from $289
The Audio-Technica ACX-300.4 is a robust 4-channel amplifier designed for all-weather performance. Delivering 4 x 50 watts RMS at 4 ohms or 4 x 75 watts RMS at 2 ohms, this amplifier features a selectable 12 dB/octave Linkwitz-Riley crossover and boasts an IPX6 rating for protection against powerful water jets. With a wide frequency response of 26 Hz – 22 kHz and a high signal-to-noise ratio of 106 dBA, it provides clear and powerful audio for various outdoor and challenging environments.
Match your amplifier's power output (Watts RMS) to your speakers' sensitivity and impedance (Ohms). Do not obsess over astronomical peak wattage claims; RMS is the true measure of sustained power. Available from $289.
Amplifiers have practically zero ongoing costs aside from electricity, which is highly variable based on usage volume and class type (Class A uses more power than Class D). Good amplifiers can last decades with proper care. Consumables are virtually non-existent unless using tube amps.
Common Failure Modes
Solid-state amplifiers are extremely reliable. Failures usually stem from blown capacitors, overheated output transistors, or physical wear on volume potentiometers. Proper ventilation prevents 90% of heat-related failures.
Match your amplifier's power output (Watts RMS) to your speakers' sensitivity and impedance (Ohms). Do not obsess over astronomical peak wattage claims; RMS is the true measure of sustained power. Class D amplifiers run cool and are compact, while Class A/B offer traditional warm sound at the expense of heat and size.
Solid-state amplifiers can last 20+ years. Capacitors may eventually dry out and need replacement.
The Audio Control All Weather 4-Channel Amplifier is available at abt, starting at $289.
Amplifiers have practically zero ongoing costs aside from electricity, which is highly variable based on usage volume and class type (Class A uses more power than Class D). Good amplifiers can last decades with proper care. Consumables are virtually non-existent unless using tube amps.
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