Output Power: 854W RMS x 1 @ 4 ohms; ≤1% THD + N
(14.4 VDC) 1300W RMS x 1 @ 2 ohms; ≤1% THD + N
Signal-to-noise ratio: 72dBA (reference 1W into 4 ohms)
Dynamic power: 1516W channels @ 2 ohms
Effective damping factor: 6.357 @ 4 ohms
Frequency response: 17Hz – 302Hz (-3dB)
Maximum input signal: 5.7V
Maximum sensitivity: Reference 1210a - 260mV
Reference 1211a - 75mV
DC Offset <50mV (-50%)
Output regulation: .132dB @ 4 ohms
Idle Current 2.8A
Input Impedance 22kΩ
Max Current Draw 70A @ 4 ohms
125A @ 2 ohms
Dimensions: 12 x 18 1/2 x 2 11/16” (L x W x D)
(305mm x 470mm x 68mm)
Fuse: 3 x 40A
Infinity continually strives to update and improve existing products, as well as create new ones. The specifications and details in
this and related JBL publications are therefore subject to change without notice.
Page 3
Power Amplifier Reference 1210a/1211a
2
Features
x 1-Channel Operation
x Advanced MOSFET Oversized Floating Rail Power Supply
x Floating Ground Factory
x Variable lnput Sensitivity (250mV
x Fully Complementary Output Stage with Class-D Voltage Amplification
x Gold-plated Power, lnput and Output Connectors
x 2-Ohm Stable
- Head - Unit Speaker - Level input
- 6V)
Test Conditions and Notes
x All tests to be done, unless otherwise specified, from 10Hz to 302Hz at 14.4V DC
into 2 ohm loads and adjust the units gain so that with a .250 volt input signal the
unit is at Its maximum rated output. All measurements will be done using an
Audio precision system one and the supply voltage.
x An A+ line voltage of 14.4V DC shall be applied to the unit under test for all
measurements unless otherwise specified. The voltage applied to the unit shall
be measured at the power connection on the Amplifier.
x Signal Source
Unless otherwise specified, all tests shall be conducted with the Audio Signal
Generator output configured to be balanced, less than or equal to 50 ohm source
impedance, and floating. The signal source "GND" shall be connected to the
Amplifier PWR GND at the Amplifier.
x Output Load
Unless otherwise specified, all tests shall be conducted with 2 ohm resistive
loads having less than 10% reactive components at any frequency below 302Hz.
Each resistor shall have a value that remains within 1
rated output of the unit under test.
xPower Indicator Green LED steadily illuminates for normal operation. Illuminates
up Red LED blinks when protection circuitry is engaged, and during power up.
% while dissipating the
Page 4
The Reference amplifiers are capable of
delivering high power levels, and require a
reliable connection to the vehicle’s electrical
system in order to perform optimally. See
Figure 1 for connection location. Please
adhere to the following instructions carefully.
GROUND CONNECTION
Connect the amplifier’s Ground (GND) terminal
to a solid point on the vehicle’s metal chassis,
as close to the amplifier as possible. Refer to the
chart below to determine minimum wire-gauge
size. Sand away any paint from this location; use
a star-type-lock washer to secure the connection.
POWER CONNECTION
Connect a wire (see chart at right for appropriate
gauge) directly to the vehicle’s positive battery
terminal, and install an appropriate fuse holder
within 18" of the battery terminal. Do not
install the fuse at this time. Route the wire to
the amplifier’s location, and connect it to the
amplifier’s positive (+12V) terminal. Be sure to
use appropriate grommets whenever routing
wires through the firewall or other sheet metal.
Failure to adequately protect the positive wire
from potential damage may result in a vehicle
fire. When you are done routing and connecting
this wire to the battery and to the amplifier,
you may install the fuse at the battery. The
fuse value should be selected based on total
amplifier-current draw; see chart at right.
REMOTE CONNECTION
Connect the amplifier’s Remote (REMOTE)
terminal to the source unit’s Remote Turn-On
lead using a minimum of 18-gauge wire. If your
source unit does not have a remote turn-on
connection, connect the amplifier’s (REMOTE)
terminal to the vehicle’s accessory circuit.
SPEAKER CONNECTIONS
Refer to the application guides on the pages
that follow. Speaker connections should be
made using a minimum of 16-gauge wire.
NOTE: When using the low-level or high-level
inputs, the AUX outputs can be used to pass a
full-range line-level signal to another amplifier.
