About the Metra 72-8109 Speaker Wiring Adapters
What's in the box:
Other info:
- MFR # 72-8109
- Item # 120728109
- California customers: Please click here for your Proposition 65 WARNING.
More details on the Metra 72-8109 Speaker Wiring Adapters

Product Research
Features
Metra Speaker Harness: Metra speaker harnesses prevent having to splice into your vehicle's factory wiring/speaker plugs when replacing the factory speakers with aftermarket car speakers. The Metra speaker harness features two female quick-slide connectors on one end to attach directly to your new aftermarket speakers and a proprietary Molex connector on the other end that connects to your vehicle's factory speaker plug.
Quick-Slide Connectors: The Metra speaker harness is equipped with a large (positive) and small (negative) female quick-slide terminal. These quick-slide terminals fit directly onto most aftermarket car stereo speaker terminals (slight crimping may be required). In rare cases that the quick-slide terminals do not fit your car speaker terminals, you will need to solder the Metra speaker harness to your aftermarket speaker's terminals or replace the quick-slide connectors on the Metra speaker harness with the correct size terminal.
Note: Installation tools, hardware, and accessories are not included and sold separately. Please see the Accessories tab for recommendations and availability.
Quick-Slide Terminal Measurements: The positive female quick-slide terminal measures 0.205" (inner width), while the negative female quick-slide terminal measures 0.110" (inner width).
Wire Code Chart: Two identical Metra speaker harnesses are included.
Wire Color | Function |
---|---|
White | Positive |
Black | Negative |
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Customer Q&A
4 questions already asked
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These worked perfectly with my 2025 Lexus NX350. If you're looking to upgrade your dash speakers don't hesitate to use these!
John from Conroe, TX