Square Two

Active coaxial horn monitor

A single
acoustic axis

The entire front face is a horn. Four 5″ woofers vent through its flare, concentric with the 1.4″ compression driver at the throat. One source, measured as one source.

Square Two — $8,900

Book a listening

Bandwidth

40 Hz – 26 kHz

Ripple

± 1.3 dB

Peak

118 dB @ 1 m

Phase

Linear ≥ 200 Hz

Mass

19.4 kg

01 — Principle

All technology →

Most monitors ask the room to fuse two drivers

At close range that fails. The paths arrive separately and the image smears. Square Two removes the problem geometrically: the woofers sit on a sub-baffle behind the horn and vent through four apertures cut into its flare, arranged concentrically around the compression driver.

Because the baffle is square and the array symmetrical, horizontal and vertical directivity are identical — one isobar plot describes both planes. Crossover at 1 kHz. Linear phase from 200 Hz is produced with bell, shelf and all-pass sections rather than FIR, fifteen biquads per path.

02 — The range

Drag / scroll →

Square Two

$8,900

Nearfield to midfield and mastering. 320 mm cube, 19.4 kg, 118 dB peak.

Bespoke Series

POA

Large-format mains built to a room. Multiple 15″ woofers around a single horn.

Stands & mounts

from $420

Decoupled console pads, floor columns and yoke brackets for the 320 mm footprint.

Published,
not claimed

Independent laboratory measurement, class 1 anechoic chamber, 4 m, G.R.A.S. 46BF at 96 kHz / 24 bit. Not a summary of the results — the results.

20501002005001k2k5k10k20k40k

SumLFHF

Ripple

2.6 dB

Max SPL

112 dB

EIA-426B

105 / 118

Beam angle

64°

Noise floor

27 dBA

Full specifications and documentation →

03 — Rooms

All installations →

SEStudio KärnhusetBespoke 2 × 15″ soffit pairStockholm

USFever RecordingControl room B, Square Two nearfieldLos Angeles

DEHalle 7 PostAtmos stage, twelve-channel arrayBerlin

04 — Listen

Hear it in
your room

Demonstration pairs travel. Tell us the room, the console position and what you are working on. We will arrange a listening at the factory in Rīga, at a partner studio, or in your own control room.

Request a demo →

Find a dealer

Documentation

Square Two — datasheetPDF 1.4 MB

Laboratory reportPDF 3.2 MB

Mechanical drawings — DWG / STEPZIP 12 MB

        Reflector Audio · Rīga, Latviainfo@reflectoraudiousa.com · +1 805 300 8776© 2025
      

Four woofers behind one horn

Low frequency

4 × 5″ Eighteen Sound

Recessed sub-baffle, venting through four apertures in the horn flare. Reflex ports on the underside; the base plate lifts the cabinet clear of the surface.

High frequency

1.4″ Faital

Compression driver on the common axis at the horn throat. Crossover at 1 kHz.

Electronics

Hypex Ncore

2 × 125 W on the woofers, 100 W on the horn, in an isolated inner enclosure that keeps the boards clear of cabinet vibration.

Product 02 — Bespoke

Built to
a room

A Bespoke system starts with the room, not the catalogue. We measure the space, model the boundary conditions, then build the enclosure, the horn and the crossover around the result. Throat colour is chosen at the same time as the filter set.

The process

01

Survey

We measure the room, the listening position and the boundaries that will load the low end.

02

Model

Horn flare, chamber volume and driver count are chosen against the measured room, not a datasheet.

03

Build

Cabinets and horns are made in Rīga. Finish, throat colour and hardware are specified with you.

04

Align

Installed and aligned in place, with the final filter set measured and documented for the room.

Start a brief

Tell us the room dimensions, the work you do in it and the level you need. We will come back with a proposal, a projected response and a price.

Open the brief form →

Throat finishes

High-gloss polyester over machined MDF. Any RAL reference can be matched to order.

A square baffle gives one dispersion pattern, not two

Horizontal and vertical behaviour are identical, so a single isobar plot describes the monitor completely. Above 600 Hz the opening angle is about 120°, narrowing to 90° at 1 kHz and to roughly 50° above 2 kHz.

Narrow is neither good nor bad — it is appropriate or inappropriate to the room. Less freedom of movement at very short distances; far less reflected energy and a smaller diffuse-field contribution. Three to four metres suits Square Two best.

              600 Hz · 120°
              1 kHz · 90°
              2 kHz and above · 50°
            

Linear phase without FIR, and without the latency

Linear-phase response is usually bought with FIR filtering and paid for in latency. Square Two instead uses a combination of bell, shelf and all-pass sections — fifteen biquads per path on the Hypex platform — to hold phase linear from roughly 200 Hz upward.

The step response starts cleanly, with no precursor and an even decay. The spectrogram shows no resonant tail. For tracking and for live monitoring, the absence of FIR latency matters as much as the phase behaviour itself.

Biquads per path

Crossover

1 kHz

Linear from

200 Hz

Small woofers, high sensitivity

Four 5″ drivers should not reach 112 dB. They do here because each fires into a bandpass chamber that vents through the horn flare, raising sensitivity well above what the cone area alone would give.

Multitone measurement at an average music crest factor returns 105 dB Leq and 118 dB peak at one metre before the 10% distortion limit — figures normally associated with considerably larger cabinets.

See the measured data →

A single
acoustic axis

Most monitors ask the room to fuse two drivers

Square Two

Bespoke Series

Stands & mounts

Published,
not claimed

Hear it in
your room

Square Two

Four woofers behind one horn

Order a pair

Built to
a room

Start a brief

Why a horn,
and why square

A square baffle gives one dispersion pattern, not two

Linear phase without FIR, and without the latency

Small woofers, high sensitivity

Specifications

Rooms
we know

Specifying for
a build?

The workshop

Book a
listening

A singleacoustic axis

Most monitors ask the room to fuse two drivers

Square Two

Bespoke Series

Stands & mounts

Published,not claimed

Hear it inyour room

Square Two

Four woofers behind one horn

Order a pair

Built toa room

Start a brief

Why a horn,and why square

A square baffle gives one dispersion pattern, not two

Linear phase without FIR, and without the latency

Small woofers, high sensitivity

Specifications

Roomswe know

Specifying fora build?

The workshop

Book alistening

A single
acoustic axis

Published,
not claimed

Hear it in
your room

Built to
a room

Why a horn,
and why square

Rooms
we know

Specifying for
a build?

Book a
listening