Harley A2B Audio Interfaces: ZEN-H & ZEN-H PRO

Audio integration interfaces for Harley-Davidson® Touring bikes and trikes on Skyline OS, including the NAV-TV ZEN-H. These bikes send audio over A2B, a digital signal an aftermarket amplifier can't read directly, so the interface converts it to an analogue signal while keeping the factory screen, Apple CarPlay and handlebar controls. The right interface and harness depend on your model year and audio package, so check each listing against your bike.

On Skyline OS, the interface comes before the amplifier.From 2024 the Street Glide and Road Glide send audio over A2B, a digital signal an aftermarket amplifier can't read, and the 2026 trikes are the same. Tell us your model and year and we'll show the interface, harness and amplifier that work together.Build your system →

Which A2B interface does your Harley need?

The NAV-TV ZEN-H and ZEN-H PRO both convert the factory A2B signal into analogue preamp outputs an aftermarket amplifier can use. The difference is where the tuning happens: the ZEN-H suits a build where processing sits elsewhere, in a DSP amplifier or a separate processor, while the ZEN-H PRO has onboard DSP for crossover, equalisation, level and time alignment. Fitment follows the model and factory audio package, not the model year alone.

FAQ

Why does a newer Harley need an A2B interface?

Skyline OS carries audio through the factory system on an A2B digital network. An aftermarket amplifier cannot accept that signal directly, so a compatible interface converts it into analogue preamp outputs the amplifier can use. Bikes on the earlier Boom! Box platform provide an analogue speaker-level signal and do not need one.

ZEN-H or ZEN-H PRO?

Choose the ZEN-H when the system already has processing, such as a DSP amplifier or a standalone processor. Choose the ZEN-H PRO when you want the tuning built into the interface, with onboard crossover, equalisation, level and time-alignment control. Both do the same signal conversion.

Does it keep Apple CarPlay and factory navigation?

Yes. The interface works with the factory Skyline OS head unit rather than replacing it, so supported factory functions stay available, including Apple CarPlay and factory navigation where fitted.

Does every 2024 and newer Touring model need one?

Not automatically. Fitment depends on the model and the factory audio configuration, and ZEN-H currently supports a listed set of applications. Check the fitment on each product, or send us your year, model and current audio package and we will confirm it.

What about a Bluetooth receiver?

That is a different job. A Bluetooth receiver adds a standalone wireless source to an amplified system. It does not integrate the factory head unit and is not a substitute for an A2B interface on a Skyline OS bike.

Which amplifier pairs with an A2B interface?

Once the signal is analogue, it can feed a compatible motorcycle amplifier or DSP amplifier. See the 2024 and newer Street Glide amplifiers, or the complete systems for 2024+ Touring, where the interface is already included in the kit.