Wire A Sub in without amp
 

Can I put a Sub in place of a speaker?

Hi there, I was wondering is it possible to wire in a sub in place of a speaker. So I would have 2 speakers in front 1 in back and 1 sub in place of a speaker?

You could, but would it be audible and worth it, No.
And you run the risk of ruining your head unit

ok thanks, and how would it ruin the headunit? (i dunno much about this stuff)

u dont need an amp. sound comes from the deck anyways.

different ohm's(standard car speakers are usaully 6ohm) subwoofers are 4ohm?(some come 2ohm, and various)

And Yuli....always a joker...

true that my friend ... hahahahhaa

Could you? Yes. Should you? No.

Most subwoofers require quite a bit more power to drive their coils than an average speaker cone. If you are talking about a 6" woofer from a component set that is a little different. These can be run off of a solid head unit but remember, you are losing any high frequencies, all you will get is bass tones and no "music" per se.

Hey I was wondering, could I bridge a 2 channel amp that has 180watts per channel into one channel and run my sub off that and my speakers powered by the receiver? How would I connect my amp to the receiver, btw the receiver I have is a Panasonic CQ-RX100u. Thanks for all the help!

see now this is more like it, Yes you can bridge the channels and power your sub, wiring it you would need a amplifier kit, Or just take it to a shop.