ST TDA7419 User Manual
Features
■ 4 stereo inputs
■ Soft-step volume
■ Bass, middle, treble and loudness
■ Direct mute and soft-mute
■ Four independent speaker outputs
■ Sub woofer output
■ Soft-step speaker/subwoofer control
■ 7 bands spectrum analyzer
■ Digital control:
2
–I
C bus interface
Description
TDA7419
3 band car audio processor
SO-28
The TDA7419 is a high performance signal
processor specifically designed for car radio
applications. The device includes a high
performance audioprocessor with fully integrated
audio filters.
Table 1. Device summary
Order code Package Packing
TDA7419 SO-28 Tube
TDA7419TR SO-28 Tape and reel
The digital control allows programming in a wide
range of filter characteristics. By the use of
BICMOS-process and linear signal processing
low distortion and low noise are obtained.
February 2009 Rev 6 1/40
www.st.com
1
Contents TDA7419
Contents
1 Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
2 Pin description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
3 Electrical specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
3.1 Supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
3.2 Thermal data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
3.3 Absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
3.4 Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
4 Description of the audio processor . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
4.1 Audio processor features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
4.2 Input stages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
4.2.1 Quasi-differential stereo input (QD) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
4.2.2 Single-ended stereo input (SE1, SE2, SE3/AC2IN) . . . . . . . . . . . . . . . . 15
4.3 AutoZero . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
4.3.1 AutoZero remain . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
4.4 Loudness . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
4.4.1 Attenuation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
4.4.2 Peak frequency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
4.4.3 Low and high frequency boost . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
4.4.4 Flat mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
4.5 Soft-mute . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
4.5.1 Soft-step volume . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
4.6 Bass . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
4.6.1 Attenuation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
4.6.2 Center frequency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
4.6.3 Quality factors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
4.6.4 DC mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
4.7 Middle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
4.7.1 Attenuation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
4.7.2 Center frequency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
4.7.3 Quality factors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
2/40
TDA7419 Contents
4.8 Treble . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
4.8.1 Attenuation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
4.8.2 Center frequency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
4.9 Subwoofer filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
4.10 Spectrum analyzer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
4.11 AC coupling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
4.12 HPF applications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
4.13 Output selector and mixing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
4.14 Audioprocessor testing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
4.15 Test circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
5I
2
C bus specification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
5.1 Interface protocol . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
