Depending on what you plan on using as your music source, and with a little work on the 12v wiring one of these could be used as well.
Since they are modified 12v car stereo amps as it is, the only wiring change is splicing to the wires of the AC adapters cord.
The one above would allow for an 'aux' cord input. There is another model that works through a Bluetooth connection. Both amps have an integrated volume knob, would work well for a simple 2 speaker setup, and are small enough to position within easy reach.
They also allow for a more stealth install without cutting up or risking cracking a nice dash.
If there is room in the budget another choice is this:
It's an all in one set up intended for use in vehicles already. It's Bluetooth capable and has a nice control box. It would power 2 or 4 speakers.
The drawback to both is no normal radio connection, but most radio is accessible via apps anymore so it could be done that way.
- Charlie69 likes this