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Boss 640Ui

CD/MP3/WMA Receiver with Front Panel USB Input and SD/MMC Card Reader

4.7

(3 reviews)

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The product on this page is discontinued.

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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

General Features:

  • In-dash AM/FM CD, MP3, WMA player with Remote
  • Motorized, slide-down/detachable face
  • Dot-Matrix display
  • Wireless remote control included
  • Dual Color Illumination
  • Power Output:
    • Peak: 80 watts x 4 channels
    • RMS: 20 watts x 4 channels
  • CD Text Display
  • MP3 ID3 Tag Display (Title/Artist/Album)
  • 1-year Manufacturer's warranty

Playback and Audio Features:

  • Playback of audio CDs, CD-R, CD-RW, MP3 and WMA
  • PLL-Synthesized tuner with 18FM/12AM presets
  • Preset EQ response curves
  • Encoding function from CD, FM radio, auxiliary line in, iPod

Expandability Options:

  • 2 sets of 5V preamp outputs (front and rear)
  • RDS (Radio Data System)
  • iPod Ready: Boss iPC40 iPod cable required and sold separately
    • The Apple iPhone 3G, iPod Nano 4th Gen, iPod Touch 2nd Gen, and any other newly released iPods can be controlled using the iPod adapter above; however, charging will not be possible unless you purchase the Scosche IFWA PassPORT charging adapter.
  • A/V Rear Input
  • Front Panel USB Port

Key Features:

