Which amplifier for a specific driver

I found this driver that was part from a Beringher pair of active speakers.
Its seems to be 4R driver ( I measured using multimeter)

How can I know the rated power of that driver?
Which amplifier is recommended?
The amp should be run on 12V

the use is for outdoor listening in fairly quite environment so volume shouldn't be too strong.
 
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That 4" driver is probably rated at no more than 20 W.

It's nominal impedance is likely to be 6 ohm.

Lots of small 12 V amplifiers can match those specs.

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The input of power to the amp depends on both the voltage and current capability of the chosen power supply.

A 12 V; 2 A DC supply could deliver a maximum 24 W of power to the amp (power = voltage x current).

The output of power to the speaker cannot exceed the input of power from the supply.

So, you'd be lucky to get a maximum of 20 W output from that amp using a 12 V; 2 A DC supply.
 
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