• RMS Power Handling @ 4 Ohms: 90 Watts RMS Power Handling @ 2 Ohms: 45 Watts.
• Frequency response: 20-20,000 Hz.
• Class D Amplifier.

Powerful things do come in small packages!Add higher output and more dynamic response with this easy-to-install Universal Power Pack upgrade. The KTP-445U Universal Power Pack amplifies both an aftermarket or factory installed head unit power output, resulting up to a 150 percent power increase over the original power from the head unit's built-in amplifier.Overview45 Watts x 4 @ 4Ω/2Ω90 Watts x 2 @ 4Ω BridgedFor aftermarket and factory installed systemsCompact sizeEasy Installation and FlexibilityCompactCompact size lets the KTP-445U fit where most amplifiers won’t. The KTP-445U comes equipped with the RCA and Auto-Sensing-Speaker level connectors and it fits behind the head unit in the dash of most vehicles. It's small and compact at only 7-7/16” x 1-1/2” x 2-1/2”. The size and flexible wires make the Power Pack an easy choice to save space.Independent Filters for Rear & Front InputsHigh-Pass selectable switches for Front & Rear allow frequency filtering for a wide variety of speakers. Choose from full range to selectable range: 60Hz, 80Hz or 120Hz to fine-tune your crossover points.Configurable InputsNeed configurable options for Speaker-Level or RCA inputs to the Power Pack? On the bottom panel of the Power Pack there are selectable input options to accommodate Speaker-Level (0.5V-10V) or RCA (0.2V – 4V) inputs. Selectable 2 Channel and 4 Channel options give you the control to determine source inputs, and can eliminate the need for Y-adapters.Accessible Front & Rear GainsThe Power Pack provides simple variable gain controls on the end panel for flexibility and a wide variety of system applications.Best Signal-to-Noise Contender In Its ClassIn order to ensure that Alpine sound quality is heard at your ears, we’ve created a platform that offers an unbelievably low noise floor, taking extra care to ensure a clean signal path, with no extraneous interference.