Reusing dead sub with old 12.5 inch LG speakers as 2.1 TV setup

[RealSpyKitty]

Hello, so I am trying to reuse my old LG speakers LMS-M540 with a Microlab FC 50 subwoofer as an 2.1 audio setup for my tv.

 

The cheap Microlab subwoofer board somewhat died and the left speaker output no longer working, I thought about replacing it with this S350H TPA3251D2 amplifier board and powering it with the same 20v 1.5A power supply I used before.

As far as I understand by reading the manual the LG main speaker is a 6 OHM 50W and no idea about the tweeter.

 

Would this setup work? Any possible suggestions with this setup?

 

Can I hook up also the small Microlab speakers and have 4 in total?

 

Could I down the road upgrade the speaker with something better? 

 

I never worked with in depth with audio stuff so this is my first time doing something DIY in this field so I have no idea if I'm doing stuff right haha

 

[The Flying Sloth]

Yes, based on the info you've given and the product description that amp would be able to power your speakers easily, now, I do not have personal experience with the amp and as such cannot vouch for it but I can say that your power supply won't even come close to powering it fully and that the amp would blow up your speakers if you turned it up much, those speakers are extremely easy to drive.

Given that these are the Questions and Answers under the item listing, I'd be careful if I were you

[RealSpyKitty]

If that amp is too powerful there is similar one with lower wattage. 
Didn't find any other boards that are doing 100W x2 with a powered sub that don't cost a fortune when all I want to do is drive this speakers without any additional boards/amps etc...

 

[cmndr]

3 hours ago, RealSpyKitty said:

If that amp is too powerful there is similar one with lower wattage. 
Didn't find any other boards that are doing 100W x2 with a powered sub that don't cost a fortune when all I want to do is drive this speakers without any additional boards/amps etc...

It's hard to go "too powerful" with an amplifier. If it's set up properly it'll only provide the power that the speakers pull.

There is value in getting a higher quality amp that might not be rated as high though - think Aiyima a07