Alpine BRV-S40 BassRev 4" Coaxial 2-Way Car Speakers

The Alpine BRV-S40 proves size doesn’t define power. This compact 4" coaxial speaker delivers deep, room-filling sound with Alpine’s BassRev™ technology, transforming every note into a richer, fuller listening experience in your car.

Engineered for Powerful Performance

The HEDGE™ Surround (High Excursion Design Gathered Edge) lets the 4" cone move farther and more precisely, producing impactful bass and punchy mids that rival a 6.5" speaker—all without taking up extra space.

Max Out the Sound with OPTIM™ Sync

Pair with the Alpine OPTIM8® DSP/Amplifier for intelligent tuning that enhances bass, balances tone, and reveals hidden details in your music. OPTIM™ Sync gives near-6.5" impact from a 4" driver.

Built for Clarity and Strength

Polypropylene + mica cones provide tight, accurate sound, while the rubber HEDGE™ surround extends bass response. The ferrite woofer motor and polyester cloth-dome tweeter ensure consistent performance and clear highs, all finished with a durable gun-metal coating.

Compact Fit, Big Upgrade

The shallow-profile design fits doors and dash locations where space is tight, making it ideal for upgrading factory systems or custom setups.

Tech Specs

Woofer Size: 4"

Tweeter Size: 1" (Coaxial)

Power Handling: 40W RMS / 120W Peak

Frequency Response (BassRev ON): 67Hz – 20kHz

Sensitivity: 84dB (1W/1m)

Impedance: 4Ω

Mounting Depth: 1-3/4"

Cone Material: Polypropylene + Mica

Surround Material: Rubber HEDGE™

Magnet Material: Ferrite (woofer), Neodymium (tweeter)

Dynamic Sound That Travels With You

From rich vocals to tight bass, the Alpine BRV-S40 delivers bold, precise sound—proving great audio doesn’t require massive speakers, just smart engineering.