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Discussion Starter · #1 ·
Hey everyone,

I have a '16 WRX Premium w/o HK system. Initially the radio reception was "okay" meaning it wasn't as good at holding HD channels as my '15 Legacy but it held it sometimes. I installed a Kenwood DDX9902s and I used the Metra 40-LX11 adapter for the antenna. I noticed with the new head unit, radio reception was worse than it was before. In my attempt to figure this out, I separated the connection between the antenna turn on wire from my head unit and blue wire on the Metra adapter. As I suspected, absolutely no difference. Upon further inspection, the factory antenna connector does NOT have a female slot for the male pin in the Metra adapter to connect to.

This leads me to wonder, where is the antenna turn on wire in this car and why is it not connected to the factory antenna connection?

Factory Connection

IMG_3090.jpg IMG_3091.jpg

Metra 40-LX11 adapter

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Discussion Starter · #2 ·
Figured it out. It's late and I'm tired. I was connecting the Metra adapter wire to the head unit wire, wondering why nothing was happening. The blue wire on the Metra adapter isn't even used. The antenna wire from the head unit needs to connect to the antenna turn on wire on the 10 pin connector. Soon as I connected this, every channel came in as HD.
 

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That was an interesting one. Had suggestions. But glad you figured it out.
 

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Discussion Starter · #5 · (Edited)
Indeed interesting.

I don't have a 20pin adapter but yes, it's the same wire on my 10 pin adapter. I have a 10 + 6 pin breakaway harness and the 28pin extender. With an aftermarket unit I haven't even used the 6 pin extender surprisingly. My breakaway harness is honestly meant for aftermarket audio while retaining the OEM head unit but can be easily repurposed. When I connected this directly to the head unit's antenna amp wire, it was a complete night and day difference.
 

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ah nice.

On the DDX have you had issues with the clock not staying in sync after you turn off the car?

I've given up on the clock on my radio. It doesnt keep the time.
 

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Discussion Starter · #9 ·
Honestly I've never set it. Whenever I'm in my car I'm 8/10 using Car Play which has the phone's time on the screen. If I'm listening to the radio, I don't look at the head unit for the time since the screen next to the HVAC screen shows it.
 
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