5.1.1 Receive mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
5.1.2 Transmission mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
5.1.3 Reset condition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
5.2 Subaddress (receive mode) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
5.3 Data byte specification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
6 Package information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
7 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
3/40
List of tables TDA7419
List of tables
Table 1. Device summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Table 2. Pin description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Table 3. Supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Table 4. Thermal data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Table 5. Absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Table 6. Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Table 7. Subaddress (receive mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Table 8. Main selector (0) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Table 9. Main loudness (1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Table 10. Soft-mute / clock generator (2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Table 11. Volume / speaker / mixing / subwoofer attenuation (3, 10-15) . . . . . . . . . . . . . . . . . . . . . . 32
Table 12. Treble filter (4) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Table 13. Middle filter (5) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Table 14. Bass filter (6). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Table 15. Second source selector (7) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Table 16. Subwoofer /middle / bass (8) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Table 17. Mixing / gain effect (9) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
Table 18. Spectrum analyzer / clock source / AC mode (16) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
Table 19. Testing audio processor (17) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
Table 20. Document revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
4/40
TDA7419 List of figures
List of figures
Figure 1. Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Figure 2. Pin connection (top view) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Figure 3. Input stage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Figure 4. Loudness attenuation @ fP = 400 Hz. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Figure 5. Loudness center frequencies @ Attn. = 15 dB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Figure 6. Loudness attenuation, fC = 2.4 kHz . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Figure 7. Soft-mute timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Figure 8. Soft-step timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Figure 9. Bass control @ fC = 80 Hz, Q = 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Figure 10. Bass center frequencies @ gain = 15 dB, Q = 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Figure 11. Bass quality factors @ gain = 14 dB, fC = 80 Hz . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Figure 12. Bass normal and DC mode @ gain = 14 dB, fC = 80 Hz . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Figure 13. Middle control @ fC = 1 kHz, Q = 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Figure 14. Middle center frequencies @ gain = 14 dB, Q = 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Figure 15. Middle quality factors @ gain = 14 dB, fc = 1 kHz . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Figure 16. Treble control @ fC = 17.5 kHz . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Figure 17. Treble center frequencies @ gain = 15 dB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Figure 18. Subwoofer control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Figure 19. Spectrum analyzer block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Figure 20. Timing of the spectrum analyzer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Figure 21. Diagram of AC coupling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Figure 22. HPF diagram. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Figure 23. Output selector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Figure 24. Test circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Figure 25. SO-28 mechanical data and package dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
