Introducing the Alpine KTA-450 4-Channel Power Pack Amplifier, a compact powerhouse that packs a punch with Dynamic Peak Power of 45W RMS x 4 at 2 Or 4 Ohms. Measuring at just 7” W x 3.5” H x 1.25” D, this amplifier is perfect for small spaces like glove boxes, motorcycles, or boats. The KTA-450 features Class D amplifier circuitry and DPP technology that doubles power during dynamic musical passages. It comes with a Power Stacking bracket for easy mounting to the iLX-W650 7” Mech-less AV Receiver (sold separately). With a range of specifications like a THD of less than 0.2% and a frequency response of 15Hz - 50kHz, the KTA-450 ensures top-notch audio performance. The package includes the KTA-450 4-Channel Amplifier, Input/Output/Power Wire Harness, Universal Bracket Set, Cable Tie, Self Tapping Screw, and W650 Mounting Brackets for a complete installation solution. Pair the amplifier with the Alpine R2-S65 6.5" R-Series High-Resolution Coaxial Speakers for an exceptional audio experience. These speakers are tuned to deliver powerful, distortion-free sound with a focus on high- and low-end frequencies. The 2-Way Coaxial R2-S65 model features a glass-fiber reinforced cone for fast response and accurate music reproduction. With a peak power of 300 Watts and RMS power of 100 Watts, these speakers provide a vibrant sound experience. The R-Series speakers are Hi-Res Audio certified with a frequency response up to 40kHz, making them ideal for audiophiles seeking premium sound quality. The package includes 16.5cm Door Woofer (2pcs) with Integrated Coax Hard-Dome Tweeters, Composite Baskets, Glass-Fiber Reinforced Cone, Integrated X-Over Networks, and Speaker Grills for a complete speaker setup. Upgrade your audio system with the Alpine KTA-450 4-Channel Power Pack Amplifier and R2-S65 6.5" R-Series Coaxial Speakers for a superior listening experience.