You must use the phone instead, which I found inconvenient. Unlike many Bluetooth speakers that have speakerphone functions, such as the Mini Jambox and Soundfreaq Pocket Kick, on the Mini Boom, you can't control the call from the speaker there's no button to accept or end a call. The voices of people I called were clear, and people I called reported the microphone on the unit performed comparably to the one on the iPhone. The speakerphone worked well, improving the volume of my conversations compared with the iPhone's built-in speakerphone. MORE: The Best Headphones Available Now Speakerphone The Mini Jambox better balances treble, bass and midrange tones to produce a better overall sound.

McCartney's acoustic guitar on 'FourFiveSeconds' lacked the crispness the Mini Jambox produced, and the horns on Charles Mingus' jazz classic 'Goodbye Pork Pie Hat' sounded flat overall. The Mini Boom lacks brightness in the treble tones, which can cause it to sound a bit flat. However, the bass is not well balanced with the treble the Mini Jambox produced an overall better sound because the bass, treble and midranges were better aligned. The bass break in the Beastie Boys' 'Shake Your Rump' rattled the table, which the Soundfreaq Pocket Kick couldn't do. Rihanna's vocals stood out above Paul McCartney's acoustic strumming on 'FourFiveSeconds,' while Diana Krall's contralto tones resonated richly on her version of 'California Dreamin'.'Īs I raised the volume to 80 decibels, the bass on Mark Ronson's 'Uptown Funk' took over. The Mini Boom's strengths are in the midrange and bass tones.

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