REFLECTOR AUDIO — RIGA, LATVIA

Four woofers around a horn.

Square Two is a coaxial point source. Four 5-inch woofers vent through bandpass chambers in the face of a central horn, so a 320 mm enclosure radiates as a single source rather than a box with drivers in it.

Square Two — front, on black
SQUARE TWO — FRONT
40 Hz – 26 kHz
bandwidth (−6 dB)
112 dB
max SPL (3% THD)
0.35 dB
pair matching
02

Two instruments

Square Two

Square Two

SQT

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.

SQUARE TWO →
Q1818 open-baffle array

Q1818

REFERENCE

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.

Q1818
Square Two — rear panel
SQT — REAR PANEL
03

Built in Riga. Tuned in your room.
SQT — COMPACT POWERED TWO-WAY

Square Two

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.

SPECIFICATIONS
ConfigurationPowered two-way, coaxial horn — bass-reflex, convertible to sealed
Frequency range40 Hz – 26 kHz (−6 dB)
Crossover1 kHz, phase-linear from ~200 Hz (IIR, no FIR)
Drivers4 × 5″ Eighteen Sound woofers · 1.4″ FaitalPRO compression driver
Directivity120° > 600 Hz · 90° > 1 kHz · 50° > 2 kHz — horizontal = vertical
Max SPL112 dB (3% THD) · 118 dB peak
AmplificationHypex Ncore 2 × 125 W + 100 W · Sigma DSP
Pair matching0.35 dB
Enclosure320 × 345 × 325 mm · 19.4 kg
Bass extensionSQB system, optional — three-way, to 16 Hz · latency < 5 ms
Square Two — coaxial horn with four bandpass vents
SQUARE TWO — COAXIAL HORN · FOUR BANDPASS VENTS
On-axis frequency response plot
ON-AXIS FREQUENCY RESPONSE — 40 Hz – 26 kHz (−6 dB)
Directivity polar diagram
DIRECTIVITY — −6 dB BEAMWIDTH AT 600 Hz / 1 kHz / 2 kHz
Horn face detail
HORN FACE — BANDPASS VENT AT THE MOUTH
Hypex Ncore amplifier module
AMPLIFICATION — HYPEX NCORE · 2 × 125 W + 100 W · SIGMA DSP
FIVE PRINCIPLES

Technology

01

Coaxial point source

Four low-frequency drivers vent around a central horn. One acoustic origin instead of two; the image holds as you move.

Coaxial point source diagram
02

Horn loading

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.

Horn loading diagram
03

Phase-linear crossover

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.

Phase-linear crossover diagram
04

Controlled directivity

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.

Controlled directivity diagram
05

Convertible loading

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.

Convertible loading diagram

We are not voicing a loudspeaker. We are handing back the recording with its temporal and spatial information intact.