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Hey, i'm new here and an absolute newbie when it comes to car audio. I just wanted to know if i could just add an amp and sub into my car keeping everythign else stock. Like, can it be directly connected into the stock headunit, and how will it sound? I wanted to add a JBL 600x1 mono amp and a kicker L5 10".... please don't flame me for this stupid question... i jsut simply don't know...

 
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you need to use high input convertor you can buy those at bestbuy for around 15 bucks.i had my subs hooked up with stock cd player til today. i got new cdplayer stock speakers sounds soo much better now hehe

 
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When u say that the speakers sound so much better, does it mean that adding the sub will change how the stock speakers sound? or do u mean that just by changing HU, the stock speakers sound better than they originally did when u bought the car.

 
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he means changing the HU. the HU will put a lot more power to the stock speakers.

 
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he's not talking about changing the HU he's talking about this stupid little thing that takes speaker wires and turns em into RCAs.. don't just add a sub to stock.. all you'll hear is bass. It's a waste of money. Not to mention that those converters kill sound quality. Start with the HU and speakers, do the subs later.

EDIT: he was talking about changing the HU too, I didn't read the whole thing oops..

 
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yea stock headunit sucks.. just get headuint first then subs man. trust me on this one. i had subs with stock cd player. doesnt sound good at all.

 
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same...... all u hear is BASS.

 
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JL Audio has a good diagram of how to add an amp and sub to a stock system. Check it out here:

Example of amp and subs added to factory system

-DavidCPA