Compact Powerhouse for Home Entertainment and Karaoke When you want power, clarity, and ease of use in one device, your choice is MadBoy® BOOST-404. This digital Bluetooth karaoke amplifier combines 400 watts of output power and versatile connectivity options in a compact body only 36 cm wide. Smaller in size, but big in sound – the perfect choice for home, restaurant, or cottage use. Built for Karaoke Singers BOOST-404 features two microphone inputs on the front panel, a shared volume control, 2-band EQ, and adjustable echo level. In addition, key control lets you fine-tune songs to match your vocal range. The headphone output allows you to practice singing privately without external sound. Versatile Entertainment Center – Much More Than a Karaoke Amplifier MadBoy® BOOST-404 is not just a karaoke device. It’s a complete home entertainment hub, letting you enjoy music, movies, and radio easily and in high quality. Applications and uses: Karaoke amplifier: two microphone inputs, adjustable echo, and key control for perfect vocals. Home theater amplifier: connect your TV via HDMI ARC and enjoy cinema-quality sound. Bluetooth sound system: stream music wirelessly from your phone, tablet, or smart TV. PC sound card (USB): turn your computer into a powerful music or gaming station. FM radio: listen to your favorite stations directly from the amplifier. Analog sources: connect a CD player or turntable via RCA inputs. Multi-room setup: Zone A and Zone B functions allow sound playback in two rooms simultaneously. Easy to Use – All Functions Conveniently Controlled by Remote The included full-function remote control gives you direct access to nearly all settings: change input source, adjust key (KEY ±), bass and treble, echo level, and overall volume – all from the comfort of your sofa. No need to reach the front panel – everything works with a single press of a button. Power and Precision in Every Situation BOOST-404 uses Class-D amplifier technology to deliver powerful and clear sound for up to four passive speakers. Zone A / Zone B management allows flexible audio control in two different areas – for example, the living room and the terrace at the same time. Connections for Every Need HDMI ARC: brings your TV sound directly to the amplifier. Bluetooth 5.0: wireless connection for mobile devices and smart TVs. USB audio input: connect to a PC with a USB cable. Optical Toslink and digital coaxial input: for high-quality digital audio sources. 3 × RCA stereo inputs: for traditional analog sources. FM radio: built-in tuner. Versatile Outputs Zone A and Zone B: terminals for four passive speakers (min. 4 Ω). RCA output: for active speakers or a subwoofer. 3.5 mm headphone output: for private listening. Technical Specifications Digital Bluetooth karaoke amplifier, 400 W output power Class-D amplifier with outputs for four passive speakers Zone A / Zone B area management HDMI ARC input Bluetooth 5.0 audio input (A2DP, AVRCP) USB audio interface for PC connection Optical Toslink and digital coaxial input (S/PDIF, PCM 44.1–48 kHz) 3 × analog stereo RCA inputs FM radio 3.5 mm headphone jack RCA output for active speakers or subwoofer Two microphone inputs with shared volume control, 2-band EQ, and adjustable echo Master volume control and 2-band EQ for music Key control (pitch adjustment) Full-function remote control Package Contents MadBoy® BOOST-404 amplifier Remote control FM radio antenna Bluetooth antenna Power cable User manual
