P R E L I M I N A R Y
NJM2192A
- 1 A
SRS TruBass Bass Enhancement Processor
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PACKAGE OUTLINE
NJM2192AL
NJM2192AM
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GENERAL DESCRIPTION
The NJM2192A is a Bass Enhancement Processor,
based on SRS TruBass technology.
The NJM2192A eliminates the need for large
speakers to create low frequency fundamental tones,
and it enhances and complements subwoofer
performance.
The NJM2192A is suitable for audio applications
which are speaker system for mini components, CD
radio cassette, multimedia speaker systems, TV and
others.
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FEATURES
q
Operating Voltage
4.7 to 13V
q
Punch Control
q
Internal Bass Gain Control Switch
q
Bypass Function (Through)
q
Internal Mode Switch
q
External Adjustment for Speaker Size (Small, Medium, Large)
q
Bipolar Technology
q
Package Outline
SDIP30, SDMP30
The TruBass technology right incorporated in the NJM2192A are owned by SRS Labs, a U.S. Corporation and licensed to
New Japan Radio Co., Ltd. TruBass is protected under U.S. and foreign patents issued and/or pending. TruBass and the
, are trademarks of SRS Labs, Inc. in the United States and selected foreign countries. Neither the purchase of the
NJM2192A, nor the corresponding sale of audio enhancement equipment conveys the right to sell commercialized
recordings made with any SRS technology.
SRS Labs requires that all users of the NJM2192A must enter into a license agreement directly with SRS Labs if the
royalty is not included in the purchase price. SRS Labs also requires any users to comply with all rules and regulations as
outlined in the SRS Trademark Usage Manual.
For further information, please contact:
SRS Labs, Inc.
2909 Daimler Street. Santa Ana, CA 92705 USA
Tel:949-442-1070 Fax:949-852-1099 http://www.srslabs.com
NJM2192A
- 3 -
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ABSOLUTE MAXIMUM RATINGS (Ta=25
C)
PARAMETER SYMBOL
RATING
UNIT
Supply Voltage
V
+
15 V
Power Dissipation
P
D
700
mW
Operating Temperature Range
T
opr
-40 to +85
C
Storage Temperature Range
T
stg
-40 to +125
C
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ELECTRICAL CHARACTERISTICS (V
+
=12V,Ta=25
C,V
IN
=-20dBV(100mVrms), Speaker Size : Medium)
TEST CONDITION
IN
PARAMETER SYMBOL
L R
OUT
MODE
PUNCH
VR
MIN. TYP. MAX. UNIT
Operating
Voltage
V
+
-
-
-
-
- 4.7
12.0
13.0
V
0 0 -
BYPASS
- 6.6
11.6
16.6
0 0 -
BASS1
MAX 6.6 11.6 16.6
Supply
Current
I
CC
No
Signal
0 0 -
BASS2
MAX 6.6 11.6 16.6
mA
Reference
Voltage
V
REF
V
+
/2 0
0
-
-
- 5.8 6.0 6.2 V
V
I N
- L
f=1kHz
THD=3%
- V
I N
R
BYPASS
-
10.7
(3.1)
11.7
(3.8)
-
V
I N
V
I N
L
f=100Hz
THD=3%
Gain "L"
V
I N
V
I N
R
BASS1
MAX
-6.3
(0.5)
-4.3
(0.6)
-
V
I N
V
I N
L
Maximum
Input Voltage
V
IM
f=100Hz
THD=3%
