pkjai

i just bought an is300 2005 blk on blk stick. i have some questions about the audio system. if i wanted to change the stereo and add a subwoofer will i need to need to buy a replacement amp for the factory one?

dedott21

Yes,you do!or else your going to run in to problems!

dsouthmia0

iTrader: (3)

This^ I just did it

NCis300

iTrader: (2)

no just bypass the amp. i have a alpine unit in my car, no amp for the door speakers and it sounds fine, even better than the factory amp, but you must remove the factory amp

pkjai

thanks alot any recommendation for which brand i should get as a replacement for the factory amp

nervekiler

you do not need to ad an amplifier to replace the factory deck.

most times you can integrate with the factory amp, and about half the time when you do this it will sound fine, the other half may result in terrible sound.

you can run off of aftermarket head unit power which is usually 15-20w rms per channel.

you will want to buy a new amp for the subwoofer.

now which amp do you buy? this depends on the quality of sound, volume you want, and budget you have for said equipment.
first question i have for you is... how much do you want to spend? then how loud doyou want it? and lastly is sound quality important to you?

answer these and i will show you some options.

NCis300

iTrader: (2)

+1 ^, but ive heard the factory amp integrated and its god awful

BeatSonic

We also have a solution to change out factory head unit to an aftermarket one using a plug and play adapter to retain use of factory amplifier and factory navigation. It also comes with a JDM Toyota factory Altezza dash kit. You can check it out here: http://www.beatsonicusa.com/beat-sonic-sla-91.html

We had some CL members purchase these with great results.

Let me know if you have any questions!

pkjai

i have a kenwood headunit, a subwoofer and an amp for my sub already. what amp should i get for my car speakers?

nervekiler

for your factory speakers the factory amp would be best. i would reccomend first trying it out and see if it sounds good enough to you. depending on the kenwood deck you have, you might have a whole lot of control at your fingertips which will make running low level into your amp a lot easier especially with that harness from beatsonic.

if you get it in and dont like it.. there is always plan b.

dsouthmia0

iTrader: (3)

I am using a soundstream amp with soundstream speakers (no sub) and everything sounds MUCH better!! and much more clear. I also installed a new pioneer V1 headunit hardwired