Redback A4861 200W Subwoofer Amplifier Compact Dedicated Subwoofer Amplifier with Adjustable Crossover and Phase Control The Redback A4861 is a compact dedicated subwoofer amplifier designed to add proper low-frequency reinforcement to commercial and installed audio systems. It delivers 200W RMS into 4 ohms and is designed to work with passive subwoofers, including Redback’s own matching models, while remaining flexible enough for other compatible passive subwoofer applications. This is a practical installation-focused amplifier aimed at retail music systems, commercial spaces and distributed audio setups where you want proper bass support without moving into a full separate hi-fi subwoofer electronics stack. 200W Into 4 Ohms Proper low-frequency power for passive subwoofers The A4861 provides 200W RMS at 4 ohms , giving it enough output to drive a passive subwoofer in commercial background music and installed audio systems. It is a compact high-power subwoofer amplifier that can be paired with ceiling or floorstanding passive subwoofers. Retail music systems Fitness and gym audio systems Hospitality and boutique commercial audio Installed 2.1 or full-range background music systems Adjustable Crossover and Phase Control Useful setup tools on the front panel One of the most useful parts of the A4861 is that it includes front-panel adjustment for level , phase and low-pass crossover frequency . an adjustable crossover range of 35Hz to 160Hz and a phase range of 0 to 180 degrees . That matters in the real world because subwoofer integration is rarely “plug it in and magically perfect.” These controls let you better match the subwoofer to the main speakers and the room. Line-Level and Speaker-Level Connectivity Easy to integrate into installed systems The A4861 includes stereo RCA input plus speaker-level input and output , making it relatively easy to insert into a wider range of systems. Redback also notes that the speaker-level output passes through full-band speaker-level audio from the connected amplifier, which helps when building simple 2.1-style systems. Pairing with small stereo amps Adding bass reinforcement to installed systems Commercial distributed audio applications Simple subwoofer integration without a dedicated AV receiver Compact Install-Friendly Format Small enough to tuck away The A4861 is built in a compact tabletop-style chassis, with listed dimensions around 200mm wide, 160mm deep and 47.5mm high . That helps when space is tight or when the amplifier needs to be hidden in cabinetry, behind counters or in equipment areas. System Fit and Buying Advice A power amplifier such as Redback A4861 200W should be chosen around the job it is doing in the system. The processor or preamplifier, speaker layout, rack ventilation and cable plan all matter, and multi-channel systems do not necessarily need the same amplifier on every channel. Key Features Retail music systems Fitness and gym audio systems Hospitality and boutique commercial audio Installed 2.1 or full-range background music systems Pairing with small stereo amps Specifications Specification Details Product Type Subwoofer amplifier Power Output 200W RMS into 4 ohms Inputs Stereo RCA, speaker-level input Outputs Speaker-level output Adjustable Low Pass Crossover 35Hz – 160Hz Phase Range 0 – 180° THD
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