Class D/DirectFET Technology: The Infinity Kappa Five 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.
5-Channel Design: This amplifier is designed to power four full-range speakers and
a subwoofer simultaneously. All five channels are 2Ω stable; at 2Ω the power output
is 75 watts RMS x 4 to the full range channels plus 300 watts RMS to the subwoofer channel.
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 5, 4, or 3 channels.
When bridged, the front and/or rear channel output is 150 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
- 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.
Rear Input Signal Select: set
to 2 CH or 4 CH, based on how many line outputs
from the head unit are feeding the front and rear
Subwoofer Input: 1 pair of RCA
Input Select Switch: set to
INT or EXT, based on whether the head unit has a
discrete subwoofer line output
Input Level: 3 rotary controls
match the level of the preamp input signals for
front, rear, and sub channels; 200mV to 6V
Crossovers: The Kappa Five has 12 dB per octave
crossovers on all the outputs. Each is continuously variable from 32-320 Hz. The
crossover on the sub output is low-pass only. The crossovers on the front and
rear outputs are independently set to low-pass, high-pass, or full range.
- Frequency: 3 rotary controls
set the crossover points for the front, rear, and
sub 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 (the sub channel crossover is always low-pass)
Dynamic Bass Optimization (DBO): The Dynamic Bass Optimizer (DBO)
is used to enhance low frequency reproduction in your vehicle. Conventional bass-boost
circuits only increase bass at a fixed frequency, and cause the amp to consume considerable
power. The DBO allows you to adjust the frequency, as well as the boost level (up to 12dB),
allowing you to fine-tune the bass in your system to optimize performance. The frequency
control also acts as a subsonic filter.
- HP Freq: Rotary
control to set the sub-sonic filter
and boost frequency; 10-80 Hz
- Boost: Rotary
control to set the boost level;
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 4 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 4
Front and Rear Channel Inputs: 2 pair of RCA
inputs.The amp will accept a speaker level signal through
the RCA inputs. A speaker wire to RCA adapter is needed (136XDCLR2S,
Speaker Output: 10 Set screw
terminals (5 pair) for connecting speaker wires;
handles up to 8 gauge; front left, front right,
rear left, rear right, and sub.
Fuses: 2 Slots for 40A fuses