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Metra WM-LOCKN Universal Line Output Converter for adding aftermarket amplifer to OEM radio -black

Key item features

  • Adjustable Converter: New Metra WM-LOCKN Adjustable Line Output Converter for adding aftermarket amplifiers to OEM radios.
  • 2 Channel Input: Features a 2 channel input for versatile connectivity options.
  • High Power Handling: Supports up to 55-Watt maximum input for powerful performance.
  • Gain Adjustment: Includes gain adjustment for RCA cables and a stereo level adjustment knob for precise control.
  • Signal Sense: Provides signal sense turn-on, automatically sending a remote signal to the amplifier when the vehicle turns on.
  • Easy Installation: Designed for easy installation with a smaller, sleek design that is easy to mount.
  • Volume Control: Comes with an adjustable stereo knob for convenient volume control without accessing the stereo unit.
  • Short Protection: Built-in short circuit protection ensures safe and reliable operation when adding an aftermarket amplifier to a factory radio.
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Current price is $25.28
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Customer ratings & reviews

4.2 out of 5 stars
stars98 ratings36 reviews
How item rating is calculated
1.3
3.3
  1. 5 stars69% (68)
  2. 4 stars7% (7)
  3. 3 stars6% (6)
  4. 2 stars3% (3)
  5. 1 star14% (14)

Reviews summary

Neutral

  • : Can be straightforward, but may require effort and troubleshooting.

Cons

  • : Produces low-quality signal that may not work with subwoofers.
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Showing 1-3 of 36 reviews

Jun 18, 2026
Shawn
5 out of 5 stars review

Verified Purchase

Works great for just wanting to add an aftermarket subwoofer to an OEM stereo system setup . Just make sure you tie into the speaker output wires in the right spot and be gentle with the gain adjustments on RCA outputs.

Helpful?2CVRAI9CDHIL172649875
Dec 12, 2024
john
5 out of 5 stars review

Verified Purchase

run auto subwoofer from your rear

You do not have to be a technician to install. Connects rear deck speaker wires to power stand alone subwoofer and enabling auto shut on and off of amp on subwoofer, the latter powered by ground cable and power cable hooked up to batter terminal directly.

Incentivized Review
Helpful?2CVRAI9CDHIL172649875
May 25, 2025
Damian
5 out of 5 stars review

Verified Purchase

love the convenience of ordering something so i didnt have to leave with stereo apart n i can hookup amp now with ease with this adapter.

Helpful?2CVRAI9CDHIL172649875