Technical data sheet

A21-M

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PSI Audio A21-M s3 / typical characteristics subject to change without prior notice / © Relec SA.

A21-M

info@psiaudio.swiss
www.psiaudio.swiss

SWISS MADE BY RELEC SA, 1400 YVERDON-LES-BAINSPSI Audio Original Technology

POWER

CPR
AOI
PSC
INPUT

LEVEL

1=Gnd
2=Hot
3=ColdCPRPSI Audio Hand Made
Neodymium Tweeter

HP

Compensated Phase Response system
Adaptive Output Impedance system
Phantom Standby Control

ROLL OFFHP

LP

AOI

POWER

GLIMITERLP

AOIPSC

TEMP. SENSINTEGRATOR

Hi. ± 45V

115/230VLow ± 18V

SUM

SUM
POWER
LIMIT

RECT.

STANDBY

Potential peak power
280+55
RMS power
60+10
Input impedanceSym 10 kΩ
Input sensitivity
0.775
Input overload
24
Continuous max SPL@1 m
106
Short term max. SPL@1m
110
Peak max. SPL@1m
121
Background noise @1m
7Signal to noise ratio (S/N)
98
Mechanical noise (i.e. transformer)-5
Bandwidth at -6dB
38-23'000
SPL tolerances±2.0
Phase tolerances± 45º (300 Hz – 20 kHz)Dispersion (H x V)
80 x 40
Directivity factor
SEE GRAPH
Acoustic power
SEE GRAPHDistortion THD
SEE GRAPH
System2Crossover frequency
2'200Box material
MDF
Woofer ext. diam.
240WW
ΩVrms
VppdB
dB
dB
dBA
dBAdBA
HzdBdegdeg

MAINS

ON/OFFFUSE

TRANSF.

ways
Hzmm

REG.

SUM

Woofer ext. diam.
W. diaphragm diam.
W. diaphragm diam.
Tweeter ext. dim.
Tweeter ext. dim.
T. diaphragm diam.
T. diaphragm diam.
Dimensions W x H x D
Dimensions W x H x D
Net weight
Net weight
Input connector
Input connections
Mains voltage
Mains max DC offset
Standby consumption
Quiescent consumption
Max continuous power
RMS continuous consumption
Max relative humidity
External temperature range
Warranty

Measurement environment:- Large anechoic room, temperature 23±2°C, humidity 50±20%- Typical acoustical measurements, tolerances ±0.5 dB averaging 1/6 Octave

PSI Audio A21-M s3 / typical characteristics subject to change without prior notice / © RELEC SA.

9.4
172
6.8
100
3.5
27
1.1
250 x 400 x 300
9.9 x 15.8 x 11.9
13.2
29.1

inmm
inmm
inmm
inmm
inkglbs

1 x XLR F / 3P
1=GND, 2=(+), 3=(-)
115 / 230(50-60Hz)
0.2
1.2
6150
9070
5-355 (+1)

V, ±10 %VWWWW%°Cyears

A21-M

info@psiaudio.swiss
www.psiaudio.swiss

SWISS MADE BY RELEC SA, 1400 YVERDON-LES-BAINS[dBSPL]100

Frequency Response90

SPL@ (-10dBu ; 1m)
SPL with -10dB Roll Off
Acoustic Power
Resolution:
Smoothing:8070

1/48 Octave
1/6 Octave

60
20

50

100

200

500

1k

2k

5k

10k

20k

[Hz]

[dB]
20[%]
1030

340

1500.3

Total Harmonic Distortion
THD@ (-10dBu ; 1m)

Resolution:
Smoothing:

1/48 Octave
1/6 Octave

60
2050

100200500

1k2k5k10k

0.120k1k2k5k10k20k

[Hz]

[Deg]

540

Acoustic Phase360

Acoustic Phase
Delay:
Resolution:
Smoothing:1800.382 [ms]1/48 Octave
1/6 Octave

01802050

100200500
[Hz]

[dB]

130

Max Continuous SPL
120

Max Continuous SPL @ 1m

11 0100

k16kk5101238k

5k6k

4k

5152k

3k

62k

1k006380

1k050

25040

1k052531001620051280

105063.540

312590

[Hz]
[DI]

[Q]

10108Directivity Index

856Directivity Index

3422k16kk510128k

36k5k4k5152k3k62k01k06380

1k050

25040

1k002050163151225080

1050

634031.51250

1/36 Octave
1/3 Octave

Vertical Directivity

Frequency resolution:
Smoothing:

1/36 Octave
1/3 Octave

Left8060

6409201215Angle [°]03-60

21240-20-40

18-80
Right
100

0Top80360

6409201215182124Angle [°]Frequency resolution:
Smoothing:

Relative Pressure [dB]

Horizontal Directivity

Relative Pressure [dB][Hz]

2005001k2005001k[Hz]

2k5k10k20k

2k5k10k20k0-20-40-60-80
Bottom100[Hz]

PSI Audio A21-M s3 / typical characteristics subject to change without prior notice / © RELEC SA.

A21-M

info@psiaudio.swiss
www.psiaudio.swiss

SWISS MADE BY RELEC SA, 1400 YVERDON-LES-BAINSMounting

All dimensions are in mm

Side view

Bottom view

Refer to user manual for information about installation and safety instructions

Acoustical axis

Front view

Recommended listening distance
1'000 - 3'000

PSI Audio A21-M s3 / typical characteristics subject to change without prior notice / © RELEC SA.