89fbrestor

hey guys i picked up some speakers and an amp and would just like to make sure i'm hooking them up correctly.

its a truck box with three 10' dual voice coil subs(4ohm)

and a kenwood amp that is a four channel bridgeable amp.

this is just a tempory system i just want something to listen to while working on the car.

i in laymens terms .... please help lol i hooked it up bridged with pos and neg going to same on one side of 1st sub then connected same to other side of sub then from that 2nd terminal on the 1st sub went to the sub #2 and repeated... is that right.

i turned it on and the amp kept cutting out and got hot extremely fast so i disconnected it. litteraly on for about a minute and a half.

thanks for any help guys.
brian

devestator_x

iTrader: (1)

Let me make sure I am reading this correctly... you bridged it first, then ran positive from one speaker terminal to the next, and did that for all 6 voice coils? Rather than just say, Ok, you are doing it wrong, let me explain... Heres the issue with that...

When you bridge an amp, that drops the impedance in half right off the bat. If you have a 4ohm speaker and hook it to a bridged amp, the amp "sees" a 2ohm load.

Heres where this story gets worse. Every time you connect 2 voice coils in parallel, you cut the amount of ohms in half. So 2 4ohm speakers wired in parallel is a 2 ohm load. Now, take that 2 ohm load and hook it to a bridged amp and that becomes a 1 ohm load. This is only speaker now with a dual voice coil. you did this 3 times over.

Here is the recommended way to wire this up... 3 dual voice coils, 4 channel amp.

http://a248.e.akamai.net/pix.crutchf..._4-ohm_4ch.jpg

Wire each voice coil in parallel per speaker to create a 2 ohm load, then hook each lead to a separate channel on the amp. That way each channel is only under a 2 ohm load, which wont stress the amp too much.

89fbrestor

devestator, thank you so much. that was great info and made perfect sense. when i was in my teens and early 20's i played with this stuff all the time.. I'm only 36 but now when i try hooking this stuff up i have to spend and hour on youtube just to turn the stuff on lol thank you very much i truly appreciate it. i assume this is why my amp cut out when the bass hit. i'll redo them tomorrow and let ya know.

thanks
brian

devestator_x

iTrader: (1)

Hey no problem. Im 35 myself, and I always forget the labels for series vs parallel. Just glad I was able to help in a way that made sense.

AJ_92RS

Explain.

Perhaps you mean, "each channel sees half of the resistance"?

soul.justice

http://www.caraudioforum.com/showthread.php?t=97288

This explains bridging pretty well.

AJ_92RS

Exactly what I thought was meant, but stated differently.

Here's another explanation of bridging.
Perry rocks!

http://www.bcae1.com/bridging.htm