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.
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
