Powering a car subwoofer using a modified computer power supply

[Sleeper PC 2016]

I got a Kenwood KSC-WA82RC and I want to use it with a home theater reciever but the power connector is different. It uses a 10 pin connector. What I want to do is Cut and splice the power and ground wires from a pci e power connector from a ATX power supply onto a 10 

pin connector (I got the right connector for it I just need to wire it up). I’m gonna be using this picture off google to wire it up. Would this work? All I need is power, ground, and signal. The sub is also fused so I think if something were to short it’ll be safe.

[NTDaws]

I personally think you should get a proper amp. Even though it could work. It sounds unsafe as it wasn't intended for that use.

[meenmeen1103]

If you have a connector that physically fits in there, and assuming that pic is correct, you just need to either add the blue w/white stripe wire to power (yellows) to have the amp always on while PSU is on, or add a switch between the blue/white wire and power to manually turn it on. You'll also need to either plug a jumper on the 24pin on PSU or install a switch in it's place to also manually switch the psu on/off instead of unplugging.

[meenmeen1103]

9 minutes ago, Being Delirious said:

I personally think you should get a proper amp. Even though it could work. It sounds unsafe as it wasn't intended for that use.

It's a ~8" sub rated at 65W RMS, with the only website I found contradicting that RMS rating by stating the amp nominal at 65W and then giving a max "RMS" of 200W (def some janky ratings but in the very unlikely scenario the amp requires 200W stable to provide the sub with 65W continuous would mean the amp is burning off over 100W as heat, even the cheapest audio stuff I've seen isn't that electrically inefficient). If the PSU can at least maintain a constant 10A load on 12V, or ideally at least 15A, it should be safe given it's wired correctly.

[Sleeper PC 2016]

On 4/16/2018 at 11:18 AM, meenmeen1103 said:

It's a ~8" sub rated at 65W RMS, with the only website I found contradicting that RMS rating by stating the amp nominal at 65W and then giving a max "RMS" of 200W (def some janky ratings but in the very unlikely scenario the amp requires 200W stable to provide the sub with 65W continuous would mean the amp is burning off over 100W as heat, even the cheapest audio stuff I've seen isn't that electrically inefficient). If the PSU can at least maintain a constant 10A load on 12V, or ideally at least 15A, it should be safe given it's wired correctly.

thats how i wired it. Eveyone says its a fire hazard