Sony MEX-BT5100 review: Sony MEX-BT5100

Other dialing options include selecting from call history (which is also copied over from the phone and can be called up on the screen), by assigning and then selecting a speed dial number via one of the six preset buttons, or by manually entering a number one digit at a time using the joystick, which is probably the most time-consuming method. With a call under way, sound quality is clear and even: an option in the call menu lets drivers choose the speakers through which the incoming call audio is played. From the other end of the line, sound quality via the MEX-BT5100's mic is also reasonably clear, albeit a little tinny.


The monochrome LCD display shows ID3 tag information for MP3 discs.

One of the best features of the MEX-BT5100 is the way it manages to integrate phone and music functionality into the same device while keeping the controls so simple. For audio sources, the stereo supports AM/FM radio, regular Red Book CDs, MP3, WMA, and ATRAC-encoded discs, and external sources via a rear-mounted auxiliary input. Those wanting to branch out can also invest in add-on modules for iPods and HD and satellite radio. When playing MP3 discs, the monochrome display can be configured to display a whole host of information including folder and track information, and tags for song, track, and artist information. While we like the ability of the system to display ID3 tag information, we are less impressed with the navigability of digital audio files, as there is no way to browse folder/song/artist information other than skipping through files one at a time. In partial mitigation of this, a one-touch shuffle function lets drivers play back discs in random mode. Like its predecessor, the MEX-BT5100 also comes with the ability to play audio streamed by the A2DP Bluetooth protocol.


The MEX-BT5100 features a user-configurable equalizer .

All audio plays out through the system's built-in amp producing four channel's worth of 17 watts (RMS) output. Base sound quality is adequate (if a little flat), but it can be enhanced with a number of audio-tweaking functions. These include a three-band equalizer with six presets and a customizable EQ setting, a low-pass filter for customizing low-end crossover, and Sony's Dynamic Stage Organizer (DSO) function, which throws farther up into the car's cabin. The DSO function works particularly well for compressed audio formats, giving the audio a fuller, richer sound. For those who want to add their own external audio components, the MEX-BT5100 features a volume control for a separate subwoofer as well as three preouts for external amps.

In sum
With a price tag of around $330, the MEX-BT5100 is not cheap for a single-DIN car stereo. Its integrated Bluetooth hands-free calling interface, however, makes it more than a simple audio receiver, and for those looking for a good-looking, intuitive all-in-one entertainment and communications device, the MEX-BT5100 provides a compelling option.

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Sony MEX-BT5100

Part Number: MEX-BT5100
Low Price: $10.95 See all prices

Quick Specifications See All

  • Type CD / MP3 player
  • Type radio tuner
  • Car Audio Type CD receiver
  • Type audio line-out
    remote control
    subwoofer output
    system components control bus