The ZAPCO Harmony Blue Note HB 46 ADSP, also known as the Charlie, is a versatile six-channel digital signal processor that comes with a built-in four-channel Class AB amplifier. This combination allows you to refine your audio signal and power your speakers from a single compact unit, delivering 20 W per channel at 4 ohms or 35 W at 2 ohms, with a maximum output of 70 W per channel. To give you full control over your soundstage, it features a 31-band equalizer and supports adjustments for filters and delays via a PC or mobile application. Connectivity is flexible, offering four high-level inputs and two RCA inputs, while six RCA outputs let you expand your system. You can stream music wirelessly using Bluetooth 5.1 or play high-resolution files like FLAC, APE, and WAV through the integrated USB player. Designed for a straightforward installation, this unit is plug-and-play ready, making it a practical choice for those who want to upgrade their car audio without complex wiring. It suits enthusiasts who enjoy fine-tuning their acoustics through a dedicated app to achieve a balanced and precise listening experience in their vehicle.