Alpine KTA-450 4-Channel Power Pack Amplifier with PowerStack Capability The next generation of Power Pack is here! The compact KTA-450 Power Pack Amplifier utilizes Alpine’s exclusive DPP technology for a big power boost in a small space. The KTA-450 measures just 7” W x 3.5” H x 1.25” D. For vehicles that do not have the space for a traditional amplifier, the KTA-450’s small size allows it to be tucked away in hidden areas such as in the glove box or behind the radio. It could even be used in a motorcycle’s saddlebag or on a boat. No Extra Wires! Thanks to the efficient power needs of the DPP technology, the KTA-450 does not require a new power supply wire at the battery, so installation is fast using the supplied radio power wires. In addition, the KTA-450 uses a 22-pin power harness with a recessed design on one side, so the cables can be tucked-in for a cleaner, less-bulky installation. Features: • Compact size, measuring just 7” W x 3.5” H x 1.25” D • Class D amplifier circuit • Dynamic Peak Power (DPP) technology doubles the power during dynamic musical passages • Power Stacking bracket included for mounting to the iLX-W650 7” Mech-less AV Receiver (sold separately) Specifications: • Power output 4-Ohm @ 14.4 Volts: 50 W RMS X 4 • Power output 2-Ohm @ 14.4 Volts: 45 W RMS X 4 • Dynamic Peak Power output 4-Ohm @ 14.4 Volts: 100 W RMS X 4 • Dynamic Peak Power output 2-Ohm @ 14.4 Volts: 100 W RMS X 4 • THD 10 W into 4 Ohms: Less Than 0.2% • THD 10 W into 2 Ohms: Less Than 0.1% • THD Rated Power 4 Ohms: Less Than 0.1% • THD Rated Power 2 Ohms: Less Than 0.1% • S/N Ratio: 1 W into 4 Ohms: >85dB • Frequency Response:+0/-3 dB 15Hz - 50kHz • Input Sensitivity: RCA (0.152 - 2.80V), Speaker (0.33 - 6.05V) • Crossover: Variable HPF/LPF, (OFF/60/80/120Hz) • Weight: 1.3lb In the box: • KTA-450 4-Channel Amplifier • Input/Output/Power Wire Harness • Universal Bracket Set • Cable Tie • Self Tapping Screw • W650 Mounting Brackets