Page 1
SPECIFICATIONS
REV A 9/98
INFINITY SYSTEMS, INC. 250 Crossways Park Dr., Woodbury, New York 11797
IRS BETA
Technical Manual
IRS BETA
• Drivers (per channel):
— Woofers: Four 12”
Polypropylene/Graphite
— Mid Bass: 2 L-EMIMs
— Midrange: 1 EMIM
— Tweeters: 1 EMIM/front
1 EMIT/rear
— Super-Tweeters: 1 SEMIT
— Nominal Impedence: 4 Ohms
• Finish: Santos pau ferro
• Dimensions: (WxDxH) Woofer module:
16 1/2” x 14 1/2” x 64 3/4”
(41.91 x 36.83 x 164.47cm)
Mid/tweeter module:
17” x 1” x 64 3/4”
(43.18 x 2.54 x 164.47cm)
Base footprint:
18” x 17” (45.72 x 43.18cm)
• Weight: Woofer module:
140 lbs (63.64kg)
Mid/tweeter module:
75 lbs (34.09kg)
• Special Features: Monster cable
ARC wire
Solen caps
Wonder caps
• Frequency Response: 15Hz to 45KHz ±2 dB
• Crossover Frequencies: 100Hz, 750Hz, 4500Hz,10kHz
• Passive Crossover Controls: Super tweeter level
Tweeter level
Upper midrange level
• Electronic Crossover High pass filter
Controls: Low pass filter
Bass contour
Low freqency phase
Low frequency level
• Mid/Tweeter Amplifier 75-300 watts/ch RMS
REQUIREMENTS:
•Bass Amplifier Requirements: 150-500 watts/ch RMS
PRODUCTION HISTORY:
• Introduced in 1987
• Discontinued in 1992
• Original Retail Price: $11,950.00
PHYSICAL SPECIFICATIONS:
COSMETIC PARTS:
Grille Mid/Twt Front A025-3462
Grille Woofer Tower A025-3473
Grille Mid/Twt Rear A025-3666
Cover Plate Greeks .707-3719
Logo 2” Mobius .716-0340
Crossover Dust Cover .760-3556
Spiked Feet St 1/4 .846-3669
Foot 1 1/16” Metal .846-3671
CROSSOVER PARTS:
Crossover Assy. A015-3457
5-Way Binding Post .528-3551
Crossover Cup .653-3553
Circuit Brkr .85A-30 .871-3212
Servo Cable 50’ .639-4406
Servo Control Unit IF979900
DRIVERS (TRANSDUCERS)
Control Woofer A028-3582
EMIM Mid Rev D (Repair Only) .902-0012D
12” Woofer IMG .902-3054
L EMIM .902-3431
SEMIT Rectangle Blk .902-3465
EMIT Square Blk .902-3721
SEMIT Diaph .751-3221
EMIT Diap 1/2 LS .751-3722
EMIM Diaph Rev D .751-3806
IRS 5
Page 2
TECHNICAL SPECIFICATIONS
REV A 7/98
INFINITY SYSTEMS, INC. 250 Crossways Park Dr., Woodbury, New York 11797
IRS BETA
Technical Manual
IRS BETA
C1
2µF (W)
R1
10½ 10W
5
–
+
OUTPUT
–
.85A 30
2.5A 30
C2
.01µF (W)
C3
2µF (W)
C4
.01µF (W)
C7
4µF (W)
C8
.01µF (W)
C10
500µF (S)
C16
100µF (W)
C12
.01µF (W)
C15
150µF
C16
100µF (S)
C17
.01µF (W)
L.3
.6mH
.5mH
L8
7.5mH
L6
L2
.05mH
R3
4½ 10W
.2mH
C18
300µF
C19
100µF (S)
C20
.01µF (W)
L1
.2mF
C5
3µF (W)
C6
.01µF (W)
L5
.4mH
L4
.4mHR412½ 5W C9
L7
C13
20µF
L9
4mH
C21
35µF
C14
5µF (S)
R6
2½ 30W
2µF (S)
C22
5µF (S)
R2
5½ 5W
R5
5½ 5W
R7
5½ 30W
L10
3mH
1N5338B
(2)
1N5352B
(2)
REAR EMIT TWEETER
6
+
2
+
FRONT SEMIT TWEETER
1
–
4
+
FRONT SEMIT TWEETER
3
–
8
+
1 MIN MIDRANGE
–
7
10
+
L – EMIN MID/BASS
11
–
(W) – Wonder Capacitor
(s) – Solen Capacitor
Page 3
TECHNICAL SPECIFICATIONS
REV A 7/98
INFINITY SYSTEMS, INC. 250 Crossways Park Dr., Woodbury, New York 11797
IRS BETA
Technical Manual
IRS BETA
