Inputs and Outputs Notes
Class D Amplifier: The XM-ZZR3301
amplifier is a Class D mono amp. Class D technology is a method to convert
and amplify music signals with MOSFETs to high-speed pulse signals. Class D amps
feature high efficiency and low heat generation.
Active Thermal Control: The ZZR3301 has an Active Thermal control which regulates the unit's operating temperature for stable, long-term playback at high volumes.
This amplifier has 3-way protection circuitry which protects the amplifier in
the following cases:
- Thermal: Turns the amp
off when the operating temperature is too high
- Short Circuit: Turns
the amp off when the speaker outputs are short-circuited
- DC Offset: Turns the
amp off when a DC current is generated
Dynamic Distortion Suppressor: The Dynamic Distortion Suppressor suppresses distortion that occurs at higher playback levels for clear bass reproduction.
amplifier has an LED strip on the top panel that glows blue when the amp
is on. There is also an LED on the front panel that lights in green when the amp is on and red when the protection circuit is activated.
Low-pass Filter: The XM-ZZR3301
is equipped with a low-pass filter, continuously variable from 50-300 Hz, with a
slope of 12 dB/octave. It is constantly active (cannot be switched off).
Subsonic Filter: The amp has a built-in subsonic filter, which eliminates extremely low frequencies which can rob power and cause damage to the speakers. The subsonic filter is variable
between 6 and 70 Hz, with a slope of 12 dB per octave. Like the low-pass filter, the subsonic filter is constantly active.
Bass Boost: For added low
frequency performance, the amplifier has a bass boost
centered at 40 Hz, variable from 0 to 10 dB.
Terminal Cover: The XM-ZZR3301
comes with a rubber protective cap that slips over the power wire terminal strip to
help prevent accidental short circuiting.
Inputs and Outputs
Speaker Outputs: Although this
is a mono amplifier, there are screw terminals for two speakers (each terminal
is 0.35" wide). They are not stereo outputs, but summed (L+R) mono, and
internally wired in parallel. If you connect two 4-ohm speakers to the amp, the
amplifier will see a 2-ohm load.
Power/Ground Terminals: The
power and ground screw terminals are 0.54" wide to easily accommodate 4-gauge
Remote Terminal: The remote
turn on screw terminal is 0.35" wide. Note: If you are connecting the amplifier to a head unit that does not have a remote output, and the speaker-level input harness is used, the
connection to the remote terminal does not need to be made. The amplifier will turn on when a high-level input signal is detected.
Speaker-level Input Harness:
The amp comes with a speaker-level input harness with a 4-pin Molex plug. This allows you to easily connect the amplifier to a factory radio or
a receiver without preamp outputs.
Preamp Output: This amplifier
includes a stereo preamp output, which allows you to send an unfiltered signal
to another amplifier. Note that you
must be using the line level input, not the speaker-level input, in order to use
the preamp output jacks.
CEA-2006 Compliance: The
specifications given by Sony for the XM-ZZR3301 amplifier comply with the new
CEA-2006 Amplifier Power Standard from the CEA (Consumer Electronics
Association). All manufacturers who comply with the standard can display the
CEA-2006 logo on their product.
Minimum Impedance: The amplifier's minimum impedance is 2