Alpine BRV-S40C BassRev™ 4" component speaker system subwoofer 8" dimensions: 15/16"W x 15/16"H x

dimensions: 15/16"W x 15/16"H x 1"D

and FLAC music files (see Details tab for full capabilities)

Coaxial Speaker System: 4-inch (100 mm) Woofer

Built-in Supercapacitor

System Efficiency 91 dB @ 1 W / 1 m System Nominal Impedance 4 Ω System Frequency Response 59 Hz - 22 KHz ± 3 dB

Alpine BRV-S40C BassRev™ 4" component speaker system subwoofer 8" dimensions: 15/16"W x 15/16"H xHigh res audio certified The Alpine BRV S4C 4" component speakers are an excellent way to add life to your sound. In fact, they're Hi Res Audio Certified by the Japan Audio Society (JAS). These component speakers include a pair of mid bass woofers and a pair of 3 4" tweeters that Alpine has designed and tested to maximize the Optim DSP output from select Alpine amplifiers. The 4" mid bass driver has a HEDGE (High Excursion Design Gathered Edge)