DIN CORD 639–4406
3/4"
TRIM FOIL SHIELD AT
BOTH ENDS OF INSULATION
CABLE, 2–COND W/DRAIN (4 FT)
.609...3535
WOOFERS
A
“A”
10
40
30
20
AS SEEN FROM
4
3
DRAIN (BARE)
CONNECTOR END
CONTROL WOOFER LUG
4–PIN DIN SOCKET
.535...3581
.205 CLIP (3)
CRIMP AND SOLDER
14
.542...4884
RED
BARE
BLACK
2"
BLACK WIRE
RED WIRE
1
2
REAR VIEW
(RED)
(BLACK)
J–4
J–5
J–6
“B”
10
40
30
20
RED STRIPE
+
–
13
16
+
–
15
18
B
+
–
17
20
CONTROL WOOFER
.028-3582
+
–
19
–
+
TERM CUP
Page 4
TECHNICAL SPECIFICATIONS
REV A 7/98
INFINITY SYSTEMS, INC. 250 Crossways Park Dr., Woodbury, New York 11797
IRS BETA
Technical Manual
IRS BETA/GAMMA
SERVO CONTROL UNIT
CONTOUR
R3
R2
100k
100k
CCW
C3
22pF
13
2
14
–
IC1a
+
3
12
= IC 101
n
LF STAB
R23
200k
C14
1000pF
R24
100k
9
–
8
IC2a
+
10
C16
.56µF
R25
680
R6
4.7k
b
1
.1µF
R4
4.7k
R7
22M
R5
4.7k
C15
1µF
+15V
R28
10
R29
9.1k
C17
4
f
12
.1µF
+
IC2b
–
C18
13
11
.1µF
R26
1k
R27
10
–15V
R87
R85
10k
20k
D9
R86
10k
12
j
+
D10
R88
(4)
10K
D11
D12
14
IC5c
13
–
R90
10K
R89
10k
HIGH PASS FREQUENCY
LOW PASS FREQUENCY
R10
C5
.1µF
C4
C6
.1µF
•
Ro
g
C19
2µF
14
R30
50k
R91
10k
10
R9
•
22M
Rc
9
6
8
7
–
IC1b
+
c
5
10
•
SEE PAGE 2
OUT
a
TP – 2
TP – 3
+15V
a
FB
R33
50k
–15V
C33
10µF
16V
+
IC5d
9
–
R93
18k
R92
10k
–18V
R31
470k
R32
51k
OUTPUT
OFFSET
R34
51k
k
8
4700pF
+ V a
C21
1µF
R36
470
5
+
7
IC2c
–
6
C20
R35
470k
R94
10k
15
1N4454
R37
47k
C22
R38
.65µF
22k
R30
C23
1k
.068µF
R40
510
TO C30+
(PAGE 2)
–0.7V
R95
Ÿ
D13
10k
R11
22M
22M
•
Rg
Re
C7
.065µF
h
R41
3.9k
R42
2.7k
R43
1.3k
R98
1k
02
2N4401
LEFT
CHANNER
ACCELEROMETER
AND REMOTE
TURN ON
DIN
4 PIN
FEMALE
J5
DIN
4 PIN
FEMALE
J105
(R CH)
OUTPUT IC2c
OUTPUT ICT02c
BYPASS
IMPUT
R1
J1
a
100k
J2
C1
.047µFC2.047µF
R22
51k
R17
1.0k
R21
100µF
1M
C13
10µF
16V
+
R20
100kC12
15V
R19
11k
+15V
R83
10
C31
0.1
5
4
+
7
IC5a
6
–
h
1N445-4
i
2
–
1
IC5b
+
11
3
C32
0.1
R84
10
R18
1.0k
20
10
40
30
20
10
40
30
}
}
SEE
PAGE 2
SEE
PAGE 2
R81
10k
R82
10k
+
+15V
R12
10
•
C8
.033µF
C9
10
5
.1µF
4
+
8
7
IC1c
6
–
11
9
R13
d
C10
.1µF
10
–15V
C24
5pF
R48
R44
51k
51k
2
i
–
1
IC2d
+
3
0
R45
220
54 a
–6
OPEN LOOP
GAIN COMP
–12
R47
0
3.9k
K1
SERVO CONTROL UNIT
–6
R48
–12
2.7k
R49
1.3k
IRS SERIES
C11
5pF
R14
51k
R15
51k
13
2
–
IC1d
+
3
12
h
R50
i
220
54 c
14
LF
SERVO
OUTPUTS
K1
PHASE
S3
+
0
1
180¡
•
+ Ø
J3
J4
– Ø
1r16
5K
LOW FREQUENCY
LEVEL
X-OVER OUT
CCW
TP–1
–15V
+28V
+ 15V OUT
IC3
C25.28
MC7815CT
+
2200µF
35V
X2
C25.28
+
2200µF
35V
X2
MC7915CT
IC4
R75
2k
R70
1.5k
3k½
–15V OUT
D4
R77
10M
1N4454
D8
1N4002
R79
91
C30
1µF
SERVO
ON
D8
GREEN
K1
K101
R78
470
Q1
VN10KM
D5
6.2V
1N4735A
100 VAC
50/60 Hz
POWER
F1, FH1
120/240
VAC
50/60 Hz
POWER
120
240
F1, FH1
REMOTE TURN ON
REMOTE TURN ON
S5
T1
BLK
GRY
S6
BRN
BLU
WHT
R80
1k
1N4002
R180
1k
POWER
ON
RED
D7
R74
2.2k
2W
D2
1N4002
D3
+
C29
10µF
50V
S5
BLK
GRY
120
S6
240
BRN
BLU
WHT
TO DIN 4 PIN FEMALE
TO DIN 4 PIN FEMALE
PIN 4
{
J5
PIN 3
PIN 4
{
J105
PIN 3
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