2 Channel amp no headunit

**skippy911** · 09-30-2005, 10:58 PM

Hi, Can I hook up a 2 channel amp with no headunit by combining the front left and right speakers, and the back left and right speakers and running them into the amp that way? I was given an old jensen 2 channel amp so I would like to use that. Also what is the rca part used for? I was going to just run wires from the headunit harness since its not being used anymore into the trunk for the amp.

Any help would be greatly appreciated. And I did search but everyone seems to be using 4 channel amps.

**neon_eddy** · 09-30-2005, 11:09 PM

yeah . you can.. just see what ohms the amp is rated, keep in mind if you run 2 speakers of 4ohms each in parallel the total ohms is now 2, this could b e bad for the amp. but if you run in series total ohms is 8 .. I'm not sure if that's bad... but I know you need to consider this.

**skippy911** · 09-30-2005, 11:12 PM

Im totally clueless when it comes to car audio. How would I wire it differently for parallel vs series? And why is one better than the other?

Thanks

**neon_eddy** · 09-30-2005, 11:15 PM

http://www.termpro.com/articles/spkrz.html first entry in google "series vs parallel"

you owe me $20 now too :-)

**skippy911** · 09-30-2005, 11:25 PM

Wholly crap thats alot of equations but least now I know the difference. The amp I have is the jensen a82. On the back it says, "12v negative ground . Use 2, 4 or 8 ohm speakers." It also says, " Do not connect right speaker negative to left speaker negative or to car body (ground). So I guess that throws out the idea of putting them in parallel right? If I put them in series will I be ok?

THanks again and if I had 20bux to give you I would just go buy a 4channel amp hehe im poor

Edit: I found out from ready on vwvortex that the stock speakers in my jetta are all 4ohm each. I also have tweeters will those pose a problem? The amp is a 40Wx2 stereo amplifier.

**kevinlekiller** · 09-30-2005, 11:44 PM

If I were you I would do this : Connect Front Left , Back Left speakers in parallel (2 ohm load) ; Front Right , Rear Right in parallel (2ohm load). You conserve the the stereo sound this way , and if you put them in series you have lots less power going into the speakers( 4 times the resistance ).

**skippy911** · 09-30-2005, 11:51 PM

By doing so I would only be able to change the balance left to right not the fade from front to back, am I right? I want to hook them up to control the fade from front to back.

forgive my newbiness.

**kevinlekiller** · 09-30-2005, 11:54 PM

But that way you would have mono sound. If you prefer fade than go that way

**skippy911** · 09-30-2005, 11:58 PM

I dont want mono sound that would suck. I thought if it was done that way I could have the sound set in the middle in windows ie not all the way to the left or not all the way to the right, thus I would have sound coming out of both the left and right speakers, front and back. I am probably just confused here.

**kevinlekiller** · 10-01-2005, 12:03 AM

Originally Posted by skippy911

I dont want mono sound that would suck. I thought if it was done that way I could have the sound set in the middle in windows ie not all the way to the left or not all the way to the right, thus I would have sound coming out of both the left and right speakers, front and back. I am probably just confused here.

If you conect both back speakers together , than they both get the same sound.

Same for front.

If you plug it that way , its techicly stereo, because 2 different sounds. But its mono because we create a stereo effect earing sounds from the side of our heads, not in back and front.