Introducing the Alpine KTA-450 4-Channel Power Pack Amplifier paired with 2x Alpine S2-S69C Next-Generation S-Series 6x9" Component Speakers. The Alpine KTA-450 Power Pack Amplifier is compact yet powerful, measuring just 7” W x 3.5” H x 1.25” D, making it easy to install in tight spaces. With Dynamic Peak Power technology, it offers 45W RMS x 4 at 2 or 4 Ohms, providing a significant power boost. Featuring a Class D amplifier circuit, it ensures high-quality sound reproduction with minimal distortion. The amplifier includes a Power Stacking bracket for convenient mounting options, making it versatile and easy to integrate. Specifications: - Power output: 50W RMS x 4 at 4 Ohms, 45W RMS x 4 at 2 Ohms - Dynamic Peak Power output: 100W RMS x 4 - THD: Less Than 0.2% at 10W into 4 Ohms - S/N Ratio: >85dB at 1W into 4 Ohms - Frequency Response: 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 Pairing with the amplifier, the Alpine S2-S69C Next-Generation S-Series 6x9" Component Speaker Set offers Hi-Res Audio Certification, providing exceptional sound quality up to 40kHz frequency response. Crafted with Poly Propylene, Glass Fiber, and Mica Cone materials, these speakers deliver crisp and accurate audio. The HAMR Surround technology allows for maximum cone movement, producing powerful bass notes. Key features: - Woofer Size: 6x9”, Mid-Range Size: 3”, Tweeter Size: 3/4” - Peak Power: 260W, RMS Power: 85W - Frequency Response: 65Hz - 40kHz (Hi-Res) - Hi-Res Audio Certified - Poly Propylene, Glass Fiber, and Mica Cone Material - High-Amplitude Multi-Roll Surround Upgrade your car audio system with this premium bundle from Alpine, providing exceptional sound quality and performance in a compact and stylish package.