Fun Generation BP 108 A

Looking for an MP3 player in my "den", I saw this. An MP3 player alone can easily cost €100, but this BP 108 A is "all in one" MP3, amplifier, speaker and mixing desk, plus, it's also battery or mains, a great package for €70.
At full volume, its not gonna shake your house, but at sensible listening volume it's quite a pleasant sounding machine and not too big as to block a small room and light as a feather.
Mine is on a 35m wall bracket so I can spin round to make adjustments to the sound or change the SD card.
I tried the mic & guitar together, found some pleasant sound settings for a solo performance, but won't be using it for that, as 15w rms is not enough "punch" for my few live venues.
After a few re'charges, the battery gets its feet and lasts much longer than the first charge. Mine stays on most days as back ground music in my house.
No strange noises or problems yet, in fact I cannot find a fault or problem with this little beauty.
For this price, it's a beauty.

I have purchased two of these over the years.

To be honest. For the price it is simply unbeaten. I have used them all through the pandemic to dj on the streets and it is louder than speakers 5x the price.

My main issue now is after the second one has broken. I simply cannot bring myself to purchase a 3rd.

On both speakers. Components have burnt out. I believe due to the fact there is no internal fuse to protect from overcharging.

Tried moving parts from first speaker to second now and just got more smoke.

The speakers functionality is amazingly handy between bluetooth and mic inputs and usb for when the phone dies, the delay is also very usable.

Other improvements i would make would be to have a lineout so these speakers can be tethered, i know the larger models have this, but the bpo8 is really the perfect size and weight to carry in a backback and cycle around with. Larger models for the sake of linking would he cumbersome.
If this could be achieved via rca connection,
I would find that very handy to double as a record out function.

It would also be nice to have seperate volume controls for the 2 mic inputs but not totally neccesary.

The usb function is very hard to figure out. Often it will just play the least played tracks from a usb. So any instructions on how to order a folder to play in the desired order would be welcomed highly.

Also in case of usb, one should be very wary as not to snap off the usb port from carrying an extruding dongle. Low profile seamless usb sticks are ideal for this application.
If the usb could also record all inputs straight to a wav file. That would probably be more useful that having a usb player but would really want to be able to still use the rca input or bluetooth to be considered in the master recording.

Last but not least… i refuse to believe that it would not be possible to change the drive for one that can produce lower frequencies even down to 50/60hz would be a great gain. I understand this may affect battery life as the bass getting muddy is the first sign that juice is running low. With this improvement. The speaker could even be taken seriously as a studio monitor.
If even there was a sub version in the speaker size on offer for portability that be be linked, i could see this as a huge disruptor of this market.

I was really looking forward to trying the larger speakers in this family and unfortunately find it unwise to invest in the same tortures as of now.