These recommendations assume 7' – 10' wire
runs. If your installation differs markedly, you
will need to adjust the wire gauge accordingly.
Page 5
Figure 4. Reference subwoofer amplifier with one woofer connection.
Figure 3. Reference subwoofer amplifier with two woofer connections.
The Reference subwoofer amplifiers are
single-channel amplifiers. There are two sets of
terminals to make it easy to connect multiple
woofers. Either set of (+/–) terminals may be
used when connecting woofers.
To the right are two application diagrams to help
plan your subwoofer system installation. Figures
3 and 4 show how to configure the Reference
subwoofer amplifiers (models 311a, 611a and
1211a).
NOTE: For simplicity, Figures 3 and 4 do not
show power, remote and input connections.
NOTE: Minimum speaker load is 2 ohms.
Power Amplifier
4
Reference 1210a/1211a
A
PPLICATIONS
– 1201a/1211a
Page 6
SETTING INPUT SENSITIVITY
1. Initially turn the INPUT LEVEL control(s) to
minimum (counterclockwise).
2. Reconnect the (–) negative lead to the vehi-
cle’s battery. Apply power to the audio system
and play a dynamic music track.
3. On the source unit, increase the volume
control to 3/4 volume. Slowly increase the
INPUT LEVEL control(s) toward three o’clock
until you hear slight distortion in the music.
Then reduce the INPUT LEVEL slightly until
distortion is no longer heard.
NOTE: After the source unit is on, blue LEDs (on
the top panel) will light, indicating the amplifier
is on. If not, check the wiring, especially the
remote connection from the source unit. Also
refer to “Troubleshooting” on page 7.
REMOTE LEVEL CONTROL (OPTIONAL)
All three Reference subwoofer amplifiers and
the 5761a amplifier have inputs for an optional
remote level control (100rc). This will allow the
subwoofer level to be adjusted from the listening
position. Connect the optional remote level
control using the RJ-11 jack on the side of the
amplifier. Install the control module in the front
of the vehicle within easy reach of the driver.
Both the underside of the dash and the center
console are suitable locations. Refer to the
mounting instructions accompanying the 100rc.
AUX OUTPUT
Reference amplifiers (except 5761a) are equipped
with full-range outputs that can be used to
connect additional amplifiers.
NOTE: When using the low- or high-level inputs,
the AUX outputs can be used to pass a full-range
line-level signal to another amplifier.
Figure 13. Control end panel.
Power Amplifier
5
Reference 1210a/1211a
Page 7
STATUS LEDs
Clip: Indicates the amplifier is being overdriven,
and your speakers may be in danger. This
should blink only on musical peaks, and not
be on constantly.
Power: Indicates the amplifier is on.
Protection: Refer to “Troubleshooting” for specific
indications.
Figure 15. LED status.
SETTING DBO
™
(310a, 610a and 1210a)
The Dynamic Bass Optimizer (DBO) is used to
enhance low-frequency reproduction in a vehicle.
Conventional bass-boost circuits only increase
bass at a fixed frequency, and cause the amplifier
to consume considerable power. The DBO allows
you to adjust the frequency (20Hz – 80Hz) as well
as the boost level (up to 12dB; see Figure 14),
allowing you to fine-tune the bass in your system
to optimize performance.
For sealed enclosures, the DBO can be used
to enhance the lower bass region of sealed
enclosures.
For bigger/fuller bass, adjust the HP FREQ
between 35Hz and 45Hz; adjust the BOOST
control according to your preference.
For tighter-sounding bass, adjust the HP FREQ
between 45Hz and 55Hz; adjust the BOOST
control according to your preference.
For vented enclosures, the DBO should be used
as a subsonic filter to reduce overexcursion
of the woofers. Set the HP FREQ control 10Hz
below the tuning frequency of the enclosure
(e.g., 25Hz for a box tuning of 35Hz); adjust the
BOOST control to taste. This will conserve
amplifier power typically wasted on frequencies
below the tuned frequency of the enclosure.
For infinite-baffle applications, set the HP FREQ to
the speaker’s Fs value (reducing overexcursion of
the woofer); adjust the Boost control to taste.
Figure 14. Frequency-response curves show
typical DBO control ranges.
INSTALLATION AND SETUP (CONT.)
