I am installing an aftermarket headunit and i am wondering if i need any high or low pass crossovers. I believe my radio has them built in but i am not sure.I have a pioneer deh-5800mp.It washooked up but it didnt sound right.My question is,doi need crossovers, what frequency do i get, and also where do i wire them? Any help would be appreciated.

 

what year? mach?

 

2002, mach 460

 

it also depends on how you have your deck wired into the system but if you use the subwoofer output on the deck to go into the factory amps you will not need a low pass as the output has a x-over built in. If you do this and bypass the factory amps and use the deck to drive the tweets then I recommend picking up some 100 micro farad capacitors from the shack touse as a high pass cross over to take the bass out of the signal.

 

that radio has a high pass filter built into the radio audio controls but if you are bypass it the factory tweeter has a "bass blocker" built on to it.

 

ok well i used a metra 70-5519 wiring harness and wired everything normally except i wired the amp turn on (the 2 blue with white stripes) to the red ignition wires. I am adding a subwoofer so i am using the subwoofer output for that. So where i am at now i think i need low pass crossovers for my midwoofers because i have them plugged into the rear output on my deck..am i correct?

 

You are still able both amp turn on up to the radio( one for your sub amp and the other to the factory amps). It will not hurt anything hooking it to the red but your amp turn wire on the radio only gets power when you have a source on(radio, cd, ipod). Hooking it to the red just turns the amps on when the car turns on so if you turn the radio off the factory amps will stay. Like i said it will not hurt anything.
With having them plugged into the rear output they will get full range, if you plug them into the sub output on the deck then they will get low range. On your deck when you have them plug into the sub output you are able to change the low range for 120 to 100 to 80 and etc. But you have sub in the car so unless you do a y splitter that the only way to plug them both into the sub output to get low range.

I would keep them plug into the rear like you have bc you have subs to get low range.

 

I would use some Y-splitters on your rcas so you can use teh sub output for the factory woofers as well a for you new woofer

 

thanks guys.. got it done. first tried using the rear output and i couldn't get it to sound good at all, or at least to what it used to be. then tried the s/w output and bingo! that was it.. thanks again