Infinity Reference 1300A Service manual

a m p l i f i e r s
INFINITY
®
REFERENCE AMPLIFIERS
Looking for a moremoving audio experience? Take Infinity®
car audio for a ride. Innovative materials and breakthrough
engineering have always put Infinity products out in front of the
competition. So expectextreme output from Reference Series amps,
but be prepared for accuracy and detail that may surprise you. There
is no better way to make your car audio system stand up and deliver
than by powering your speakers and subs with Infinity electronics.

amplifiers
CLASS D SUBWOOFER AMPS
Efficiency is the benefit of the Infinity
Reference Series Class D subwoofer amplifiers.
A higher percentage of the power the amp
extracts from the car’s charging system is
converted into output to the speakers, and less
is wasted as heat. That is really important if
you're trying to provide power to a 1000-watt
amplifier. Class D technology turns the analog
input signal into a series of pulses that can be
amplified more efficiently by transistors used
as switches, rather than valves. They're either
on and operating at their most efficient level,
or they’re off. The pulses are converted back
into an analog signal by an output filter.
CEA-2006-COMPLIANT
All Infinity amplifiersare tested in accordance
with CEA-2006, which provides a testing
procedureto help customers compare
amplifiers accurately – apples to apples.
Specs are based on industry-accepted
standards, rather than on the whims of
amplifier companies’marketing departments.
Look for the CEA-2006 logo when comparing
amplifiers, to be sure you’re getting the
power you’repaying for.
AUDIOPHILE-QUALITY
FULL-RANGE AMPLIFIERS
Class AB full-range amplifiers offer audiophile-
quality performance and the best compromise
between efficiency, low distortion, maximum
availableheadroom and output power.
AMPS THAT DON’T BREAK
Infinity amplifiers are tested according to the
strictest and most demanding reliability-testing
regimen ever designed for car audio amplifiers.
They areshaken, baked, frozen, dropped and
shocked – all while they’re operating. When
they’ve passed all these tests, they are tested
again. The resultis a series ofamplifiersthat
just don’t break.
DBO BASS-OPTIMIZATION CIRCUIT
provides superior control and adjustability,
compared to traditional bass-boost. DBO is a
2nd order high-pass filter that can be adjusted
between 20Hz and 80Hz. The boost (or Q)
adjustment boosts the signal above the high-
pass filter frequency. Used with a sealed box, it
can help to increase output for more “fun” if
it’s set to about 45Hz. If it’s used with a vented
box, it should be set at or slightly below the
tuned frequency of the box. That will prevent
woofer unloading, and provide more output at
the frequency where the box is tuned and the
woofer’s excursion is minimized – where it can
handle more power.
ONBOARD ELECTRONIC CROSSOVERS
Reference Series amplifiersinclude 2nd order
(12dB/octave) slopes and are continuously
variablefrom 32Hz to 200Hz.
VARIABLE BASS-BOOST
provides up to12dB ofboost at 50Hz in the
Reference Series full-range amplifiers.
DIRECT-CONNECT TERMINALS
eliminate the need for additional solder-on or
crimp-on terminals and provide an easy and
reliable connection for power, ground and
speaker wires.
FULL-RANGE PREAMP OUTPUTS
eliminate the need for signal splitters.
INCLUDED REMOTE LEVEL CONTROL
*
The amount ofbass in popular recordings
differs greatly from track to track. Give your
customer as much control as you see fit with
the RLC. It varies the output of the amplifier
from no output up to the maximum output level
that you setwith the input sensitivity control.
*except 4-channel

amplifiers
© 2008 Harman International Industries, Incorporated.
All rights reserved. Part No. INFREFAMPPI3-08
Features, specifications and appearance are subject to change
without notice. Designed, edited and digitally produced by the
Harman Consumer Group Marketing & Design Center, Woodbury, NY.
Infinity is a trademark of Harman International Industries,
Incorporated, registered in the United States and/or other countries.
250 Crossways Park Drive, Woodbury, NY 11797 USA
516.674.4INF (4463) Fax [phone]
www.infinitysystems.com
475a
4-Channel Full-Range Amplifier
75 Watts RMS x 4 channels at 4 ohms and
≤1% THD + N
Signal-to-noise ratio: 85dBA (reference 1 watt
into 4 ohms)
90 Watts RMS x 4 channels at 2 ohms,
14.4V supply and ≤1% THD + N
180 Watts RMS x 2 channels at 4 ohms,
14.4V supply and ≤1% THD + N
Dynamic power: 117 watts at 2 ohms
Effective damping factor: 6.3 at 4 ohms
Frequency response: 10Hz – 100Hz (–3dB)
Maximum input signal: 6V
Maximum sensitivity: 100mV
12dB built-in variable electronic crossover
Variable bass-boost (0 to +6dB @ 50Hz)
One pair full-range preamp outputs
Port for future accessory products
Dimensions (L x W x H):
14-3/16" x 9" x 2-11/16"
(360mm x 229mm x 68mm)
5350a
5-Channel Amplifier
50 Watts RMS x 4 channels and 150 watts RMS
x 1 channel at 4 ohms and ≤1% THD + N
Signal-to-noise ratio: 85dBA (reference 1 watt
into 4 ohms)
60 Watts x 4 channels, 300 watts x 1 channel
at 2 ohms, 14.4V supply and ≤1% THD + N
Dynamic power: 89 watts x 4 and 332 watts
x 1 at 2 ohms
Effective damping factor: 6.3 at 4 ohms
Frequency response: 10Hz – 100kHz
(channels 1, 2, 3, 4), 10Hz to 302Hz (channel 5)
Maximum input signal: 6V
Maximum sensitivity: 100mV
12dB built-in variable electronic crossover
Variable bass-boost (0 to +6dB @ 50Hz)
Port for future accessoryproducts
Remote bass-level control included
Dimensions (L x W x H):
16-9/16" x 9" x 2-11/16"
(421mm x 229mm x 68mm)
1300a
Mono Subwoofer Amplifier
200 Watts RMS x 1 channel at 4 ohms and
≤1% THD + N
Signal-to-noise ratio: 85dBA (reference 1 watt
into 4 ohms)
300 Watts RMS x 1 channel at 2 ohms,
14.4V supply and ≤1% THD + N
Dynamic power: 342 watts at 2 ohms
Effective damping factor: 6.3 at 4 ohms
Frequency response: 11Hz – 330Hz (–3dB)
Maximum input signal: 6V
Maximum sensitivity: 100mV
12dB built-in variable low-pass electronic crossover
Variable bass-boost (0 to +6dB @ 50Hz)
Port for future accessory products
Remote bass-level control included
One pair full-range preamp outputs
Dimensions: (L x W x H):
14-3/16" x 9" x 2-11/16"
(360mm x 229mm x 68mm)
1600a
Mono Subwoofer Amplifier
400 Watts RMS x 1 channel at 4 ohms and
≤1% THD + N
Signal-to-noise ratio: 85dBA (reference 1 watt
into 4 ohms)
600 Watts RMS x 1 channel at 2 ohms,
14.4V supply and ≤%THD + N
Dynamic power: 894 watts at 2 ohms
Effective damping factor: 6.3 at 4 ohms
Frequency response: 11Hz – 330Hz (–3dB)
Maximum input signal: 6V
Maximum sensitivity: 100mV
12dB built-in variable low-pass electronic crossover
Variable bass-boost (0 to +6dB @ 50Hz)
Port for future accessory products
Remote bass-level control included
One pair full-range preamp outputs
Dimensions (L x W x H):
14-3/16" x 9" x 2-11/16"
(360mm x 229mm x 68mm)