Could anyone consult me on a mobile subwoofer build?

Hello,

I'm in portland oregon and I love to ride with my friends on huge mass bicycle rides. We all have speakers on our bikes - interconnected with radios.

I'd like to add some lower end to our crew. Its not easy outdoors, but I'd like to try my best. I need help sourcing a woofer and an efficient amp for a speaker box in the 3.5-4 cubic feet size. (smaller is fine too)

  • full range not needed (other speakers are around)
  • Loud over deep bass - if tuning up higher helps volume, lets do that. (but still low and warm)
  • NOT high fidelity... just the best we can do while prioritizing volume
  • DC of course. Can't draw a ton of juice - but I'll get the right batteries.
  • Affordable, simple, lightweight are pluses

If I wasn't asking for help, I would drift towards a dual coil 15" PA speaker in a box ported up a little high for volume, run on a two channel 24v dayton amp board. Maybe run wide open just for more music. But I'm open to anything.

Does anyone have time to tell me what to purchase?
 
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You don't want to do something like this.
 

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