how would i wire this transformer

Thread Starter


Joined Feb 21, 2021
i have a home cinema powered subwoofer which had a transformer 240v/12v and the wires to the transformer were 2 blue and 1 black as shown in picture and need to know how would i wire in a 12v power supply. i want to put this in my car as its 200w to run my 6x9 speakers. many thanks in advance and feel free to reply



Joined Feb 20, 2016
You can't really.
That is a center tapped winding and it will give + and - "12V" (actually +/- 16V or so) for the amplifier.
Also, it will only be 200W in the advertising department's eyes.
You will do better to buy one designed to run in a car.
But 200W in a car is really quite dangerous, as well as I think quite annoying to those poor people who have to put up with the Duuff Duuff supposed mating call.

Audioguru again

Joined Oct 21, 2019
Yes, the 12V in a car cannot produce the needed +16V and -16V that the amplifier needs. An ordinary modern bridged car amplifier produces 200 Whats or 15 real Watts into each 4 ohms speaker.
Also, your subwoofer amplifier might have filters for it to produce deep low frequencies that 6 x 9 speakers cannot play.