  • 8x Oversampling
  • Separate bass and treble
  • Quartz digital clock
  • Subwoofer output (BassMax)
  • Stereo/mono & local/distance switches
  • 1-bit D/A converter
  • Switchable USA/Europe/Asia Radio Frequencies
  • SD/MMC Card Slot
  • iXBass, balance, and fader controls
Product History:
Boss 640Ui thumbnail
(newest, current model)
Boss 634UA thumbnail
(previous model, replaced by Boss 640Ui)
** CLOSEOUT!! ** Boss 634U thumbnail
(previous model, replaced by Boss 634UA)
In-Dash Receiver Specifications
Receiver SizeSingle DIN
Faceplate SecurityDetachable
Motorized FaceplateYes
Remote ControlYes
Peak Power Output80 watts x 4 channels
RMS Power Output18 watts x 4 channels
Preamp RCA Outputs3 Pairs (Front, Rear, and Mono-Subwoofer)
Sub Preamp RCA OutputYes
Preamp Voltage5 volts
Built-In EqualizerBuilt-in Presets
Display TypeDot-Matrix Text Display
Display ColorMultiple Colors
Button ColorBlue/Black
CD Signal-to-Noise70 dB
CEA-2006 CompliantNo
Playback Features
AM/FM TunerYes
FM Presets18
AM Presets12
CD-R/RW PlaybackYes
MP3 PlaybackYes
WMA PlaybackYes
DVD / Video PlaybackNo
DVD Region NumberN/A
Expandability Features
NavigationNo
Audio/Video Inputs1 Set of Rear Audio RCA Inputs
Audio/Video OutputsN/A
USB InputFront
iPod Audio ConnectionOptional (Accessory Required and Sold Separately)
iPod Video ConnectionN/A
Satellite RadioNo
HD RadioNo
Bluetooth ConnectivityNo
Steering Wheel Control CompatibleN/A
CD Changer ControlsNo
Rear View Camera InputN/A
Memory Card ReaderMMC
SD Card
Warranty and Return Policy
Return Policy Standard Return Policy
Parts Warranty Duration1 year
Labor Warranty Duration1 year
Warranty ProviderManufacturer
Customer Review Summary for Boss 640Ui
Average Customer Rating is 4.7 out of 5 stars:
4.7
based on 3 Reviews
Share your thoughts with others:
Rating Distribution:
5 star:
.
.
67%
4 star:
.
.
33%
3 star:
.
0%
2 star:
.
0%
1 star:
.
0%
what's this?
Average Attributes Rating:
Durability
4.3
Value
5.0
Features
4.3
Design
4.3
Usability
5.0
what's this?
Most Helpful Customer Reviews:
June 9, 2009 The BEST sound at this price range!!
Review by
Danny from Lebanon, OH
Overall
Durability
Value
Features
Design
Usability
I came across this headunit and was instantly in love. Everything it does and how well it sounds for this price range is incredible. I've been rocking out with it for 2 years and have had it cranked pretty much that entire time. I would reccomend this headunit for anyone regardless of how careless or picky they are about their audio if you don't want to spend an arm and a leg on a high-end headunit. Kudos, Boss.
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May 2, 2009 Just Perfect!
Review by
demossav from Voroklini, Larnaca, Cyprus
Overall
Durability
Value
Features
Design
Usability
I really like this head unit. Installation was pretty easy. It has an unstopable list of features. It has everything I need. The sound output is very clear and the radio sounds well too. It is very easy to operate. And I really love the 2 color illumination.
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January 21, 2009 good deck for the money
Review by
Brian from Salinas, CA
Overall
Durability
Value
Features
Design
Usability
It is a cheap deck that has a good preamp output and I don't have any speaker running directly off of it but it says that it can give them some power. It is in my 1996 grand am and I plan on replacing it with a Panasonic deck but for now it works and I like the fact that you can turn your sub on and off.
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iPod Adapters and Cables
An iPod adapter/connection cable will allow you to listen to music through your car in-dash stereo from your iPod, charge the iPod, and usually control the playback and playlists through the in-dash head unit too.
 ProductPriceAdd?
Boss iPC40Boss iPC40
This iPod cable is made specifically for the audio playback of this in-dash receiver.
$19.99
Expandable Storage Accessories
Get more out of your new in-dash car stereo with these storage accessories.
 ProductPriceAdd?
Kingston 8 GB SD CardKingston 8 GB SD Card
8GB SDHC Memory Card Class 4
$13.99
Transcend TS4GJF500Transcend TS4GJF500
4 GB JetFlash 500 USB 2.0 Flash Thumb Drive
$19.99
Installation, Tools & Accessories
Get your car stereo receiver installed by an expert, or do it yourself with install tools and accessories found below.
 ProductPriceAdd?
Monster Cable MPC CLNKIT-SM CNMonster Cable MPC CLNKIT-SM CN
2 Bottles of LCD Screen Clean with Cleaning Cloth
$5.99
Scosche TK12 Car Stereo Installation KitScosche 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 Ties18 Butt Connectors, 2 Ring Terminals, and Zip Ties
Great for connecting your car stereo wires to the harness.
$5.99
SoundKase DFC1XSoundKase 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!
 ProductPriceAdd?
AutoSound 2000 CD-103AutoSound 2000 CD-103
Audiophile reference series test disc for evaluation of all audio components.
$12.99
AutoSound 2000 CD-102AutoSound 2000 CD-102
High frequency test CD specifically designed for the set-up and evaluation of sound system imaging and placement.
$12.99
AutoSound 2000 CD-105AutoSound 2000 CD-105
Demonstrates different characteristics and specifications of an audio system.
$12.99
Sonic Electronix Stickers
Show off your Sonic Electronix pride with a decal for your car! Choose the size that is best you!
 ProductPriceAdd?
Sonic Electronix StickerSonic Electronix Sticker
4-1/2" Vinyl SonicElectronix.com Sticker (Blue)
$0.25
Medium Sonic Electronix StickerMedium Sonic Electronix Sticker
6-1/2" Vinyl SonicElectronix.com Sticker (Blue)
$0.50
Large Sonic Electronix StickerLarge Sonic Electronix Sticker
13" Vinyl SonicElectronix.com Sticker (Blue)
$0.99
Related products
Scosche IFWA
Plug and Play Charging Adapter for iPhone 3G • Charging Adapter For Select iPod Nano, iPod Touch, and iPhone 3G • Specifically Designed to Fix the Charging Error

Product Summary

Manufacturer: Boss
Model number: 640UI
UPC: 791489106467
Weight: 5.50 lbs
Internal SKU: 640ui
Internal product ID: 8890
Musical Mayhem Sweepstakes sponsored by MTX Audio. 3 winners, $2,300 in prizes!

Customer Testimonial

I have had a very pleasent shopping experience. The price was below most sites I visited. The package arrived on time and just as described. I called tech support regarding some wiring issues and received a response within 24 hours. Sonic went beyond the sale and helped me. Thanks.

- Adam S. from Long Island, New York

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