INTRODUCTION
Thank you for your purchase of the SL33b Stereo Program Limiter.
This device provides smooth dynamics processing for mainly consumer-level equipment. Since there is no audio level standard for
consumer audio equipment, the SL33b keeps the levels maintained
for a more comfortable listening environment.
consumer program material.
... anywhere you need smooth compression of
- School/Church
- Night Club
WARRANTY
For complete information on the Rolls 1 Year Warranty, and to register this product, see our website at www.rolls.com.
DESCRIPTION
3.5mm 3.5mm
INPUTS OUTPUTS
www.rolls.com
0
SL33b
- dB +20
MAKEUP
GAIN
THRESHOLD
FRONT PANEL
Makeup Gain: This control varies the amount of post-compressor
circuit gain. Essentially, this acts as an output level control.
Threshold: This control sets the level at which compression begins.
REAR PANEL
INPUTS: R, L and R/L; 3.5mm stereo and RCA input jacks.
OUTPUTS:R, L and R/L; 3.5mm stereo and RCA output jacks.
12 VDC: Connects to the included Rolls model PS27 12 VDC
power supply.
-10
-13 dB +6
+
-
0
pwr
- Restaurant
SL33b Stereo Program Limiter
SL33b Stereo Program Limiter
SL33b Stereo Program Limiter
The SL33b acts as an audio program material leveler
for mainly consumer audio. It heps control the level
over loud, obnoxious commercials for example.
SCHEMATIC
C2
C5
46
P1B
P100K X2
R1
4.7K
C6
2
J3B
RCAX4
LEFT
- Stereo Compressor/Limiter
- 1/8” stereo / RCA Inputs and Outputs
1
Rev:
1
8
J3D
RCAX4
J2
3.5STJK
5
C8
47U
R12
51
1
4560
4
U1A
R6
10K
27PF
R7
R3
10K
2
3
C12
1U
10K
6
VB
H1F
HD9
6
J3C
RCAX4
4
C9
47U
R8
51
7
4560
8
U1B
VCC
R4
10K
C3
27PF
VB
6
5
R5
10K
C7
1U
8
VB
H1H
HD9
P2
P100K
R18
47K
VB
R9
10K
OUT A
V+
IN A
2
7
8
Sheet of
SL33b.SCH A
5968 So 350 West
Murray Utah 84107
Rolls Corporation
Document Number:
22 May 2009
SL33b STEREO PROGRAM LIMITER
Ba
Date:
- Automatic program limiting
- Output Level control
- Threshold control
SPECIFICATIONS
Inputs: 3.5mm stereo, RCA unbalanced
Outputs: 3.5mm stereo, RCA unbalanced
Compression Ratio: Program dependent
LIMITER MODULE
3
H1C
HD9
H1E
H1G
HD9
7
7
27PF
4560
8
VCC
5
6
1U
7
J1
U2B
5
VB
3.5STJK
P1A
J3A
13
P100K X2
R2
C1
1
RCAX4
RIGHT
4.7K
HD9
5
1
C4
27PF
4560
U2A
2
2
3
1U
3
H1A
HD9
H1B
HD9
H1D
HD9
1
2
4
R21
1K
4
VCC
VB
VCC
345
THRESH
D2
PWR
9 - 16 VDC
TIP NEG
BARRELL POS.
1
6
SW
IN B
GND
OUT B
R17
4.7K
LDRR
VB
R15
22K
R16
18K
C16
47U
C10
1KUF
D1
1N4001
231
J6
JAPDC
Threshold: Variable; -13 to +6 dB
Input Impedance: 10K Ohms bal/unbal
Output Impedance: 50 Ohms bal/unbal
Max Input Level: + 10 dBV
Max Output Level: + 13 dBV
Power: 12 VDC, 50 mA
Dimensions: 4” x 3.35” x 1.5” (W x H x D)
Weight: 1 lb.
Rolls Corporation
Salt Lake City, UT
6/09
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