Characteristics and Properties of Wireless Portable Speakers

the comprehensive guide to everything you need to know about wireless portable speakers

If you’re curious to know about wireless portable speakers, this article goes into great depth on every aspect of these devices from construction, materials, acoustic properties and more.  Boombotix has been building wireless portable speakers for over three years now, so we figured we’d share some of our knowledge for your reference.  If you are looking to build your own wireless portable speakers, you may also want to reference this article on hardware product design.  You may learn a lot from our product design and use it as a starting point for your personal wireless speaker project.  If you have any questions, feel free to comment and we will see if we can be of assistance.  Let’s get right into it.

1. Wireless Portable Speaker Overview
1.1 Primary Parts and Funtions of a Wireless Portable Speaker
1.2 Why most wireless portable speakers use Bluetooth
1.3 Bluetooth Signals and Protocols
1.4 Other wireless audio protocols
2. Parts and Characteristics of Wireless Portable Speakers in Detail
2.1 Speaker Diaphragm
2.2 Speaker Magnets/Audio Transducer
2.3 Impedance Rating
2.4 Weatherproofing/Ingress Protection Rating
3. Portable Wireless Speaker Electronics
3.1 Class-D Amplifier
3.2 Bluetooth Module with Built On MCU
3.2 Lithium Polymer Batteries
4.Mechanics of Wireless Portable Speakers
4.1 Wireless Portable Speaker Acoustics
4.2 Portable Speaker Connectors
5. Firmware Programming on Wireless Portable Speakers
6. Where to buy Wireless Portable Speakers
7. Conclusion

1  Wireless Portable Speaker Overview

This is an exploded view of the Boombot REX2 wireless speaker.  This rendering shows you all of the primary mechanical components typically found in a wireless portable speaker.

This is an exploded view of the Boombot REX wireless speaker. This rendering shows you all of the primary mechanical components typically found in a wireless portable speaker.

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Top Portable Speaker Showdown: Boombot REX vs Boombot 2 vs JAM Plus

Review and demonstration of three of the most popular Bluetooth portable speakers

In-depth comparison between three of the most compact, ultra-portable speakers on the market today.

Portable-Speaker-Review of Bluetooth Wireless Speakers

Let’s get at it!

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Taking the Battle for the Title of Best Portable Speaker to the Streets

we ask random people to compare the jawbone jambox to the boombot REX on the spot

To say that we were blown away by the response from this little field test we did would be the understatement of the century. Basically, here’s what went down: We went to our favorite outdoor digs and asked some of the locals to compare two portable speakers: the Jawbone Jambox and the Boombot REX.

It was a beautiful day out, so we didn’t want to take too much of the people’s time by asking them really deep questions. Instead, we asked some simple considerations one goes over when trying to decide whether or not to purchase a portable speaker:

  • Which portable speaker is more easily transportable?
  • Which Bluetooth speaker has a better design?
  • Which speaker had the best sound?

The people were very honest in their responses and luckily we had a camera handy to record everything.

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Best Outdoor Portable Speakers Showdown

Best Outdoor Bluetooth Speaker- Turtle-Shell-v-Boombot-REX

a wireless portable speaker match up for those craving adventure

The Boombot REX and the Outdoor Technologies Turtle Shell have quite a lot in common as outdoor portable speakers.  Both of them were designed for the outdoors.  Both ran almost equally successful launch campaigns on Kickstarter.  Each has a somewhat sharp edged geometric design.  They each feature microphones, dual drivers and passive radiators.  So what’s the difference?  That’s what we’re here to tell you.  In December we did a comparison of an older model of the Boombot REX and the Jambox.  Check that out as well if you want a little more data.

the differences in size shape

The OT Turtle Shell is at least 40% larger than the Boombot REX.  If you are ACTUALLY looking to make moves, you might want to think hard on which unit you’d like to lug around.  The Turtle Shell has a loop where you can dangle it… but to be quite frank, I’d be worried about that unit hitting me where the sun don’t shine.  The Boombot REX is more of a palm-sized piece with a built-on clip for much more seamless transport.  Much more of an on-the-go product.

differences in sound

In our recording of Basement Jaxx, the OT Turtle Shell was barely clipping into the mid 70s on the decibel meter.  We saw it max out around 75dB on even the punchiest part of the song.  The Boombot REX on the other hand put out well over 85dB exhibiting sheer dominance in output.  It is odd because typically a larger cabinet allows sound designers to build a lot more around better acoustics, but this is one case where the David destroyed the Golliath.  Watch the video and you can really hear and see the difference.

the verdict

The OT Turtle Shell retails for $149.99 while the Boombot REX starts at $119.99.  Call me crazy but bigger isn’t necessarily better.  If you want the best outdoor portable speaker, look no further than the Boombot REX.


Portable Speaker Review: Jawbone Jambox v. Boombot REX

Portable Speaker Review- Jawbone Jambox v. Boombot REX

comparing the best wireless speakers in the game

In December we ran a comparison on our Boombot REX going up against the Jawbone Jambox and the Outdoor Technologies Turtle Shell.  At the time, the Boombot REX was holding it’s own on the Jambox.  It was  outputting about the same volume across most of the spectrum with a little bit less bass.  Both of the units performed significantly better than the turtle shell.  After a couple more months of fine tuning, we’ve actually manage to accomplish even more with our nano acoustic engineering.

the evolution in audio

The Boombot REX features a CSR BC5 bluetooth module.  We realized that there were certain frequencies that the unit responded to better and some that caused distortion. We spent numerous hours understanding exactly which frequencies these were.  We modified our firmware profile have a built-in profile in the DSP (digital signal processor).  What we were able to do is bring up even more mids and highs out of our device while also providing robust bass output.

This is all about allowing each driver to move more air in a crisp fashion.  You need a full understanding of exactly which frequencies cause distortion and which ones you can increase the gain on.  We isolated each frequency band with a pretty tight resolution and created a custom equalization curve to get exactly the acoustics we were looking for.
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