5/40
Block diagram TDA7419
1 Block diagram
Figure 1. Block diagram
MIX/
MIX/
OUTLR2
OUTLR2
OUTSW/
OUTSW/
OUTSW/
OUTLR
OUTLF
OUTLF
Mix
Mix
HPF
HPF
OUTLR
OUTRF
OUTRF
Mix
Mix
HPF
HPF
OUTRR
OUTRR
OUTSW/
OUTRR2
OUTRR2
FILOR
FILOR
ACINR/
ACINR/
FILOL
FILOL
ACINL/
ACINL/
ACOUTR/
ACOUTR/
AC2OUTR
AC2OUTR
ACOUTL/
ACOUTL/
AC2OUTL
AC2OUTL
MUTE
MUTE
Softstep
Softstep
MonoFader
MonoFader
Softstep
Softstep
Loudness MiddleTreble BassSoftMute
Loudness MiddleTreble BassSoftMute
Softstep
Softstep
Softstep
Softstep
Softstep
MonoFader
MonoFader
MonoFader
MonoFader
Volume
Volume
Softstep
Softstep
MonoFader
MonoFader
Softstep
MonoFader
MonoFader
LPF
LPF
Subwoofer
Subwoofer
Softstep
Softstep
MonoFader
MonoFader
SE3R
SE3R
AC2INR/
AC2INR/
SE3L
SE3L
AC2INL/
AC2INL/
SDASCL
SDASCL
C BUSDIGITAL CONTROL
C BUSDIGITAL CONTROL I2C BUSDIGITAL CONTROL
2
2
I
I
Analyzer
Analyzer
Spectrum
SAOUT SACLK
SAOUT SACLK
Spectrum
InGain
InGain
InGain
AutoZero
AutoZero
SE1L
DIFFL
DIFFL
SE1L
DIFFG
DIFFG
DIFFR
DIFFR
InGain
INPUT
INPUT
MULTIPLEXER
MULTIPLEXER
SE2L
SE2L
SE1R
SE1R
6/40
VREFOUTF
VREFOUTF
SUPPLY
SUPPLY
VDD CREFGND
VDD CREFGND
SE2R
SE2R
TDA7419 Pin description
2 Pin description
Figure 2. Pin connection (top view)
ACOUTR/AC2OUTR
ACINR/FILOR
ACINL/FILOL
ACOUTL/AC2OUTL
SE3L/ACINL
SE3R/ACINR
Table 2. Pin description
Pin
N#
Pin name Function I/O
28
2
3
4
5
6
SE2L
SE2R
SE1L OUTLF
SE1R OUTLR
DIFFL
DIFFG
DIFFR OUTSW/OUTLR2
7
8
9
10
12
13
D04AU1569
27
26
25
24
23
22
21
20
19
18
17
16
1514CREF GND
MIX/OUTSW/OUTRR21
VREF
SAOUT
SAIN
VDD
SDA
SCL
MUTE
OUTRR11
OUTRF
1 ACOUTR / AC2OUTR AC coupling right output / HPF filter AC2OUT right channel O
2 ACINR / FILOR AC coupling right input / HPF filter FILO right channel I/O
3 ACINL / FILOL AC coupling left input / HPF filter FILO left channel I/O
4 ACOUTL / AC2OUTL AC coupling left output / HPF filter AC2OUT left channel O
5 SE3L / ACINL Single-ended input 3 left channel / AC coupling left input I
6 SE3R / ACINR Single-ended input 3 right channel / AC coupling right input I
7 SE2L Single-ended input 2 left channel I
8 SE2R Single-ended input 2 right channel I
9 SE1L Single-ended input 1 left channel I
10 SE1R Single-ended input 1 Right channel I
11 DIFFL Pseudo differential stereo input left I
12 DIFFG Pseudo differential stereo input common I
13 DIFFR Pseudo differential stereo input right I
14 CREF Reference capacitor O
15 GND Ground S
nd
16 OUTSW / OUTLR2 Subwoofer output / 2
rear left output O
17 OUTRF Front right output O
7/40
Pin description TDA7419
Table 2. Pin description (continued)
Pin
N#
18 OUTRR Rear right output O
19 OUTLR Rear left output O
20 OUTLF Front left output O
21 MUTE External mute pin I
22 SCL I2C bus clock I
23 SDA I2C bus data I/O
24 VDD Supply S
25 SAIN Spectrum analyzer clock input I
26 SAOUT Spectrum analyzer output O
27 VREF Vref output O
28
Pin name Function I/O
MIX / OUTSW /
OUTRR2
Mix input / Additional subwoofer output / 2
nd
rear right output I/O
8/40
TDA7419 Electrical specifications
3 Electrical specifications
3.1 Supply
Table 3. Supply
Symbol Parameter Test condition Min. Typ. Max. Unit
V
Supply voltage 8.0 8.5 10 V
s
Supply current Vs = 8.5 V 30 35 40 mA
I
s
SVRR Ripple rejection @ 1 kHz Audioprocessor (all Filters flat) 60 dB
3.2 Thermal data
Table 4. Thermal data
Symbol Parameter Value Unit
R
Th j-pins
Thermal resistance junction to pinsmax 85 °C/W
3.3 Absolute maximum ratings
Table 5. Absolute maximum ratings
