Personally, I gave up on the 'sound' my NL produced shortly after purchasing it. Others have had some success in merely replacing the OEM speakers with quality models from other vendors.
My solution was to get a Bose soundlink to stream music from my phone/ipad's. While Bose no longer makes the soundlink, there are dozens of OEM's+models of bluetooth speakers available. Added benefit is that these are portable so can be brought outside to the picnic table with you while camping.
I would however suggest demo'ing whatever your considering in person before buying. While some have remarkable sound others not so much. Price does not seem to dictate the quality of the sound emitted from these devices.
- Mark0.