STI/WRX | System 450Q
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PRE-ORDER PRICE: Shipping January 1

OEM Audio Plus is proud to bring our signature sound reproduction and seamless integration to the '15+ Subaru WRX / STI. Our Guarantee: Unmatched clarity, deep bass reproduction, proven reliability and a complete transformation of your listening experience in a minimalist package fashioned specifically for your STI / WRX both in design and acoustics.  




  • NEW Multi-Channel 32-Bit DSP Power Amplifier 
  • O+ Signature Sound Reproduction
  • Vehicle-Specific 8" Four-Coil Subwoofer System
  • Quick-Sync Wiring Harness
  • Front 1" Soft Dome Tweeter

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  • 360 Watts RMS (Continuous / @ 2-ohms) 
  • Advanced Cirrus-Logic 32-Bit Digital Signal Processing
  • Real-time system diagnosis for trouble-free operation 
  • Meets all OEM standards including AEC-Q100

Subaru WRX, Hatchback, sound system, audio upgrade, subwoofer system, subaru sub,

Mounts using exiting hardware location under passengers seat 

O+ SIGNATURE TUNINGUnmatched Sound Reproduction - Liken to a finely tuned home theatre or studio headphones - Guaranteed 

  • Tuned specifically for the in-vehicle acoustics of Your WRX / STI and output characteristics of the head unit (Factory or Aftermarket)
  • Digital Signal Processing (DSP): clean, clear and crisp sound is achieved w/o requiring a massive power amplifier. 
  • Amplifier converts analog signals into digital signals by way of four analog- to-digital (A/D) converters 
  • DSP maintains signal integrity and provides precision adjustment not possible with an analog signal 

2015 WRX, 2015 STI - Amplifier, Subaru sound upgrade, sound system, bass, audio, subwoofer, dsp amplifier, stereo

WRX/STI-SPECIFIC SUBWOOFER SYSTEMDeep, non-localized low frequency reproduction that is felt as well as heard without compromising Your music's clarity. 

  • 8" Four-Coil Woofer 
  • Genuine Carbon Fiber Cone Woofer 
  • Frequency Response: 20 -1000 Hz 
  • Mounts using existing vehicle mounting locations
  • 14 Liter Sealed Enclosure (The Ideal Air Volume)

2015 WRX, 2015 STI - Amplifier, Subaru sound upgrade, sound system, bass, audio, subwoofer, dsp amplifier, stereo



  • Installs seamlessly on the Passenger side of vehicle
  • includes dedicated Subwoofer Amplifier (300 Watts RMS)
  • Doubles the moving mass of your O+ sound solution bass response for more immersive bass respsonse
  • Provides Subwoofer Output Gain Control Knob for controlling both Subwoofer Output

FACTORY SPEAKER OPTIMIZATIONYou've truly got to hear it to believe what we did with the stock Subaru speakers. 

2015 WRX, 2015 STI - Amplifier, Subaru sound upgrade, sound system, bass, audio, subwoofer, dsp amplifier, stereo


  • Silk soft dome
  • 4-ohms 
  • 50W RMS (100 Peak)
  • Sensitivity 91.8 dB (1 W,1M)
  • Frequency Response: 3,000-20,000 Hz
  • Built-in 6db/Oct. High Pass Filter
  • Neodymium Magnet Structure




  • Connects seamlessly to factory harness and radio + Maintains all functionality 
  • Constructed of genuine OEM connectors
  • Perfect connection and maintain 100% signal integrity every time.
  • Fuse Holder Assembly is element proof butt-connectors w/ built-in solder
  • Weighs under 4lbs / 1.8kg 

We invite you to enjoy the Revolution of audio. If you have ANY questions or requests egarding the System 400Q don't hesistate to send us a message or give us a call directly ☎ 855-636-6346

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Subaru WRX STI PayPal

  • Item #: SUB-VA-SYS45Q-1500

STI/WRX | System 450Q

Price: $1,299.00
Sale Price: $1,199.00
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