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Features
Controls
Connections
Features
Class D/DirectFET Technology: The Infinity Kappa Four features
high-power Class D circuit topology with DirectFET transistors, a design that
increases power output and overall efficiency, with improved heat transfer from
the transistors to the chassis.
CEA-2006 Compliance: The specifications given by Infinity for the
Kappa Five comply with the 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.
4-Channel Design: This amplifier is designed to power four full-range
speakers. All four channels are 2Ω stable; at 2Ω the power output is
150 watts RMS x 4. CEA-2006 compliance is maintained at 2Ω, with less than
1% THD+N. The amplifier's front and rear channels are individually bridgeable,
so the Kappa Five can run 4, 3, or 2 channels. When bridged, the front and/or
rear channel output is 300 watts RMS into 4Ω.
Protection Circuitry: The amp features protection circuits
and will shut itself down in the following cases:
- DC Output: DC voltage is
detected on the amplifier output
- Over/Under Voltage: Voltage
at the +12V (Battery) terminal is too high or too
low
- Short Circuit: Short circuit
in speaker or speaker wire
Non-Stop Thermal Protection: Kappa amps protect themselves against
excess heat with circuits that cool the amplifier down by gradually reducing output,
instead of shutting down completely.
Status LEDs: Three LEDs on top of the chassis indicate the status
of the amplifier. Two Power LEDs indicate the amplifier is on. The Protection LED indicates
one of the protection circuits has engaged.
Controls
Front Input Select:
-
Front/Rear: choose
which inputs feed this side of the amp
(no Y-adapters needed when using only
one input)
-
Stereo/Left/Right: choose
stereo, or which channel is output when this
side of the amp is bridged
Rear Input Select:
-
Front/Rear: choose
which inputs feed this side of the amp
(no Y-adapters needed when using only
one input)
-
Stereo/Left/Right: choose
stereo, or which channel is output when this
side of the amp is bridged
Input Level: 2 rotary controls
match the level of the preamp input signals for
front and rear channels; 200mV to 6V.
Crossovers: The Kappa Four has independent 12 dB per octave crossovers
on the front and rear outputs. Each is continuously variable from 32-320 Hz and selectable;
low-pass, high-pass, or full range.
- Frequency: 2 rotary controls
set the crossover points for the front and rear
channels; continuously variable from 32-320 Hz.
- Crossover Switches: 2 switches set
the front and rear crossovers to low-pass, high-pass, or
full range.
Bass Boost: The Bass Boost control allows you to enhance the
bass output from the rear channels; 0 to 12 dB at 50Hz.
Connections
Power: A 4-Gauge terminal
adapter is installed on the power/ground/remote
terminals; if removed, it reveals three 8 gauge
set screw terminals (Infinity recommends 4 gauge
power and ground when the power cable is more
than 4 feet)
- +12V: Set screw
terminal for power wire from battery;
handles up to 2 gauge wire
- Remote: Set screw
terminal for remote turn-on lead; handles
up to 12 gauge wire
- Ground: Set screw
terminal for ground; handles up to 2
gauge wire
Front and Rear Channel Inputs: 2 pairs of RCA
inputs. The amp will accept a speaker level signal through
the RCA inputs. A speaker wire to RCA adapter is needed (136XDCLR2S,
sold separately).
Speaker Output: 8 set screw
terminals (4 pair) for connecting speaker wires;
handles up to 8 gauge; front left, front right,
rear left, and rear right.
Fuses: 2 Slots for 40A fuses
(installed).
