The Beat-Sonic Encore Sigma (ENS-L201) is a plug-and-play premium sound upgrade kit engineered specifically for the 2024+ Lexus GX 550 and 2022+ Lexus NX without Mark Levinson — and it is the only plug-and-play solution available for these vehicles. No cutting, no harness modifications, no speaker replacements. Just dramatically better sound from a single unit that connects directly to your factory amplifier.

Professional local installation available in La Mirada, Southern California. Contact us at info@beatsonicusa.com to book.

Why your factory premium sound system isn't performing at its best — and how the Encore Sigma fixes it

Even factory premium sound systems are built to a cost. The amplification stage inside your Lexus GX 550 or NX factory audio system leaves significant performance on the table — resulting in a sound that feels flat, lacking depth, and unable to fully reproduce the detail in the music you love. Vocals lose their immediacy, bass lacks definition, and the soundstage feels compressed. The Encore Sigma solves this by optimizing and strengthening the audio signal delivered to your factory amplifier — giving it a cleaner, more powerful signal to work with, and allowing your premium factory speakers to perform closer to their true potential.

Your factory head unit, steering wheel controls, and all original Lexus features stay completely intact. You simply get the rich, immersive sound your system was always capable of — finally unlocked.

Key features

The only plug-and-play sound upgrade available — no other plug-and-play solution exists for the GX 550 and NX non-Mark Levinson systems
50W x 8-channel Class AB output — powers all factory speakers simultaneously for a full, balanced soundstage
Plug-and-play installation — connects directly to your factory amplifier, no special tools, no harness modifications, no cutting
Deeper bass, clearer midrange, more articulate highs — without replacing a single speaker
Engineered for factory premium sound systems — tuned to retain the original system's characteristics while elevating performance
RCA audio output — L/R RCA outputs for additional system expansion if desired
Retains all factory Lexus features — head unit, steering wheel controls, navigation, and all OEM functionality remain fully intact
Made in Japan

Specifications

Maximum output: 50W x 8ch (4Ω)
Amplifier class: Class AB
Compatible impedance: 4–8Ω
Remote output: max 0.3A
Frequency response: 20–80kHz
Power supply voltage: DC11V–15V
Current consumption: 0.4A (no signal)
Fuse: 15A
Audio output: RCA L/R
Dimensions: 106mm (W) x 214mm (D) x 40mm (H)
Weight: 850g

Compatible vehicles

The ENS-L201 is compatible with the following Lexus models — without Mark Levinson only:

2024+ Lexus GX 550 without Mark Levinson — installed at the factory amplifier underneath the driver's seat
2022+ Lexus NX without Mark Levinson — installed at the factory amplifier underneath the center console

Important: This kit is NOT compatible with Lexus models equipped with the Mark Levinson premium audio system. If your GX 550 or NX has Mark Levinson, this kit will not work. Mark Levinson is typically listed as a premium audio upgrade on your window sticker or Monroney label. Not sure which audio system your Lexus has? Email info@beatsonicusa.com with your year, model, and trim before purchasing.

Installation

No special tools required. No modifications to the factory wiring harness. The Encore Sigma connects directly to your factory amplifier — under the driver's seat on the GX 550, and under the center console on the NX. Most owners complete the install in approximately one hour using our step-by-step YouTube video guides. Professional installation is available in Southern California through Beat-Sonic directly, or through our authorized installer network worldwide. Email info@beatsonicusa.com with your location or zip code to find the nearest shop.

Frequently asked questions

Will I need to replace my factory speakers or head unit?
No. The Encore Sigma works entirely with your existing factory speakers and head unit. You keep everything in place — the kit simply optimizes and strengthens the audio signal to unlock performance your factory system was always capable of.

Is this compatible with Mark Levinson equipped models?
No. The ENS-L201 is only compatible with Lexus GX 550 and NX models without Mark Levinson. If your vehicle has Mark Levinson, this kit is not compatible. Mark Levinson is typically listed as a premium audio upgrade on your window sticker. Email info@beatsonicusa.com if you are unsure before purchasing.

Where exactly does this install in my vehicle?
On the GX 550, the Encore Sigma installs at the factory amplifier located underneath the driver's seat. On the NX, it installs at the factory amplifier located underneath the center console. Both installations are plug-and-play with no harness modifications required.

Why is this priced higher than other Beat-Sonic amplifier kits?
The Encore Sigma is an 8-channel Class AB amplifier — it simultaneously powers all factory speakers in your vehicle rather than just 4 channels. It is also the only plug-and-play solution available for the GX 550 and NX non-Mark Levinson systems, and is engineered specifically for these vehicles' factory premium audio architecture.

Will my steering wheel controls and all factory Lexus features still work?
Yes. All factory features including steering wheel controls, navigation, CarPlay (if equipped), and your factory head unit continue to work normally.

How long does installation take?
Most installs take approximately a few hours following our YouTube video guide. The most time-consuming part is accessing the factory amplifier — under the driver's seat on the GX 550, under the center console on the NX. The technical connection itself is straightforward plug-and-play.

Does this ship to Canada or internationally?
Yes. We ship to Canada and Mexico.

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Encore Sigma Premium Plug & Play Sound Upgrade Kit for Lexus GX 550 & NX – Beat-Sonic ENS-L201

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