1986 Hitachi 25'' console.

[Jon A.]

Wattage is just the power handling of the speakers. Driving them with a higher-wattage amp could blow them. It's the impedance that matters more here. Parallel wiring would halve the impedance of each speaker, so for example two 8-ohm speakers would be required for a mono circuit that requires a 4-ohm load. No extra power would be needed to drive the speakers.