Beat-Sonic ENA-3S1 Plug-and-Play Amplifier with Subwoofer Output - GR86, BRZ, WRX & More
If you want to add serious sound quality to your GR86, Subaru BRZ, WRX, Forester, or other compatible model without touching the factory wiring, the Beat-Sonic ENA-3S1 is your answer. This micro power amplifier connects directly to your existing 10-pin and 6-pin stereo connectors with zero harness modifications - just plug in, tuck it away, and enjoy dramatically improved sound from your stock headunit and speakers.
The ENA-3S1 is the upgrade path from the ENA-2S1, adding a dedicated RCA subwoofer output that makes adding a subwoofer straightforward - no signal taps, no extra adapters. At 50W x 4ch max output, it also delivers slightly more power than the ENA-2S1. The ultra-compact, precision-engineered design uses high-quality FET operational amplifiers and carefully selected acoustic components to bring out detail in your music - from the lowest bass notes to the highest highs - at a high resolution level. If you don't plan to add a subwoofer, the ENA-2S1 is a great option as well.
*RCA outputs on both models are NOT compatible with Harman Kardon equipped vehicles. Non-HK models without the VAZ-A02K module require the VAZ-A02K add-on (included in "Without Harman Kardon" variant).
Features
Ultra-compact amplifier seamlessly installs to the factory stereo system
RCA subwoofer output for easy subwoofer addition
Significantly improve sound quality with more clarity and powerful output across low, mid, and high ranges
Experience high resolution sound while keeping factory speakers and headunit
Uses carefully selected acoustic components including high quality electrolytic and low impedance capacitors, extra copper thickness of 70u to improve all frequencies from low to high
Compact size allows for flexibility with installation location
High-quality FET operational amplifier used for input sections - details of the music including artist voice and breath tone expressed at a high resolution level
Compatibility
2022-2025 TOYOTA GR86
2013-2021 SUBARU BRZ
2022-2025 SUBARU BRZ
2018-2025 SUBARU FORESTER (without HK sound requires VAZ-A02K)
2021-2025 SUBARU IMPREZA (without HK sound requires VAZ-A02K)
2021-2025 SUBARU LEGACY (without HK sound requires VAZ-A02K)
2020-2025 SUBARU OUTBACK (without HK sound requires VAZ-A02K)
2016-2019 SUBARU OUTBACK
2022-2025 SUBARU WRX (without HK sound requires VAZ-A02K)
2016-2021 SUBARU WRX
2022-2025 SUBARU XV CROSSTREK (without HK sound requires VAZ-A02K)
2016-2019 SUBARU XV CROSSTREK
Specifications
Maximum output 50W x 4ch (4 ohm)
Compatible impedance 4-8 ohm
Input sensitivity 0.5-5V
Frequency characteristics 15-80kHz (+0, -1dB)
Total harmonic distortion 0.01% (1kHz / 4 ohm)
Power supply DC12V (minus ground)
Power supply voltage DC11V ~ 15V
Current consumption 0.2A (when there is no signal)
Fuse used 15A
Audio output AUX level (RCA)
Speaker level (supports high level input)
Dimensions 96 (W) x 40 (D) x 113.5 (H) mm
Weight 420g (main unit only)
Installation
The ENA-3S1 installs the same way as the ENA-2S1. Watch the ENA-2S1 install video below for reference - the process is identical.
FAQ
What is the difference between ENA-2S1 and ENA-3S1?
The ENA-2S1 has 45W x 4ch and an RCA high-level input. The ENA-3S1 has 50W x 4ch and adds an RCA subwoofer output for easy subwoofer addition. Choose the ENA-3S1 if you plan to add a subwoofer.
Do I need to cut or splice any wires?
No - both amplifiers are completely plug-and-play. No modifications to the factory harness are required.
My vehicle has Harman Kardon. Can I use this?
The amplifier works with Harman Kardon models for the speaker outputs. However, the RCA audio outputs on both units are NOT compatible with Harman Kardon equipped vehicles.
What is the VAZ-A02K module?
Some newer Subaru models without Harman Kardon require the VAZ-A02K adapter module to work with this amplifier. It is included in the "Without Harman Kardon" variant automatically.
