8 Speaker Amplifier Info

[jfulks78]

Hello everyone! I have scavenged the net looking for information about the factory amplifier installed in these vehicles and I have been unable to find ANY useful info. I have a 2009 RX350 with navigation and without ML.

I want to upgrade the factory audio system (head unit, speakers, sub) but I cannot find the output info on the factory amp to help me decide if I want to keep it or upgrade it. I would like to know the peak and RMS wattage of the amp. I would also like to know, if I upgrade the amp, would I still be able to add the steering wheel adapter to the install and retain usage of my steering wheel controls. I would greatly appreciate any info!

Thank you in advance!

[RX400h]

^{Have you physically checked the amp, itself? If the info you seek is not there, you may be able to contact the manufacturer or distributor.}

[pj8708]

Hello everyone! I have scavenged the net looking for information about the factory amplifier installed in these vehicles and I have been unable to find ANY useful info. I have a 2009 RX350 with navigation and without ML.

I want to upgrade the factory audio system (head unit, speakers, sub) but I cannot find the output info on the factory amp to help me decide if I want to keep it or upgrade it. I would like to know the peak and RMS wattage of the amp. I would also like to know, if I upgrade the amp, would I still be able to add the steering wheel adapter to the install and retain usage of my steering wheel controls. I would greatly appreciate any info!

Thank you in advance!

Hi Jon and welcome.

There are a couple of places to look for your information. The easiest one is to ask your dealer. Some may not be thrilled by this but will help a good customer. Another choice is "Toyota Information services". This is an official Toyota site covering every technical detail on all models of Toyota, Lexus , and Scion. Log on to TIS.com and register. 2 days of access is $15.00.

Let us know how things turned out.

Paul

[Blamb330]

I've gone done a slow road of starting to update a few components for my 2005 330 Non-ML unit (8 Speakers)

The front door speakers were beginning to rattle so I suspect rotting on the 20 years old speakers.

The RX Amp is 8 channel as best I can tell (2 A-pillar, 2 Dash, 2 Front Doors, 2 Rear Doors) it's a 2-ohm amp which matches the factory speaker ratings.


I'm about to replace some (not all) of the speakers as a first attempt to address terrible rattling sounds
My investigation so far says speakers are all 2-ohm

(2) Front Dash mid/high || (replacing with Kenwood Excelon KFC-X2C 2-3/4" mids at 4-ohms) $80
(2) Front Door 6x9 bass only (not sure what the cut-off is for these but everything I've found suggest they are bass only on the front doors -- using 2-way speakers might not do much good here) replacing with PowerBass 6x9 OE Replacement at 2-ohms (2-way) OE692-T $85

Anyway it's not complete replacement and I'm considering replacing the A-pillar tweeters too perhaps with the most basic $30 tweeters I can find.

My biggest concern is the 4-ohm mids replacement(and possible tweeters) as factory amp expects 2-ohms, so do I lose a ton of volume on the dash speakers due to increased impedance --- maybe I will be able to adjust enough with just EQ modifications.  I don't need super loud.  We'll see.

(Already replaced head unit Sony XAV-AX8000 wired CarPlay) but not interested in full stereo amp replacement. 

220,000 and I am hoping it's good for a good while longer.