Most standard aftermarket car speakers are 4 ohms each so ill use that assumption for my diagram. This subwoofer wiring application includes diagrams for single voice coil svc and dual voice coil dvc speakers.

Jl Audio 10w0v3 4
Amp and sub wiring diagram. 4 ohm mono is equivalent to 2 ohm stereo. The extra gear youll need for wiring the amps includes. The following diagrams are the most popular wiring configurations. Diagram how to wire a 4 channel amp to 4 speakers and a sub. Sadly if you wire the diamond subs in other ways they either will be too low of a load for the amp 1 2 ohm or cant develop full power wired as 2 8 ohm speakers. Click to download the printable speaker diagram.
A svc speaker has one voice coil and one set of terminals one positive and one negative. Check the amplifiers owners manual for minimum impedance the amplifier will handle before hooking up the speakers. Thomas this diagram shows two dvc 4 ohm subs wired together in parallel to the amp. The system depicted includes new speakers an aftermarket receiver a 4 channel amp for the front and rear pairs of full range speakers and a mono amp for a subwoofer. A dvc speaker has two voice coils each with its own set of terminals. This wiring diagram shows how a full blown car audio system upgrade gets wired in a car.
You could also wire the second sub to the amp directly instead of to the other sub and achieve the same result. Regarding the power i would say try it and see what you think as how it sounds etc will depend on your subwoofer box too. Always be sure to check your speakers before you wire them to your amp to be sure theyre compatible. A dual amplifier wiring kit. They show a typical single channel wiring scheme. When subs are wired together their individual impedances dont change the amplifiers sense of what load its driving does.
Single voice coil wiring options.