Beat-Sonic ENA-3S1 Plug and Play Amplifier Kit (50x4w) – 2013–2026 Subaru BRZ / 2022–2026 Toyota GR86

If your factory audio feels flat, thin, or lacks punch, the Beat-Sonic ENA-3S1 Micro Power Amplifier Kit is the cleanest way to bring it to life without ripping apart your interior. This ultra-compact, plug-and-play amplifier integrates directly with the factory stereo system to improve clarity, detail, and overall output across low, mid, and high ranges—while keeping your factory headunit and speakers.

The ENA-3 series also adds a major win for audio upgrades: an RCA subwoofer output that makes adding a sub simple and clean when you’re ready for more low-end.

Note: ENA-3 Series will function exactly the same as the 2 Series in terms of installation and gain adjustments on the rear. Instead of a 45x4w it is a 50x4w and the 3-Series will have RCA outputs and a remote out wire to add powered subwoofers without splicing into any factory wires. No need for a line out converter

Key Features

• True Plug-and-Play Install: No special tools required and no modifications to the factory harness.
• Ultra-Compact Amp: Small footprint makes mounting flexible and easy.
• Improved Sound Quality: More clarity and stronger, more controlled output through lows, mids, and highs.
• High-Resolution Detail: High-quality input stage helps bring out vocals and fine musical detail.
• RCA Subwoofer Output: Easy sub integration via dedicated RCA SUBWOOFER OUT.
• Quality Components: Carefully selected acoustic components, including high-quality electrolytic and low-impedance capacitors and increased copper thickness (70μ) for improved frequency performance.

Why We Like It

This kit is for the owner who wants the car to stay OEM-clean but sound noticeably better. It’s the kind of upgrade you hear immediately—more volume headroom, better separation, and less “strained” sound—without committing to a full aftermarket system. And when you want more bass, the sub out is already there.

Important Notes

• Harman Kardon Models: Harman Kardon-equipped vehicles will lose volume control on an aftermarket subwoofer connected via the ENA-3S1 RCA outputs. A separate bass volume control knob is required.
• Factory Subwoofer: The factory-installed subwoofer (if equipped) is not affected.

Specifications

• Maximum Output: 50W x 4ch (4Ω)
• Compatible Impedance: 4–8Ω
• Input Sensitivity: 0.5–5V
• Frequency Response: 15–80kHz (+0, -1dB)
• Total Harmonic Distortion: 0.01% (1kHz / 4Ω)
• Power Supply: DC12V (minus ground)
• Operating Voltage: DC11V–15V
• Current Consumption: 0.2A (no signal)
• Fuse: 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 Notes

• Designed as a plug-and-play upgrade that integrates into the factory stereo system with no harness modification.
• Mounting location can vary depending on preference due to the compact size.
• If adding an aftermarket subwoofer, confirm your system requirements (especially for Harman Kardon models).

What’s in the Box

• Beat-Sonic ENA-3S1 Micro Power Amplifier (main unit)
• Plug-and-play harness/installation components (per Beat-Sonic kit contents)

Compatibility & Disclaimers

Fitment confirmed for the vehicles listed above. Audio results can vary based on factory speaker condition, trim level, and whether the vehicle is equipped with Harman Kardon audio. For aftermarket subwoofer integration on Harman Kardon systems, a separate bass volume control solution may be required.