Big G

Big G

GKT Design Co.

Project Category:
Portable Speakers

Project Level:

Project Time:
8-20 Hours

Project Cost:
$100 – $500

Project Description:
A 36″ portable Bluestooth speaker.

Design Goals:
To get a device that looks good enough and sounds good enough for it to be your one device. Home audio, patio or pool, or tailgate.

Driver Selection:

Enclosure Design:
This first attempt is in pine to keep cost down until I figure out how to construct it. I used a maze vent to get a bit more low end which worked out well. It was a totally guess on my part. The design software made my head hurt. Sounds Great!

Enclosure Assembly:
Brads and glue

Crossover Design:
High pass filter plate to the tweeters (cost saver) and I passed through direct to the woofers.

Tips & Tricks:
My only tip is to make sure you have enough room for all the electronics!

The sound is great, the battery life is great, the bluetooth signal need work on the next one, the looks turned out well. I will however do much better on the next one.

About the Designer:
Maker from Dallas, TX. Music nerd and learning wood working. Learning…. Learning…. hopefully someday selling

Project Parts List:

Dayton Audio KAB-BE 18650 Battery Extension Board for Bluetooth Amplifier Boards
Dayton Audio KAB-AB L-type Aluminum Bracket for Bluetooth Amplifier Boards
Dayton Audio KAB-250 2x50W Class D Audio Amplifier Board with Bluetooth 4.0
Dayton Audio KAB-FC Function Cables Package for Bluetooth Amplifier Boards
Panasonic SUPS135-11 Speaker Terminal Plate with Tweeter and Mid High Pass
Dayton Audio KAB-LED Red/Green/Blue LED Package for Bluetooth Amplifier Boards
GRS 1TD2-8 1″ Designer Dome Tweeter 8 Ohm


Add yours
  1. 1
    Daniel LaCorte

    Is there a schematic so that I can reproduce this speaker? I purchased the parts required but now need to work through the build.

    • 2
      Grant Treanor

      Sorry DLaC. I more or less wing’d it. I could not even tell you the measurements other than is 36″ long. I’m sure I could be improved upon with some more audio science. It’s big. Maybe too big to be a grab and go boombox. But, for my home and only moving it around a little bit it works great for me. Big sound once the speaker were broken in.

    • 4
      Grant Treanor

      The low end is “good”. It really depends on the quality of the mp3 I’m using. I’m almost 100% bluetooth mp3. On a nice modern studio album like Maroon 5 it’s great. Like Led Zeppelin and older stuff not so great. I also play with my ipod eq. Dance, hip hop seem to give the best sound. My tweeters do tend to over power a bit with no EQ settings used.

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