Alot of these small amplifiers use the same chips/ic's/integrated circuit all in one package amplifier chips that are used in the back of radios. Most of them are 22 watts x 2 or 22 watts x 4. Yes, using an amp with those chips would be the same as using the speaker wires coming out the back of your radio to power your speakers.... It might actually have a step up power supply with rectifier diodes and filter caps and an input and output section, like a larger amp, just way smaller, way less power, but likely judging by it's size in your pics, it has the "radio" output chips in it, and they call it an amplifier, after all, it is an amplifier anyway, just a mighty weak one and very inexpensive to build since it's output section is powered by the 12VDC in your cars electrical system, and not a high voltage step up power supply like in larger (normal) car stereo amps.