-9
-6
-3
0
-12
2080
Freq. (Hz)
dB
DBO HP FREQ Control
(adjusts cut-off
frequency)
HP FREQ
100Hz20Hz
-6
0
6
12
-12
2080
Freq. (Hz)
dB
DBO BOOST Control
(adjusts boost amount
at cut-off frequency)
BOOST
MAX MIN
Power Amplifier Reference 1210a/1211a
6
Page 8
•
PROBLEM:
No audio (POWER LED is off).
CAUSE and SOLUTION:
No voltage at BATT+ and/or REM terminals, or
bad or no ground connection. Check voltages
at amplifier terminals with VOM.
•
PROBLEM:
No audio (PROTECT LED flashes every
4 seconds).
CAUSE and SOLUTION:
DC voltage on amplifier output. Amplifier may
need service; see enclosed warranty card for
service information.
•
PROBLEM:
No audio (PROTECT LED is on).
CAUSE and SOLUTION:
Amplifier is overheated. Make sure amplifier
cooling is not blocked at mounting location;
verify that speaker-system impedance is within
specified limits.
•
PROBLEM:
No audio (PROTECT and POWER LEDs flash).
CAUSE and SOLUTION:
Voltage less than 9V on BATT+ connection.
Check vehicle charging system.
•
PROBLEM:
No audio (PROTECT LED is on).
CAUSE and SOLUTION:
Voltage greater than 16V or less than 8.5V on
BATT+ connection. Check vehicle charging
system.
•
PROBLEM:
Distorted audio.
CAUSE and SOLUTION:
Input sensitivity is not set properly, or amplifier
or source unit is defective. Check INPUT LEVEL
setting, or check speaker wires for shorts or
grounds.
•
PROBLEM:
Distorted audio (PROTECT LED flashes).
CAUSE and SOLUTION:
Short circuit in speaker or wire. Remove
speaker leads one at a time to locate shorted
speaker or wire, then repair.
•
PROBLEM:
Music lacks “punch.”
CAUSE and SOLUTION:
Speakers are not connected properly. Check
speaker connections for proper polarity.
TRS-00-00087 TRANSISTORSMALL SIGNAL PNP "TO-92L"KTA1023YQ402,4032
TRS-00-00088 TRANSISTORSMALL SIGNAL NPN "TO-92L"KTC1027YQ270,271,4013
TRS-00-00090 TRANSISTORSMALL SIGNAL PNP "TO-92"KTA1266GRQ2621
TRS-00-00110 TRANSISTORSMALL SIGNAL NPN "TO-92"KTC3198GRQ101,260,261,2634
RES-00-00479RESISTORMETAL FILM 1/5WF270 OHMR4051
RES-00-00437RESISTORMETAL FILM 1/5WF1KF OHMR151,1562
RES-00-00482RESISTORMETAL FILM 1/5WF2KF OHMR1171
RES-00-00523RESISTORMETAL FILM 1/5WF4.7KF OHMR1131
RES-00-00575RESISTORMETAL FILM 1/5WF7.5KF OHMR1181
RES-00-00589RESISTORMETAL FILM 1/5WF9.4KF OHMR111,1122
RES-00-00402RESISTORMETAL FILM 1/5WF10KF OHMR150,152,155,1574
RES-00-00419RESISTORMETAL FILM 1/5WF13KF OHMR4041
RES-00-00537RESISTORMETAL FILM 1/5WF47KF OHMR103,104,105,106,107,108,109,110,402,40310
RES-00-00606RESISTORCARBON FILM 1/5WJ100 OHMR51,52,53,54,55,56,61,62,63,6413
RES-00-00622RESISTORCARBON FILM 1/5WJ150 OHMR1251
RES-00-00712RESISTORCARBON FILM 1/5WJ470 OHMR241,264,3413
RES-00-00723RESISTORCARBON FILM 1/5WJ510 OHMR120,1222
RES-00-00756RESISTORCARBON FILM 1/5WJ820 OHMR1161
RES-00-00633RESISTORCARBON FILM 1/5WJ1K OHMR50,57,60,67,153,1586
RES-00-00598RESISTORCARBON FILM 1/5WJ1.5K OHMR1331
