CEA 2006 Compliant: The
ZX650.4's power and signal to noise ratio ratings are measured according to the
strict standards dictated by the Consumer Electronics Association (CEA). These
standards allow you to accurately compare the output ratings of all CEA
2006-compliant amplifiers, even if they come from different brands.
Manufacturers who adhere to the standards can display the CEA 2006 logo on their
products and packaging. The manual lists two signal to noise ratios:
- CEA 2006 compliant: 91 dB
- At rated Power: 95 dB
Kicker "Livin' Loud" Certified
Power Certificate: The amplifier comes with a certificate that indicates the
total maximum wattage of the particular amplifier, along with the model number,
serial number, tested date, and whether the amplifier passed the total harmonic
distortion, signal-to-noise ratio, and protection circuit tests.
Dual Input Sensitivity Differential RCA Inputs: The ZX650.4 has
pairs of RCA inputs which will receive either high or low level signals from your
car stereo. The unit has an input level switch that allows you to select a low-
or high-level input. A low-level signal from the stereo's preamp output is
recommended. If the stereo lacks preamp outputs, you can use the unit's
speaker-level outputs by attaching RCA plugs onto the speaker wire, and set the
input level switch to "HI". Note: Both inputs must receive the
same type of input signals. The input level switch controls both sets of inputs.
Auto Turn-on Selection: The ZX-series offers three different automatic
turn-on modes that can be selected on the end panel. You can select from the
- Remote Turn-on: You can connect an 18-gauge wire from the remote
turn-on lead from your source unit to the REM terminal on the amplifier.
This is the preferred turn-on method.
- DC Offset Turn-on: The DC offset mode detects a 6-volt surge from
the high-level speaker outputs when the source unit is turned on. If remote
turn-on is not an option, this is the next best choice.
- Signal Sense Turn-on: This method detects the incoming audio
signal from your source unit and automatically turns on the amp. This method
will not work properly if the input gain control is not set properly.
Protection Circuitry: The ZX650.4's protection circuitry guards against accidents
and undesired operation. The amp is protected by thermal protection, voltage
protection, and short circuit protection. The Power LED on the left side of the amp glows green
and the power indicator on top of the amp glows red when the amplifier is
connected correctly and the protection has not been engaged. If the red Protection LED
illuminates, the amp's protection circuit has been engaged and the amplifier is in protect mode until
the problem is resolved.
Optional ZX-Series End Caps: You can add the optional ZX-series
amplifier end caps (2068ZXEC,
sold separately) to this amplifier. These plastic end caps cover
the wire terminals and controls located on the ends of the amp for a clean
installation. When installed, the end caps add approximately 2-5/8" to the
overall width of the amplifier.
Crossover: The ZX650.4 has two internal crossovers that can
be independently set for high-pass or low-pass operation, or turned off for
full-range operation. When engaged, the crossovers are continually variable from
50 to 200 Hz. The filters
have a slope of 12dB per octave.
Fader Button: You can connect one or two pairs of input cables to the
amplifier. If only one pair of inputs is available, the amp's Fader button
allows you to feed signals to all four channels from the single input pair. In
this case, the fader of the source unit will not affect the output of the
amplifier. If two pairs of inputs are available, the amp's Fader button should
be pushed in (Off Position), allowing you to use the fader of the source unit to
control the front to rear volume of the amplifier.
KICKEQ Bass Boost: The ZX650.4's KICKEQ bass boost circuit provides
a variable 0-18dB signal boost at 40Hz. You can independently apply bass boost
to the front (Amp 1) and back channels (Amp 2).
Left Side of Amplifier:
- +12V (power):
gold-plated set screw terminal (accepts up to 2 gauge wire)
- REM (remote turn-on):
gold-plated set screw terminal (accepts up to 8 gauge wire)
- GND (ground): gold-plated
screw set terminal (accepts up to 2 gauge wire)
- Fuse: two 40-amp fuses
Right Side of Amplifier:
- Auto Turn-on Selection: 3-way switch (+12V, DC Offset, Audio)
- Input Level Switch: 2-way push button (out=Low, in=High)
- Fader Button: 2-way push button (out=On, in=Off)
- Speaker Outputs:
4 pairs of
gold-plated set screw terminals (accepts up to 8 gauge wire)
- RCA Inputs: Two sets of gold-plated RCA
input jacks (Amp 1 and Amp 2)
- Crossover: Two 3-way switches (Off, High, Low)
Amp Wiring Kit:
It is recommended that a 4-gauge amp wiring kit with this amplifier.
Our Product Research Team
At Crutchfield, you'll get detailed, accurate information that's hard to find elsewhere. That's because we have our own in-house Product Research team. They verify what’s in the box, check the owner's manual, and record dimensions, features and specs. We stay on top of new products and technologies to help people make informed choices.