Plug & Play Signal Adapter for Aftermarket Amplifier 14+ SKU: WH-14-PNP-F



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This is the simplest and best way to get a signal from your factory Harley radio when installing an aftermarket amplifier.

Product Description

Radio Flash & DSP
It is highly recommended that you either have your radio flashed by an independent bike shop with the proper equipment or rent a flash tool and flash your bike yourself. You can find our flash rental tools here. 

Technoresearch has a number of flashes that its software offers. These flashes are all supplied to them by a number of aftermarket amplifier manufactures, but we recommend using the one from Rockford Fosgate. This particular flash has a friendly EQ curve for aftermarket amplifiers and speakers. It also enables rear speakers, front-to-back fader (not all flashes do), bass and treble controls, and speed-dependent volume feature. 

Additional Speaker Pod Connectors
This kit also comes with connectors that mate to your fairing speaker pods. This way you can connect your aftermarket amplifier directly into your fairing speaker pods without any cutting or splicing into the bike's wire harnesses. We always recommend using speaker pod connectors along with our signal adapters.

Front or Rear Signal
This kit comes ready to plug directly into the front signal harness of the factory radio on all Harley touring bikes. Optionally we offer a rear signal version that plugs in and converts this adapter to fit the 4 pin connector that Harley uses for the rear channels on 4 channel bikes. 

Note: If you are purchasing this item for rear signal only you will not need the optional speaker pod connectors and they will not be in your kit. Speaker pod connectors are only used for front fairing applications. Rear kits do however come with an adapter that makes them compatible with the rear radio outputs. 

Rear Channel Tech Info
All two-channel bikes (90% of all bikes sold) have a rear speaker output connector located behind the factory radio. This plug however is dead (no signal) unless the radio is programmed for 4 channel output using a flash tool. 


  • Compatible Year - 2014+
  • Compatible Model - Street Glide, Road Glide, Electra Glide. Will not work with Ultra models. Ultra models require our radio T harness to aquire rear radio signal. You can find that harness here.
  • Location - Fairing
  • Additional Adapter Required - No 
  • Modification Required - No
  • Plug & Play - Yes
  • Works with Electric Lid Locks - N/A

Note: This unit is intended to be used with aftermarket amplifiers only. It Will Not work with the factory amplifier(s). This is not a high to low converter. This unit outputs a speaker-level audio signal with an RCA-type connector. Most all modern amplifiers for use with motorcycle applications are designed to accept speaker-level input at the RCAs. Be sure to verify that your amplifier has this feature. If not, a high to low-level adapter must be used in conjunction with this part. Call if you have any questions about this. We can verify for you that your amplifier does or does not have speaker-level inputs if you are not sure. 

This kit connects to the front signal harness of the factory Harley radio with plug & play connectors and outputs to your aftermarket amplifier or DSP and includes an integrated circuit that balances the factory Harley radio outputs. This results in a much wider volume range without the distortion that you would otherwise end up with. 


5 years


Road Glide

Street Glide

What's Included

(1) Plug & Play Signal Adapter