Symbol Parameter Value Unit
V
Operating supply voltage 10.5 V
s
T
T
V
Operating temperature range -40 to 85 °C
amb
Storage temperature range -55 to +150 °C
stg
Human body model ≥±1750
ESD withstand voltage
ESD
Charged device model ≥±1500
VMachine model ≥±150
9/40
Electrical specifications TDA7419
3.4 Electrical characteristics
Table 6. Electrical characteristics
V
= 8.5V; T
S
= 25°C; RL = 10kΩ; all gains = 0 dB; f = 1 kHz; unless otherwise specified
amb
Symbol Parameter Test condition Min. Typ. Max. Unit
Supply
Supply voltage 8 8.5 10 V
V
S
Supply current 27 37 47 mA
I
S
Input selector
R
Input resistance All single ended inputs 70 100 130 kΩ
in
All Input 1.8 2 V
V
G
IN MIN
G
IN MAX
G
S
STEP
Clipping level
CL
Input separation 80 100 dB
IN
QD input 1.7 2 V
Min. input gain -1 0 1 dB
Max. input gain 13 15 17 dB
Step resolution 0.5 1 1.5 dB
Adjacent gain steps -5 1 5 mV
V
V
offset
DC steps
DC
to G
G
MIN
MAX
-20 4 20 mV
Remaining offset with AutoZero 0.5 mV
Differential stereo inputs
RMS
RMS
R
Input resistance Differential 70 100 130 KΩ
in
CMRR Common mode rejection ratio
e
Output noise @ speaker outputs
No
MIxing control
M
G
A
A
LEVEL
STEP
Mixing ratio Main / mix source -6/-6 dB
Max gain 13 15 17 dB
MAX
Max attenuation -83 -79 -75 dB
MAX
Step resolution 0.5 1 1.5 dB
Loudness control
A
A
f
STEP
Peak
Max attenuation -17 -15 -13 dB
MAX
Step resolution 0.5 1 1.5 dB
Peak frequency
=1 VRMS @ 1 kHz 46 70 dB
V
CM
=1 VRMS @ 10 kHz 46 60 dB
V
CM
20 Hz to 20 kHz, flat;
all stages 0 dB
f
P1
f
P2
f
P3
360 400 440 Hz
720 800 880 Hz
2200 2400 2600 Hz
12 μV
10/40
TDA7419 Electrical specifications
Table 6. Electrical characteristics (continued)
V
= 8.5V; T
S
Symbol Parameter Test condition Min. Typ. Max. Unit
Volu m e cont r o l
= 25°C; RL = 10kΩ; all gains = 0 dB; f = 1 kHz; unless otherwise specified
amb
G
A
A
STEP
E
V
Max gain 13 15 17 dB
MAX
Max attenuation -83 -79 -75 dB
MAX
Step resolution 0.5 1 1.5 dB
Attenuation set error
A
Tracking error 2dB
E
T
DC steps Adjacent attenuation steps -3 0.1 3 mV
DC
Soft-mute
A
MUTE
V
TH Low
V
TH High
R
V
Mute attenuation 80 100 dB
Delay time
T
D
Low threshold for SM pin 1 V
High threshold for SM pin 2.5 V
Internal pull-up resistor 32 45 58 kΩ
PU
Internal pull-up voltage 3.3 V
PU
Bass control
G = -20 to +20 dB -0.75 0 +0.75 dB
G = -79 to -20 dB -4 0 3 dB
From 0dB to G
MIN
-5 0.5 5 mV
T1 0.48 1 ms
T2 0.96 2 ms
T3 70 123 170 ms
Fc Center frequency
Q
BASS
C
RANGE
A
STEP
DC
Quality factor
Control range ±14 ±15 ±16 dB
Step resolution 0.5 1 1.5 dB
Bass-DC-gain
GAIN
f
C1
f
C2
f
C3
f
C4
Q
1
Q
2
Q
3
Q
4
54 60 66 Hz
72 80 88 Hz
90 100 110 Hz
180 200 220 Hz
0.911.1
1.11.251.4
1.3 1.5 1.7
1.822.2
DC = off -1 0 +1 dB
DC = on (shelving filter, use for
cut only)
-4.4 dB
11/40
Electrical specifications TDA7419
Table 6. Electrical characteristics (continued)
V
= 8.5V; T
S
Symbol Parameter Test condition Min. Typ. Max. Unit
Middle control
= 25°C; RL = 10kΩ; all gains = 0 dB; f = 1 kHz; unless otherwise specified
amb
C
RANGE
A
STEP
Q
BASS
Control range ±14 ±15 ±16 dB
Step resolution 0.5 1 1.5 dB
f
Center frequency
c
Quality factor
Treble control
C
RANGE
A
STEP
Clipping level ±14 ±15 ±16 dB
Step resolution 0.5 1 1.5 dB
fc Center frequency
Speaker attenuators
f
C1
f
C2
f
C3
f
C4
Q
1
Q
2
Q
3
Q
4
f
C1
f
C2
f
C3
f
C4
400 500 600 Hz
0.811.2kHz
1.2 1.5 1.8 kHz
22.53kHz
0.45 0.5 0.55
0.65 0.75 0.85
0.911.1
1.11.251.4
81012kHz
10 12.5 15 kHz
12 15 18 kHz
14 17.5 21 kHz
G
A
A
A
MUTE
V
STEP
E
Max gain 14 15 16 dB
MAX
Max attenuation -83 -79 -75 dB
MAX
Step resolution 0.5 1 1.5 dB
Mute attenuation 80 90 dB
Attenuation set error 2 dB
E
DC steps Adjacent attenuation steps -5 0.1 5 mV
DC
AUdio outputs
V
R
V
Clipping level
CL
Output impedance 30 100 W
OUT
Output load resistance 2 kΩ
R
L
Output load capacitor 10 nF
C
L
DC voltage level 3.8 4.0 4.2 V
DC
d = 0.3%
Subwoofer attenuator
G
A
Max gain 14 15 16 dB
MAX
Max attenuation -83 -79 -75 dB
MAX
12/40
1.8 2 V
RMS
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