Boss 644UA: main picture thumbnail

Boss 644UA

In-Dash CD/MP3 Car Stereo Receiver w/ Front USB, SD Card Reader and Black Matrix Display

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Up to $30 in free installation accessories included with this product. Click for details.

Specials with this product

  • Free Installation Accessories!details
  • Free Ground Shipping to the 48 statesdetails

Why Shop Sonic?

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Customer Testimonial

Thanks to SE, I now have a great sounding system. I bought 2 subwoofers and a Pioneer deck. This was by far the best deal I've ever made wen it comes to car audio. They have by far the best prices for your every car audio need. Very satisfied and I can't wait til i purchase something else from them!

- Vader from Las Vegas, NV

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  • Get 50% Off a 3.5mm Auxiliary Cable with Purchase!
    With the purchase of this receiver, you can save 50% on a universal 3.5mm auxiliary cable. This quality aux cable is 6 feet in length and is perfect for connecting portable music players to your stereo.
    644UA thumbnail
    +
    50% Off
    MN06-Black thumbnail
    =

    $72.98

    (was $75.98)

General Features:

  • In-Dash AM/FM, CD, MP3, USB Receiver with Remote
  • Active Black Matrix Display
  • Red illuminated button lighting
  • Power Output:
    • Peak: 60 watts x 4 channels
    • RMS: 14 watts x 4 channels
  • Theft-deterrent, detachable face plate
  • Wireless remote control included
  • Convenient clock display
  • Authorized Internet Dealer
  • 1-year Manufacturer's Warranty

Playback and Audio Features:

  • Playback of CD, CD-R, CD-RW, MP3 and WMA
  • PLL Synthesized AM/FM tuner with 18FM/6AM presets
  • Switchable USA, Europe, Asia, Japan, and Russia radio regions
  • Electronic Shock Protection (ESP)
  • 2-band parametric equalizer with preset tone curves
  • 1bit Digital Analog Converter (DAC) with 8x Oversampling to enhance your MP3/WMA playback
  • SD Card reader for audio playback

Expandability Options:

  • 1 Set of 5V preamp subwoofer outputs
  • Front Auxiliary Input: 3.5mm headphone jack allows connection to portable media devices such as MP3 players
  • Front USB Input: USB port allows connection to digital devices such as flash drives, portable media players, etc.
Also Found As: 644-UA
In-Dash Receiver Specifications
Receiver Size Single DIN
Faceplate Security Detachable
Motorized Faceplate No
Remote Control Yes
Peak Power Output 60 watts x 4 channels
RMS Power Output 14 watts x 4 channels
Preamp RCA Outputs 1 Pair
Sub Preamp RCA Output Yes
Preamp Voltage 5 volts
Built-In Equalizer 2-band parametric equalizer
Display Type LCD Text Display
Display Color Red
Button Color Red
CD Signal-to-Noise Not specified by manufacturer
CEA-2006 Compliant No
Playback Features
AM/FM Tuner Yes
FM Presets 18
AM Presets 6
CD-R/RW Playback Yes
MP3 Playback Yes
WMA Playback Yes
DVD / Video Playback No
Dual Zone No
Expandability Features
Navigation No
Audio/Video Inputs Front 3.5mm
Audio/Video Outputs No
USB Input Front
iPod Audio Connection No
iPod Video Connection No
Satellite Radio No
HD Radio No
Bluetooth Connectivity No
Steering Wheel Control Compatible No
CD Changer Controls No
Rear View Camera Input No
Memory Card Reader SD Card
Warranty and Return Policy
Return Policy Standard Return Policy
Parts Warranty Duration 1 year
Labor Warranty Duration 1 year
Warranty Provider Manufacturer
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Expandable Storage Accessories
Get more out of your new in-dash car stereo with these storage accessories.
  Product Price Add?
Kingston 8 GB SD Card Kingston 8 GB SD Card
8GB SDHC Memory Card Class 4
$13.99
Installation, Tools & Accessories
Get your car stereo receiver installed by an expert, or do it yourself with install tools and accessories found below.
  Product Price Add?
Monster Cable MPC CLNKIT-SM CN Monster Cable MPC CLNKIT-SM CN
2 Bottles of LCD Screen Clean with Cleaning Cloth
$5.99
Scosche TK12 Car Stereo Installation Kit Scosche TK12 Car Stereo Installation Kit
Includes panel removal tool, wire cutter/stripper, test light, RCA cable runner, screwdriver, and more!
$14.99
18 Butt Connectors, 2 Ring Terminals, and Zip Ties 18 Butt Connectors, 2 Ring Terminals, and Zip Ties
Great for connecting your car stereo wires to the harness.
$5.99
SoundKase DFC1X SoundKase DFC1X
Soft-Sided Nylon Receiver Faceplate Case
$5.99
System Optimization and Tuning
Use these accessories to test and tune the sound your new audio system!
  Product Price Add?
Scosche SPL Meter Scosche SPL Meter
Monitor the noise level of your new car audio system with this SPL meter measuring from 60-135 dB.
$24.99
AutoSound 2000 CD-103 AutoSound 2000 CD-103
Audiophile reference series test disc for evaluation of all audio components.
$12.99
AutoSound 2000 CD-102 AutoSound 2000 CD-102
High frequency test CD specifically designed for the set-up and evaluation of sound system imaging and placement.
$12.99

Product Summary

Manufacturer: Boss
Model number: 644UA
UPC: 791489116015
Weight: 4.00 lbs
Internal SKU: 644ua
Internal product ID: 44088