Car audio?

Hi

This is a question for anyone who knows about car audio. My car has the standard speakers (2 front, 2 rear) and whilst the front ones aren’t bad, the engine and road noise are pretty loud so I like to turn it up a bit when I’m on my own.

What I plan to do is replace the rear speakers with Speakon connectors so I can connect one (or two) of my 15" PA speakers when I have the room. Conveniently, I run a PA hire company so I often have an excuse to carry speakers in it anyway, and I don’t have the room for an installed sub.

As far as I know most car speakers are 4 ohm. My PA speakers are 8 ohm. My question is this: Is there any risk in doing this? Is it possible to blow the amp in the car head unit or anything bad like that? I have given it a quick test and I’m happy with the sound. The only issue is am I likely to damage anything?

Also, if I fancy using my car as a PA system (camping or something???) and decide to connect 2 speakers in parallel to each rear speaker connection (4 ohm load on each) would this cause any problems? It seems a bit too good to be true that I should be able to get a standard head unit to make this much noise without damaging the amp.

Any comments would be appreciated.

Cheers!

Yeah. I just disconnected them and replaced them with a cable to test the speaker. If nobody tells me any horror stories about it then I’ll make a proper connection socket in the back and remove the rear speakers entirely. The standard rear speakers are absolutely terrible quality so I’m not losing anything by removing them.

One advantage in using PA speakers is that they have much better sensitivity than most car audio speakers so even at 8ohms they’ve got plenty of power.

Cheers for the comments.