[A40 Digital Amplifier: Enhance TV sound quality with HDMI(ARC) connectivity for a plug-and-play experience. Excellent Performance Data: Output power reaches an astonishing 165W*2 with THD+N<1% @4Ω2. Features the MERUSTM MA5332MS digital amplifier chip with over-current over-temperature and under-voltage protections. Subwoofer Output (SW OUT): Create a 2.1 home audio system by connecting the A40 to an active subwoofer via RCA cable. Phono Input (PHONO IN): Modernize vintage turntables with the PHONO input interface bridging the gap between tradition and modernity. Volume Independent Infrared Remote Control: Equipped with 4.4mm/6.35mm headphone jacks allowing independent volume control for "headphone output" and "speaker output." EQ Mode: Built-in 8 preset EQ modes including a custom mode for effortless matching with various speakers and music preferences. Customize treble and bass with a 1dB increment range adjustable from -9 to +9dB. 5 Types of Digital Filters: Control the transient response of the signal with digital filters. High-Spec Bluetooth Receiver: Supports LDAC aptX-HD AAC SBC providing a wireless Hi-Fi experience with a transmission bit rate of up to 24bit/96kHz. High-Quality Bluetooth Module: Features a mature Bluetooth receiving solution supporting Bluetooth 5.1.]