Audiovector Trapeze RI Floor-standing Loudspeaker
 
he Trapeze Ri is a three-way design, which is clear even with the removable grilles in place as they are quite see-through. What can’t be seen is a fourth drive unit that is an integral part of the speaker’s unique bass section, which is an implementation of the isobaric loading principle, invented by RCA engineer Harry Olson in 1954. A patented variation of Olson’s design was introduced in 1973 by Linn in its Isobarik DMS loudspeaker. In Linn’s configuration, which was adopted by other isobaric-speaker makers, two identical woofers were mounted coaxially in tandem, cone to magnet, with the front of the rear driver and the back of the front driver opening into a shared sealed chamber. The back of the rear driver opened to a second sealed chamber. The two drivers were in phase, so the pressure within the shared chamber remained essentially constant (isobaric means having constant pressure). Acoustically, the isobarically coupled drivers perform as one of the two would in a cabinet twice the size.
 
 
Uniquely angled cabinetry to eliminate internal standing waves.
Combination of a 12-inch woofer on the front baffle and an 8-inch interior mounted woofer in an Isobaric system ported to the rear for deep bass.
AMT (Air Motion Tweeter) based on the original design of Dr. Oscar Heil.
5-inch high-speed midrange.
Linear Phase – 6 dB per octave crossover.
Base comprised of a two-layer aluminum plinth with built-in decoupling via carbon steel ball bearings and Audiovector spikes.
Rear port for the AMT to expand soundstage.
Damping factor adjustment.
Felt front baffle for diffraction control.
Cryogenically treated tin flash/copper capacitors.
Air-cooled metal housed resistors for bass and midrange.
Four finishes including Silk White, Italian Walnut, Black Ash, and Nordic Oak