PSI Audio A21-M Instruction Manual

Technical data sheet
PSI Audio A21-M s3 / typical characteristics subject to change without prior notice / © Relec SA.
A21-M
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CPR
1=Gnd
2=Hot
3=Cold
115/230V Hi. ± 45V Low ± 18V
MAINS ON/OFF FUSE REG.
LIMITERLEVEL ROLL OFF HP LP
TEMP. SENS
CPR Compensated Phase Response system
A O I Adaptive Output Impedance system
PSC Phantom Standby Control
HP
LP
STANDBY SUM
SUM
INTEGRATOR
SUM
INPUT
POWER
G
AOI
LIMIT
POWER
POWER
AOI
PSC
PSI Audio A21-M s3 / typical characteristics subject to change without prior notice / © RELEC SA.
SWISS MADE BY RELEC SA, 1400 YVERDON-LES-BAINS
A21-M www.psiaudio.swiss
[e-mail]
PSI Audio Hand Made
Neodymium Tweeter
PSI Audio Original Technology
Potential peak power 280+55 W
RMS power 60+10 W
Input impedance Sym 10 kΩ Ω
Input sensitivity 0.775 Vrms
Input overload 24 Vpp
Continuous max SPL@1 m 106 dB
Short term max. SPL@1m 110 dB
Peak max. SPL@1m 121 dB
Background noise @1m 7dBA
Signal to noise ratio (S/N) 98 dBA
Mechanical noise (i.e. transformer) -5 dBA
Bandwidth at -6dB 38-23'000 Hz
SPL tolerances ±2.0 dB
Phase tolerances ± 45º (300 Hz – 20 kHz) deg
Dispersion (H x V) 80 x 40 deg
Directivity factor SEE GRAPH
Acoustic power SEE GRAPH
Distortion THD SEE GRAPH
System 2ways
Crossover frequency 2'200 Hz
Box material MDF
Woofer ext. diam. 240 mm
Woofer ext. diam. 9.4 in
W. diaphragm diam. 172 mm
W. diaphragm diam. 6.8 in
Tweeter ext. dim. 100 mm
Tweeter ext. dim. 3.5 in
T. diaphragm diam. 27 mm
T. diaphragm diam. 1.1 in
Dimensions W x H x D 250 x 400 x 300 mm
Dimensions W x H x D 9.9 x 15.8 x 11.9 in
Net weight 13.2 kg
Net weight 29.1 lbs
Input connector 1 x XLR F / 3P
Input connections 1=GND, 2=(+), 3=(-)
Mains voltage 115 / 230(50-60Hz) V, ±10 %
Mains max DC offset 0.2 V
Standby consumption 1.2 W
Quiescent consumption 6W
Max continuous power 150 W
RMS continuous consumption 90 W
Max relative humidity 70 %
External temperature range 5-35 °C
Warranty 5 (+1) years
TRANSF. RECT.
- Large anechoic room, temperature 23±2°C, humidity 50±20%
- Typical acoustical measurements, tolerances ±0.5 dB averaging 1/6 Octave
Measurement environment:

PSI Audio A21-M s3 / typical characteristics subject to change without prior notice / © RELEC SA.
SWISS MADE BY RELEC SA, 1400 YVERDON-LES-BAINS
A21-M www.psiaudio.swiss
[e-mail]
Frequency Response
SPL@ (-10dBu ; 1m)
SPL with -10dB Roll Off
Acoustic Power
Smoothing: 1/6 Octave
Resolution: 1/48 Octave
Horizontal Directivity
Smoothing: 1/3 Octave
Frequency resolution: 1/36 Octave
24
21
18
15
12
9
6
3
0
Relative Pressure [dB]
Total Harmonic Distortion
THD@ (-10dBu ; 1m)
Smoothing: 1/6 Octave
Resolution: 1/48 Octave
Acoustic Phase
Smoothing: 1/6 Octave
Resolution: 1/48 Octave
Delay: 0.382 [ms]
Acoustic Phase
Max Continuous SPL
Max Continuous SPL @ 1m
Directivity Index
Directivity Index
Vertical Directivity
Smoothing: 1/3 Octave
Frequency resolution: 1/36 Octave
24
21
18
15
12
9
6
3
0
Relative Pressure [dB]
2 5
3 1 . 5
4 0
5 0
6 3
8 0
100
125
160
200
250
315
400
500
630
800
1 k
1k25
1k6
2 k
2k5
3k15
4 k
5 k
6k3
8 k
10k
12k5
16k
[Hz]
9 0
100
1 1 0
120
130
[d B]
2 5
3 1 . 5
4 0
5 0
6 3
8 0
100
125
160
200
250
315
400
500
630
800
1 k
1k25
1k6
2 k
2k5
3k15
4 k 5 k
6k3
8 k
10k
12k5
16k
[Hz]
0
2
4
6
8
1 0
1
2
3
5
8
1 0
[D I] [ Q]
20 50 100 200 500 1k 2k 5k 10k 20k
[Hz]
6 0
5 0
4 0
3 0
2 0
0 . 1
0 . 3
1
3
1 0
[dB] [%]
20 50 100 200 500 1k 2k 5k 10k 20k
[Hz]
180
0
180
360
540
[Deg]
100 200 500 1k 2k 5k 10k 20k
[Hz]
Right
-8 0
-6 0
-4 0
-2 0
0
2 0
4 0
6 0
8 0
Left
Ang le [°]
100 200 500 1k 2k 5k 10k 20k
[Hz]
Bottom
-8 0
-6 0
-4 0
-2 0
0
2 0
4 0
6 0
8 0
Top
Ang le [°]
20 50 100 200 500 1k 2k 5k 10k 20k
[Hz]
6 0
7 0
8 0
9 0
100
[dBSPL]

Front view
All dimensions are in mm
Bottom view Side view
Acoustical axis
Recommended listening distance
Mounting
PSI Audio A21-M s3 / typical characteristics subject to change without prior notice / © RELEC SA.
Refer to user manual for information about installation and safety instructions
SWISS MADE BY RELEC SA, 1400 YVERDON-LES-BAINS
A21-M www.psiaudio.swiss
[e-mail]
1'000 - 3'000