ACTIVE LOUDSPEAKER

PSI Audio A21-M

Name: PSI Audio A21-M
Brand: PSI Audio

A21-M in Studio Red. Official PSI Audio photograph.

A two-way active speaker for a stand-mounted music system. Its larger bass/mid driver gives it more bass extension and output capacity than A17-M, with a cabinet sized for listening beyond the desk.

FromA$12,598 per pair

Studio Red. Including GST.A$6,299 each.View black and white pricing

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IS IT RIGHT FOR YOUR SYSTEM?

Why consider A21-M?

Consider A21-M for a stand-mounted system where A17-M feels too small but you prefer a two-way speaker. Allow for its 300 mm cabinet depth and the cables behind it.

Amplification matched to the drivers

The crossover and amplifiers are designed for the drivers in each cabinet. The signal path is analogue, without DSP, and the built-in amplification removes the need for a separate power amplifier.

Measured individually in Switzerland

PSI Audio builds, measures and calibrates each speaker in Switzerland against its reference response. This sets up the speaker before it leaves the factory; placement and the room shape what you hear at home.

A21-M internal amplifier electronics. Official PSI Audio photograph.

How does it compare?

A21-M sits between the compact A17-M and three-way A23-M. Choose it for more bass and output than A17-M; compare A23-M if you also want a separate driver for the midrange.

Prices shown are for Studio Red and include GST.
Compare	A21-M	A17-M	A23-M
Studio Red price	A$12,598 per pair	A$7,798 per pair	A$19,398 per pair
Design	Two-way active	Two-way active	Three-way active
Bandwidth at −6 dB	38 Hz to 23 kHz	44 Hz to 23 kHz	34 Hz to 23 kHz
Each cabinet: W × H × D	250 × 400 × 300 mm	200 × 320 × 230 mm	280 × 500 × 340 mm
Weight per cabinet	12.8 kg	7.4 kg	18 kg
Manufacturer distance guide	1 to 3 m	0.7 to 2 m	1.2 to 3.5 m

Allow extra space for cables, ventilation and stands. Listening distances are PSI’s setup guide.

Connections and placement

DAC / preamplifierAnalogue output · volume controlled

Left output → XLRLeft speakerMains power to each cabinet

Right output → XLRRight speakerMains power to each cabinet

Basic signal path. Volume is controlled before the signal reaches the speakers.

Connect the left and right variable analogue outputs of your DAC or preamplifier to the speakers’ XLR inputs. A fixed-output DAC needs a preamplifier or volume controller between it and the speakers.
The XLR input takes a line-level signal. Never connect a power amplifier’s speaker output to it. Start playback at low volume after connecting the system.
A subwoofer needs a line-level feed that follows the main system volume. Set its level and crossover alongside the main speakers so they blend through the bass.

Where to place it

Allow for a 300 mm deep cabinet, cables behind it and 12.8 kg on each stand. Each speaker needs a signal cable and power lead, with airflow around the rear amplifier panel.

Each cabinet needs mains power and ventilation around its amplifier panel. The manual covers voltage selection and installation clearances. Use the distance guide above as a starting point for your listening setup.

A21-M installation example from PSI Audio. Other equipment and furnishings shown are not supplied with the speaker.

See the three common home-system connections →

COLOURS & PRICES

Choose your finish.

The starting price is for Studio Red. Compare all three finishes below.

Australian retail prices. GST Included.
Finish	Per pair	Each
Studio Red Product code A21MSR	A$12,598	A$6,299
Metal Black Product code A21MSB	A$12,998	A$6,499
Pure White Product code A21MSW	A$12,998	A$6,499

A pair contains two speakers, priced at twice the single-unit price.

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A21-M in Metal Black. Official PSI Audio photograph.

Specifications

System: Two-way active
Bandwidth at −6 dB: 38 Hz to 23 kHz
Typical listening distance: 1 to 3 m
Peak maximum SPL at 1 m: 121 dB, manufacturer product page
Amplifier peak power (manufacturer): 280 + 45 W
Dimensions (W × H × D): 250 × 400 × 300 mm
Net weight: 12.8 kg
Inputs: 1 × balanced XLR, female 3-pin

SPL is the manufacturer’s peak figure at 1 m. Amplifier power is also a peak rating; neither figure describes continuous output.

Technical documents

Common questions

Can I keep my current amplifier or source?

Yes, if it provides an analogue output with volume control. A DAC with variable XLR outputs can connect directly; a fixed-output DAC needs a preamplifier. An integrated amplifier with a variable pre-out can also serve as the front end. For RCA outputs, use a cable wired for the PSI input.

Do I also need a subwoofer?

You can start with the main speakers on their own. Add a subwoofer if you want more of the lowest bass in your music or films. Its position, volume and crossover need to work with the main speakers.

What warranty does PSI Audio provide?

PSI Audio provides a five-year warranty, with an extra year when you register your product.

Compare similar models

A23-M →
A23-M suits a main music system where a dedicated midrange matters but cabinet size still counts. Familiar vocals and layered recordings are useful listening material when comparing it with A21-M or A25-M.
A17-M →
A17-M fits a close listening setup on a roomy desk or stands. PSI’s distance guide is 0.7 to 2 m, making it a useful option between the small A14-M and larger A21-M.

Explore system expansion

Sub A125-M →
Add deeper bass to the music system.

AUSTRALIAN ENQUIRY & SUPPORT

Enquire about A21-M

Tell us about your source, listening distance and the model you are considering. We can help you work out how it would fit your system. You can also ask about ordering, lead times and audition options.

PSI AudioA21-M

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How to connect active speakers at home Speakers, subwoofers and AVAA explained