Gain "L"
V
I N
V
I N
R
BASS2
MAX
-4.7
(0.6)
-2.7
(0.7)
-
dBV
(Vrms)
L
Rg=0
A-Weighted
0 0
R
BYPASS
- -
-105
(5.6)
-98
(12.6)
L
Output Noise
V
NO
Rg=0
A-Weighted
Gain "L"
0 0
R
BASS2
MAX -
-94
(20.0)
-88
(40.0)
dBV
(uVrms)
V
I N
- L
f=1kHz
V
IN
=-10dBV
- V
I N
R
BYPASS
- -
0.005
0.01
V
I N
V
I N
L
f=100Hz
Gain "L"
V
I N
V
I N
R
BASS1
MAX - 0.1 1.0
V
I N
V
I N
L
Total
Harmonic
Distortion
THD
f=100Hz
Gain "L"
V
I N
V
I N
R
BASS2
MAX - 0.1 1.0
%
V
I N
- L
BYPASS
Gain
GV
BYP
f=1kHz
- V
I N
R
BYPASS
- -1.0
0.0
1.0
dB
NJM2192A
- 4 -
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ELECTRICAL CHARACTERISTICS (V
+
=12V,Ta=25
C,V
IN
=-20dBV(100mVrms), Speaker Size : Medium )
TEST CONDITION
PARAMETER SYMBOL
IN
OUT
MODE
PUNCH
VR
MIN. TYP. MAX. UNIT
V
I N
V
I N
L
f=100Hz
Gain "L"
V
I N
V
I N
R
BASS1
MAX 11.2 13.2 15.2
V
I N
V
I N
L
f=100Hz
Gain "L"
V
I N
V
I N
R
BASS1
MIN -18.4 -14.4 -10.4
V
I N
V
I N
L
f=100Hz
Gain "H"
V
I N
V
I N
R
BASS1
MAX 15.7 17.7 19.7
V
I N
V
I N
L
f=100Hz
Gain "L"
V
I N
V
I N
R
BASS2
MAX 12.8 14.8 16.8
V
I N
V
I N
L
BASS Gain
GV
BASS
f=100Hz
Gain "H"
V
I N
V
I N
R
BASS2
MAX 16.6 18.6 20.6
dB
V
IH
19,20,21pin - - - - - 2.0 - V
+
Switch
Control
Voltage
V
IL
19,20,21pin - - - 0.0 - 0.7
V
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MODE SWITCH FUNCTION
MODE1
MODE2 NOTES
BYPASS (a)
L
-
Input Through
BASS1 (c)
H
L
Low Frequency Content of TruBass
(1)
BASS2 (b)
H
H
TruBass Mode
(2)
(1) BASS1:The output signal is low frequency content of TruBass derived from the stereo audio signal.
(2) BASS2:TruBass Mode.
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BASS INPUT AMP GAIN SWITCH FUNCTION
To Increase the TruBass effect with the GAIN Switch.
GAIN NOTES
Gain Low
L
Normal Position
Gain High
H
Gain +6dB
NJM2192A
- 5 -
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INPUT TERMINAL OPERATING INSTRUCTION
NJM2192As input equip 4 terminals INL(28pin), INR(26pin), BASSINL(27pin) and BASSINR(25pin).
"Normal Setting"
Short INL and BASSINL, INR and BASSINR at the normal TruBass mode.
"Connect to the other surround ICs(TruSurround, SRS, etc.)"
If NJM2192A is used with the other surround ICs, the low frequency signal is possible to be amplified by the
other surround ICs. Then the audio stereo signal input into the BASSIN L/R, and the other surround signal input
into INL/R.
"Adjust TruBass effect"
Insert an attenuator before the BASSIN L/R if necessary.
Lch input
Rin input
NJM2192A
INL
INR
BASSINL
BASSINR
TruBass output signal
OUTL
OUT
INL
INR
BASSINL
BASSINR
NJM2192A
OUTL
OUT
Passive Matrix
TruSurround
NJM2188
etc.
Lch input
Rch input
(
)
Set the attenuator : (R
A
+R
B
)
50k
Rch input
INR
BASSINR
INL
BASSINL
VREF
NJM2192A
VREF
Lch input
OUTL
OUTR
50k
50k
50k
50k
Input attenuator
(
)
R
A
R
B
R
A
R
B
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