I have a couple very large altec bluetooth speakers that, when linked directly from bluetooth, push about 85-90 db (measured with a decibel meter); which is great. I can alternatively connect to a separate bluetooth receiver dongle connected to the speakers with an aux cable without losing measurable loudness. However, when connecting to a pi 3B that’s running Balena Sound, and connecting to the speakers through the aux cable, it is considerably quieter (<80db). All the pis I’ve used are 3Bs. I have already changed the global environment variable SOUND_VOLUME to be 100 but it had little (if any) effect.
Are there any other changes that can be made or does this sound like a limitation of the pi itself? If the latter is true, are there recommended amp “hats” or other solutions to that end that work easily with BalenaSound? Or, are there other suggested solutions to not lose volume? The goal is to link a number of these speakers all together so the “buy more stuff for all the pis” solution is not optimal but understandable.
Thanks for any suggestions you all might have.