Bike Speakers front and rear facing from old computer speakers with Bluetooth added.

Picture of Bike Speakers front and rear facing from old computer speakers with Bluetooth added.
The mission: To create a low budget speaker system with good volume to overcome road noise. In addition my wife is usually biking behind me so it needs to be loud enough for her to hear too.

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Step 1: The bike in question.

Picture of The bike in question.
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The back rack.

Step 2: The parts.

Picture of The parts.
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I have a lot of old computer speakers so I sorted through them to see if I had a pair that was  the right size and shape. The sound quality was also important as well as the ability to convert it to battery power. I finally settled on the
Altec Lansing BXR1120 2.5 music and gaming speaker. It was originally powered by a 9 volt ac wall wart. I first tried powering it with a 5 volt dc USB Battery pack but the sound was noticeably distorted over the wall wart especially as the volume was raised. I then went to RadioShack and bought a 8 cell aa battery holder for $3. This gave me a little over 10 volts dc with rechargeable cells at 1.2 volts each. This seemed to match the sound of the original setup.
 I also wanted to have bluetooth wireless capability I found a cheap unit on Amazon that looked like what I was after. The Enerpak Tube 5000 mAh external battery pack was from living social but these things are everywhere now days. I actually have a smaller battery pack that I was planning on using if it last long enough for a bike ride.

Step 3:

Picture of
Next Order of business was to mount it to my bike. I set the speakers on the rear rack to see if it looked like they could possibly work out. Plugged them in and turned up the jams. They had good volume and quality for what they are. For the price they seemed to be just what I needed.

I had found a good deal on some saddle bags over Christmas not realizing they would stick up above the rack surface. This seemed to work to my advantage though as these speakers seemed to nestle in between them.
wtrayner1 year ago
admire your handwork but it is a bit annoying at time walking in the nature and getting bothered by other peoples music ... happens in china alot. untouched nature, then some dipshit walks by with a backpack stereo system. my tip.. use earphones.

I can definitely understand the frustration there. I've found it necessary to have an external speaker when riding though. If you use headphones, you're deaf to what's going on around you and put yourself in considerable danger. In any case, based on the bike he's modding and the description he provided, I'd guess he's only going to be on the road with this, leaving trail riders and nature appreciators free from unwanted music.

This is a great idea and I bet it adds a lot of fun to bike rides! Have you gotten a chance to try it yet? I'm looking forward to seeing more projects from you, you did a great job with these pictures and write up!