When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
Stock Sony Amplifier Lost Front Left Channel - Need to Replace/Upgrade
I need the Forum's help/suggestions. I have a 2009 Ford F150 FX4 with the Sony Nav system, but the stock Sony amp (Ford part number 9L3T-18B849-AK, Sony Model Number ML318B849AA) seems to have a blown front left channel. I've swapped speakers and the issue stays isolated to the front left door, meaning the front left speaker works when installed in other doors, but whatever speaker I install in the front left door fails to work. I had a shop check the wiring, which they said all looks fine.
My thought is I should just change out the stock amp, but I can't seem to find an exact match online. There are several amps being wrecked out of vehicles that nearly match the part number and look like they have the correct plugs, but the model/part numbers don't match exactly. Now I'm trying to read through the forum here to find an easy way to replace the amp with something aftermarket, or if I should just buy a used amp and see if it works, but I'd rather not throw away $60(+/-). I'm not a huge audiophile, so the stock performance was adequate. I just want all speakers working.
The Sony amp does more than just amplify. It has the speaker crossovers built in and converts the digital signal from the HU to an analog signal for the speakers. You could check with the dealer.
The Sony amp does more than just amplify. It has the speaker crossovers built in and converts the digital signal from the HU to an analog signal for the speakers. You could check with the dealer.
Hi Wyo11Scab, thanks for your input. I'm not fond of the local dealer by any stretch of the imagination, so avoiding them at all costs.
Hi Wyo11Scab, thanks for your input. I'm not fond of the local dealer by any stretch of the imagination, so avoiding them at all costs.
Unless you are able to find a used amp with the same part number then your only option would be to contact the dealer and see if another part will work
Did you ever resolve this issue? I'm having a similar problem in my 2011 F-150 (Sony system w/o Nav). I've already purchased 4 new speakers and the issue is isolated at the rear driver-side door. I'm considering buying a used stock amplifier off eBay and swapping it in to see if that improves anything, but wanted to poke around the forums more first. Thanks!
Did you ever resolve this issue? I'm having a similar problem in my 2011 F-150 (Sony system w/o Nav). I've already purchased 4 new speakers and the issue is isolated at the rear driver-side door. I'm considering buying a used stock amplifier off eBay and swapping it in to see if that improves anything, but wanted to poke around the forums more first. Thanks!
Did you check the wires in the door jam, they have been known to break.
Also if you used the metra speaker adapters, those have been known to cause these type of issues as well.
05-21-2017, 04:04 PM
Stock Sony Amplifier Lost Front Left Channel - Need to Replace/Upgrade
