Hey, I have a friend with a 08 nissan versa,she bought the premium stereo package,teac or tech,something like that.
Its not quite enuf for her and she wants to upgrade to an aftermarket amp/s,speakers etc.
Now,she wants to keep the factory h/u and what i was wondering is,is there anything else i would need for this other than a simple LOC? And would i have to disable the factory amp,or remove etc.?

any help welcomed

I did that when i first got my car. Kept the factory HU, used a 4 ch LOC, replaced all the factory speakers and added subs.
I had a 2 way crossover between the rear speakers and subs, and another 2 way crossover for the front components.
It was loud, but didn't have the SQ or control i wanted, so eventually, I replaced the HU as well, and added 2 disc changers. Still have the LOC i paid 39.95 @ best buy.

__________________
Alpine CDA-9887, TUA-T500HD, CHA-S634, CHA-1204 & KCA-410C
Pioneer TS-A6981, 6 x GM-5100T
Kicker 2 x CVR15,
MBQ RCE-216
PG MX2
Soundgate LanStar1
PAC SWI-ALP

Thanx for the info,the reason she wants to keep the factory unit is for usability purposes,cell phone works thru it and what not.
SQ is not gonna be a huge problem,at this point she just wants it loud lol.

I just wanna be sure there isnt any bypass modules etc,or the likes she may need before digging into the install.

Not sure it matters but it may be a 2007,not an 08.

anyone

Yes you need a bypass module ($100) and then you need to imitate the chip in the key (immobilizer?) which is another $100.

Took my guys a total of 6 man hours to get it all done ($800 later)

This is for the 2way compustar alarm/starter