Head Unit and New speakers question

[DukeNut 10+ year member]

I am installing new speakers and running new wire to them from the amp i am installing. The head unit is pioneer deh p3000ib. My question is do i need to unhook the old speaker's wires from the hu that are wired to the old speakers (they are wired directly into the stock speaker wiring) once I run rcas to the amp? My next question is i am going to bridge the 4 channel amp so do I need to run a set of rcas to the front inputs on the amp and another set to the rear inputs?

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[keep_hope_alive Premium Member]

The speakers can only be connected to one source. If you install the amp, disconnect the speaker wires, preferably at the head unit, then crimp a cap on the end to protect them from shorting out.

Some 4 channel amps have a switch for 2 or 4 channel input. Cheaper amps do not. If you don't have that switch, you need a y-adapter.

 

[DukeNut 10+ year member]

Thank you for the help. The amp has a switch for 2,3, and 4. Do i set it to 4 or 2 since it has 2 sets of rca inputs?

 

[keep_hope_alive Premium Member]

try 2. it would help if i had a link to the amp or manual.