KAPPAFIVE Infinity 50W x 4 + 350W x 1 Class D System Amplifier

Features

• The Kappa Five features a 12dB per octave electronic crossover allowing you to optimize speaker performance based on type and location.  
• Instead of offering a conventional fixed-frequency subsonic filter, Kappa One and Kappa Five provide DBO, a variable subsonic filter with variable boost. This unique circuit protects woofers in vented boxes, conserving power at the lowest frequencies that vented boxes cant reproduce and making that power available for bass boost above the high-pass filters cutoff frequency. Used with woofers in sealed boxes or in infinite baffle configurations, DBO can provide flat response through even the lowest octave and protect your woofers from the mechanical dangers of over-excursion while providing tight, accurate bass.  
• The Kappa Five features a pair of unique input selection switches eliminating the need for Y-adapters and simplify signal connections. 
• Differential Signal Inputs eliminate ground loops that cause engine noise and work with a variety of output configurations. Speaker-level, line-level single-ended and line-level balanced output signals from any source unit can be connected directly to the Kappa amplifiers RCA-type input connectors. High common-mode noise rejection eliminates alternator noise often present on the cars chassis and electrical noise radiated into the signal cables. In a nut shell, common mode noise rejection works by amplifying the difference between the positive and negative leads of each signal input. Since noise is present and identical on both positive and negative, its cancelled by the circuit and all that is left is the music.  
• Smart protection circuitry guards against short circuits in the speaker output leads, under- and over-voltage due to a weak car battery or alternator or a failed voltage regulator in the cars charging system, and protects your speakers in the event of an amplifier failure. Additionally, Kappa amps include thermal protection that never leaves you without your music. Conventional thermal protection circuits shut the amp down completely if it gets too hot. The thermal protection circuit in Kappa amps reduces the output level slightly, reducing the amount of heat generated until the amplifier reaches an optimum temperature. The amp cools itself but the music never stops.  
• The Kappa Five accepts up to 4 AWG power and ground cables using the included 4-gauge terminal adapters.
• Power Output: 50 watts RMS x 4 channel at 4 ohms and 350 watts RMS x 1 at 2 ohms <=1% THD + N
• Signal-to-Noise Ratio: 85dBA (reference 1 watt into 4 ohms)
• Frequency Response (-3dB): 10Hz to 75kHz (-3dB) Full-Range Channels 20Hz to 320Hz (-3dB) Subwoofer Channel
• Effective Damping Factor: 6.3 at 4 ohms
• Maximum Input Signal: 6V
• Maximum Sensitivity: 200mV