Basic how-to for TA2024 (Dummy here..)

[clong]

Afternoon chaps,

This is my first attempt to do any DIY audio and it's got off to a terrible start.

I purchased one of the super-cheap TA2024 boards from ebay (like Arjen Helders but from the UK).

I've hooked it up directly to some speakers which measure 7.2 Ohms on the multimeter.

It's connected to a 12v SLA battery which I've just charged and is running about 12.5V, and connected it to my phone (Galaxy S2), tape-out from my hifi receiver, and my Raspberry Pi, and my TV's headphone out.

None of these seem to be working to power it- If I listen VERY closely I can hear that it is playing the music, but we're talking about so quiet that the slight hum from the speakers drowns it out.

Have I done something completely wrong, or is it a broken board?

(The speakers are tannoy mid-bass 5" cones or Sony 6" cones).

I have checked the polarity which is correct.

 

[clong]

A quick continuity test revealed I had plugged my source into the wrong socket.

Quickly solved!

I'm surprised how powerful the little amp is- it can certainly push the speakers to their limits!

Do these work okay with Piezo tweeters?

Is there an equivalent-ly cheap crossover I can use for a super low-cost setup?

Thanks!

 

[alex1966]

What slope do you require? Also do you know the input impedance of the amps? if so I had success in the past using a passive filter at line level and you can quite easily build it on a bit of tag board or prototyping board etc.