Same genuine drivers, cross over and internal volume as the original Hartley Reference Monitor. The  Re- design by Tri-Art Audio involves the port orientation and the movement of one of the drivers up above the tweeter. The Reference speakers are now on short stands instead of being floor-standing. These changes really tighten up the sound, producing a faster and more detailed response. The driver positioning and port adjustments help the overall acoustic focus, giving it more precision.
A significantdesign change is with the cabinet. The hexagonal shape of the cabinet with a narrow front to an increased back amplifies the play of external energy acting like a reversed folded horn making for a high resolution and very fast detailed sound.
- The waffled edges at the back of the speaker help guide the sound out smoothly, like turbulence at the end of an aircraft wing. This keeps the sound clean and clear, without unwanted reflections.

Acoustically treated sound absorber.
- A blend of different density sheep and hemp wool, sourced locally, is used for sound dampening.
- The cabinet is made from  high-quality, solid 3 ply bamboo, cured and CNC fabricated in-house. Bamboo is selected for its density, and resonance control which lends a natural harmonic contribution to the speaker sound. Finished with a hand rubbed oil application.