Laza1

Hello! Finally installed my new head unit to my Gs 300!!!
Speakers wired in standard mode, sub wired in bridge! (Bridged front speakers) Front left + and front right -
I switched ACC and turning on my sound system and i have a high freq noise! Anybody can help me???
I just wiring my new head unit with integrated amp to speaker wires! This is bad? I need anything?
Tomorrow record my noise and upload here.

firelizard

iTrader: (1)

Do you have power wires near your signal wires? Is the resistance of your speakers correct for your head unit's amplifier? Why is your sub running off a bridged signal for the front speakers? That doesn't make any sense.

I think you need to take your car to a professional, or read up on how to install car audio before attempting to continue.

Laza1

I have a factory wires connected to my aftermarket HU iso connector.
Resistance? I just wired my speakers with official lexus wiring diagram! Not good? I need resistance?
I bridged sub speakers i have only 4 channel i don't have a separated sub channel. Not good? Why?
I read professional wiring methods and use it.

TW99GS300

I don't believe I've seen any headunits designed to have it's channels bridged. That's probably where I would start looking.
There's a product made by beatsonic designed to keep the oem amp.
Or you would need to bypass the oem amp and wiring in a separate amp to power the sub.

Laza1

Ok. I have 4 channel. How to wire my 4 front , 2 rear and sub? My head unit have integrated amp! My factory amp has been bypassed!

firelizard

iTrader: (1)

You need 5 channels. And the front tweeters and woofers receive separate signals with high and low pass crossovers, so you need to have that in the system as well.