Adesso came with speakers everywhere!!  These were all car audio speakers and very tired!  I prefer a higher quality sound and this does not have to cost more!  In fact if you have a little DIY streak you can create amazing sound for very little.  Renown for its sound quality the Lepai’s amplifiers are 12volt and are amazingly cheap.  These work well with todays digital player world with both RCA and 3.5mm inputs.   I used the 168AH ( approximately 50.00 ) which has  subwoofer  capabilities in the main salon.  This coupled with a pair of DIY Fonken speakers and a built in sub under the navigation table.  Check out www.planet10.com for plans and drivers for these amazing speakers !  I then put a separate Lepai 2 channel  ( less than 30.00 ) connected to a couple of marine Jensen speakers in the cockpit.   This allows sound volume to be separately adjusted between the cockpit and the salon.

Lepai Stereo amp with outboard key for scale.

Fonken book shelf speaker

Sub woofer under navigation table