• Preloaded 12” S-Shallow Subwoofer  
• Neodymium Magnet  
• Front-Mounted Neodymium Motor  
• Alpine Gen2 DD Linear Magnetic Circuit
• Rugged Polymer Enclosure Cabinet
• Adjustable, Foam-padded Mounting Brackets for Flexible Installation & Reduced Vibration

Specs:

• Dimensions: 22.25” (W) x 5.25” (H) x 13.125” (D)
• Power Handling: 300W RMS
• Frequency Response: 30Hz-200Hz
• X-Max:11mm 1-Way Linear
• Nominal Impedance: 2Ω
• Copper Voice Coil: 2” (50.0mm)  
• Single 2 Ohm Voice Coil for a 2 Ohm load (compatible with S2-A55V, KTA-200M, or KTA-30MW Amplifiers) 

Upgrade your 4Runner’s sound system today and hear your music the way it was meant to be heard.