Battery powered boombox: battery charging

[Waff0l]

As a hobby project, I'm turning a set of old Philips 22RH427's into a pretty hefty boombox, which obviously needs to be able to run on batteries.

As a starting point I have a mains transformer laying around (33V-0V-33V @2.25A (75VA)). I'd like to prevent having to design a mains-operating power supply for my own safety.
At the end I want dual rails, capable of delivering at a maximum 50W to the amplifiers (continuous power will be less as in most audio applications), as well as some batteries for storage.

I already made a design using a BQ24450 (datasheet) , charging two AGM (wiki) batteries.
I'd really like some feedback 

[NiHaoMike]

You don't need active balancing with lead acid.

[Zero999]

The part number for Q2 is for an NPN transistor. Did you mean the TIP32?

[Waff0l]

The part number for Q2 is for an NPN transistor. Did you mean the TIP32?

Yes, my bad

[Zero999]

The part number for Q2 is for an NPN transistor. Did you mean the TIP32?

Yes, my bad

And, 741 won't be nearly powerful enough for SLA batteries. If you want to add this feature, add a series resistor between 741's output, or it may fry itself instantly.

Yes, booster transistors need to be added.

The uA741 may also be unstable with those massive capacitors on the output.