BOSS Audio Systems Single-DIN Bluetooth Car Stereo with

The BOSS Audio Systems 638BCK is a single-DIN car stereo bundle with Bluetooth, USB, AM/FM radio and a pair of 6.5" two-way full-range speakers for straightforward in-vehicle audio upgrades.

Upgrade a vehicle’s sound system without replacing the dash: this kit combines a compact single-DIN receiver that offers hands-free calling, wireless music streaming and multiple wired inputs, with two full-range 6.5" speakers designed to reproduce a wide frequency range. The package focuses on practical connectivity—Bluetooth, USB, and auxiliary—plus pre-amp outputs should you later add amplification. It’s intended as an affordable, plug-and-play improvement for daily driving and media playback.

How will Bluetooth and hands-free calling improve my driving experience?

The receiver’s built-in Bluetooth connects to phones for wireless audio streaming and hands-free calls via the integrated microphone. That keeps your phone stowed while maintaining clear call audio through the car speakers, improving safety and convenience.

• Stream music from apps like Spotify and Pandora without cables.
• Answer and make calls using steering wheel controls (if compatible).
• Built-in microphone captures voice for hands-free conversations.
• Bluetooth pairing stores multiple device profiles for quick reconnection.

What media sources and file types does the 638BCK support?

This stereo accepts Bluetooth audio, a front USB port, and an auxiliary input, plus AM/FM radio tuning for live broadcasts. The USB input supports common digital formats so you can play MP3 and WMA files from a flash drive or compatible device.

• USB port for flash drives and digital audio playback (MP3, WMA).
• Auxiliary input for wired connections to phones or MP3 players.
• AM/FM tuner for stations, news and sports updates while driving.
• Bluetooth audio streaming for phone-based music libraries.

Are the included 6.5" speakers powerful enough for everyday listening?

The two-way full-range 6.5" speakers deliver a usable frequency span from roughly 80 Hz to 18 kHz and a combined peak power rating suitable for stock or slightly upgraded systems. For louder volumes or heavier bass, adding a dedicated amplifier is recommended to ensure consistent power and reduce distortion.

• 6.5" woofer with full-range cone for balanced mid and high frequencies.
• Rated 250 watts per pair peak power; sensitivity near 84 dB for typical car environments.
• Compact 2.6" mounting depth fits many factory speaker locations.
• Pairing with an external amp improves dynamics and headroom.

What outputs and installation options does the receiver offer?

The single-DIN head unit includes front and rear pre-amp outputs so you can expand the system with external amplifiers or add subwoofers later. Its compact chassis suits smaller dash openings, and professional installation is advised to ensure wiring and speaker matching are correct for safe operation.

• Front and rear pre-amp outputs for amplifier integration.
• Single-DIN form factor fits standard dash cavities (4.5" x 7" x 2").
• USB and AUX accessible at the unit’s front for convenience.
• Manufacturer offers a 3-year platinum online dealer warranty via Amazon purchases.

Who this package is for: drivers seeking an economical, no-frills audio upgrade that modernizes connectivity—Bluetooth streaming, hands-free calling and USB playback—without changing the vehicle’s dashboard size. It’s a good fit for users replacing a worn factory radio, outfitting a commuter vehicle, or building a basic system with the option to add external amplification later. If you want heavy bass or concert-level volume, plan to pair these speakers with an amplifier and subwoofer.