BassRygg

Always state your goals!

1. Wearable Bass unit for portable use with smartphone audio player

2. Compact, Modular design

3. "Tactile" bass frequencies (20-50Hz)

3. Drop-in mounting to hiking water carrier backpack

4. Rechargeable battery for a couple of hours use

5. 3.5mm standard audio jack connection

Possibility to add bluetooth connection later.

I'm still puzzling over the resonator material.

The speaker/exciter needs to mount to something dense but very light that will propagate the low frequencies, but that I can easily shape to fit.

I'm thinking something like a thick yoga mat maybe...

Decided that the actual backpack part would be easy - a regular hikers water carrier will be the 'case' of choice:

It already has a pocket which will be about the right size and will hold the unit close to the wearer's back.

I also have a redundant PC speaker set with subwoofer which will form the basic electronics.

Still need to arrange a suitable battery for this.

I plan to  test with the original speaker (although it's only a cheapie) as a POC. Researching around the Dayton Audio Bass Exciter looks like it will operate down the the frequency range required (sub 50Hz), so I will source one of these eventually.