Why a dedicated transformer for each ribbon section?

When the midrange and treble ribbons share a single transformer, the two sections are coupled through the same magnetic core. Any non-ideal behaviour of that core — saturation, leakage inductance, hysteresis — affects both bands together, and the two sections cannot be independently damped or level-matched at the transformer itself.

Giving each ribbon section its own dedicated transformer delivers several concrete advantages:

• Magnetic isolation. The midrange and treble bands are decoupled at the core, so large midrange excursions cannot modulate the treble through the shared flux path.
• Independent damping. Each section's reflected impedance and Q can be optimised for its own band, rather than arriving at a compromise that suits neither.
• Linear core operation. Each transformer only handles the power and bandwidth of one section, so it stays well within its linear region — no core is asked to pass both a heavy midrange fundamental and a delicate treble simultaneously.
• Simpler crossover design. The transformer's insertion characteristics are section-specific, so the passive network that follows can be designed for one band at a time.

This is the architecture used on the Minuet, Studio, Auditorium, Aria, and Atrium — and it is a large part of why those models resolve fine detail and dynamic shading that a shared-transformer design cannot.