Compact powered two-way. Coaxial horn, four 5″ woofers, 1 kHz phase-linear crossover. 320 mm enclosure, bass-reflex, convertible to sealed. Hypex Ncore amplification. Optional SQB bass system extends it to three-way, down to 16 Hz.
Impulse-corrected open-baffle reference system. Four 18-inch drivers and a compression driver in a baffleless coaxial array, with additional 18-inch subs. Approximately 10 kW of passively cooled Class D. Figure-of-eight radiation. Tuned in-room, per control room.
A coaxial point source in a 320 mm enclosure.
A central 1.4-inch compression driver sits on the horn; four 5-inch woofers vent through bandpass chambers in the horn face around it. Their acoustic centres align, so the monitor behaves as one source through the 1 kHz crossover instead of two sources arguing about where the image sits. The crossover is phase-linear from about 200 Hz, corrected with IIR filters rather than FIR.
Four low-frequency drivers vent around a central horn. One acoustic origin instead of two; the image holds as you move.
Controlled directivity and high sensitivity, so the compression driver works in a smaller, more linear part of its excursion. Horizontal and vertical dispersion are matched.
The 1 kHz crossover is corrected in the digital domain from ~200 Hz using IIR filters (bell, shelf and all-pass; no FIR), so time-domain accuracy is a design target, not a by-product of the response.
The −6 dB beamwidth narrows predictably with frequency — 120° above 600 Hz, 90° at 1 kHz, 50° above 2 kHz — so the room is excited with the same balance you hear on axis.
Bass-reflex out of the box, convertible to sealed, with an optional three-way bass system reaching 16 Hz. The monitor is matched to its room, not to a house sound.
The baffle-free, figure-of-eight story belongs to the Bespoke line (P15/E15) and the Q1818 reference system — not to Square Two, which is a bass-reflex coaxial design.