The TA-900MULTI is a perfect solution for residential as well as commercial installations in restaurants, pubs, shops, conferencing rooms, fitness clubs for both background music and voice playback systems. A single TA-900MULTI amplifier allows to build a cost-effective multi-room audio installation and play different music in each of 4 zones (from 3 inputs) with independent volume and sound control for each, and to broadcast voice messages to selected zones simultaneously. It can be used as part of an expandable ecosystem, allowing users to add additional amplifiers, active subwoofers and speakers to accommodate larger homes or more rooms. High and constant power is delivered by an oversized, audiophile grade toroidal transformer. The TA-900MULTI integrated amplifier offers the finest music performance at this price level and perfect matching with most speakers available in the market. It utilizes advanced materials, state of the art engineering and innovate design by an international team of professional designers. It delivers pure and distortion-limited power as well as rich sound performance with stunning accuracy, soundstage and sensational dynamics. Multi-Room Sound: 4-zone, high-power stereo amplifier, powered by 700W toroidal power transformer, able to drive four pairs of speakers (from 4 to 16?) – a cost-efficient and easy way to deliver sound to many rooms. Each Zone with Independent: source audio input selection (out of 3 onboard), volume and sound (treble / bass) regulations to play individual music at different volume levels in separate rooms. Built-in Microphone Input: with a mixing and echo control is a perfect solution for voice broadcasting to selected zones. USB Input: to quickly and easily play music from a USB flash drive (supports APE / FLAC / MP3 / WAV). MP3 3.5 mm (1/8") Stereo Input: on the front panel to quickly connect a laptop, smartphone or tablet. RCA Stereo Input: at the rear to hook additional equipment like a CD player, radio tuner or other analog devices. Force-air Cooling: is specifically designed for long working time. Independent Preamplifier Output to Each of 4 Zones: for external amplifying or recording device or powered speakers or subwoofer. - 4-Zone high-power stereo amplifier - Power four pairs of speakers (from 4 to 16?) - Power output All zones driven (power per zone): 2x45W RMS 8ohm - Power output One zone driven: 2x85W RMS 8ohm - Each Zone with Independent source audio input selection - Manual volume, treble, bass regulations per zone - Built-in Microphone Input with a mixing and echo control - USB Input - Play from USB flash drive (APE / FLAC / MP3 / WAV) - AUX 3.5 mm (1/8") Stereo Input on the front panel - RCA Stereo Input at the rear - Independent Preamplifier Output to Each of 4 Zones