RES-00-00602RESISTORCARBON FILM 1/5WJ1.8K OHMR1351
RES-00-00702RESISTORCARBON FILM 1/5WJ4.7K OHMR114,262,4143
RES-00-00720RESISTORCARBON FILM 1/5WJ5.6K OHMR131,1322
RES-00-00608RESISTORCARBON FILM 1/5WJ10K OHMR44,119,123,128,129,130,261,263,406,40716
RES-00-00623RESISTORCARBON FILM 1/5WJ15K OHMR121,1262
RES-00-00630RESISTORCARBON FILM 1/5WJ18K OHMR4151
RES-00-00658RESISTORCARBON FILM 1/5WJ22K OHMR101,1022
RES-00-00666RESISTORCARBON FILM 1/5WJ27K OHMR4171
RES-00-00680RESISTORCARBON FILM 1/5WJ30K OHMR1241
RES-00-00730RESISTORCARBON FILM 1/5WJ56K OHMR270,2712
RES-00-00757RESISTORCARBON FILM 1/5WJ82K OHMR1691
RES-00-00604RESISTORCARBON FILM 1/5WJ100K OHMR134,138,154,159,230,231,232,233,234,23622
RES-00-00620RESISTORCARBON FILM 1/5WJ150K OHMR1271
RES-00-00654RESISTORCARBON FILM 1/5WJ220K OHMR4131
RES-00-00727RESISTORCARBON FILM 1/5WJ560K OHMR4081
RES-00-00755RESISTORCARBON FILM 1/5WJ820K OHMR2601
RES-00-00635RESISTORCARBON FILM 1/5WJ1M OHMR4111
RES-00-00018RESISTORMETAL FILM 1/2WJ10 OHMR220,221,222,223,224,226,227,228,229,32018
R409,410,412,416,418,419
R237,238,239,330,331,332,333,334,336,337
R338,339
R321,322,323,324,325,327,328,329
RES-00-00794RESISTORMETAL FILM 1WJ10 OHMR73,832
IND-00-00025 INDUCTORLAL02TB1R0K AXIAL TYPE 5%1uHL1,22
CEC-00-00077CAPACITORCERAMIC DISK 50V "NPO"10pFC105,1062
CEC-00-00090CAPACITORCERAMIC DISK 50V "NPO"22pFC131,132,133,134,153,1546
CEC-00-00101CAPACITORCERAMIC DISK 50V470pFC1091
CEC-00-00074CAPACITORCERAMIC DISK 50V102pFC7,107,108,111,406,701,9007
CEC-00-00076CAPACITORCERAMIC DISK 50V104pFC41,42,73,83,170,171,172,173,174,17524
ICO-00-00005 I.CSMD QUAD OP AMP "SO-14"TL074CDU5011
ICO-00-00099 I.C2.5V SHUNT IC , SOT-89KIA431FU5051
ICO-00-00054 I.CDIVIDER
ICO-00-00546 I.CCOMPARATOR "SO-14"
TRS-00-00197 TRANSISTORHIGH CURRENT PNP,SOT-89KTA1661YQ5031
TRS-00-00115 TRANSISTORHIGH CURRENT NPN,SOT-89KTC4373YQ5021
TRS-00-00113 TRANSISTORSMALL SIGNAL NPN,SOT-23KTC3875GRQ5011
DIO-00-00117 DIODESWITCHING SIGNALRLS4148D501,502,503,504,5055
TRS-00-00087 TRANSISTORSMALL SIGNAL PNP "TO-92L"KTA1023YQ204,206,208,2104(8)
TRS-00-00088 TRANSISTORSMALL SIGNAL NPN "TO-92L"KTC1027YQ203,205,207,2094(8)
RES-00-00401RESISTORMETAL FILM 1/5WF100 OHMR2041(2)
RES-00-00463RESISTORMETAL FILM 1/5WF220 OHMR2031(2)
RES-00-00590RESISTORMETAL FILM 1/5WF910 OHMR202,2062(4)
RES-00-00636RESISTORCARBON FILM 1/5WJ1 OHMR207,208,211,2124(8)
RES-00-00685RESISTORCARBON FILM 1/5WJ330 OHMR420,4212(4)
RES-00-00637RESISTORCARBON FILM 1/5WJ2.2K OHMR201,2052(4)
CEC-00-00076CAPACITORCERAMIC DISK 50V104pFC201,202,204,2054(8)
MYC-00-00088CAPACITORMYLAR 5% 63V "TL TYPE"224JC203,2062(4)
RESISTORMETAL FILM 1/5WF1K OHMR97
RESISTORMETAL FILM 1/5WF10K OHMR95
RESISTORMETAL FILM 1/5WF51K OHMR96
RESISTORMETAL FILM 1/5WF56K OHMR94
RESISTORMETAL FILM 1/5WF68K OHMR93
RESISTORCARBON FILM 1/5WJ1M OHMR98
RESISTORMETAL FILM 1/2WJ1K OHMR192,292