RA500

About the RA500

The Alesis RA500 is a high-performance stereo power amplifier ideal for studio monitors, live sound, and professional audio setups. It delivers 150 watts RMS per channel into 8 ohms in stereo mode and 500 watts RMS into 8 ohms in bridged mono mode, with 250 watts per channel at 4 ohms. The amplifier features a wide frequency response from 10 Hz to 70 kHz, low total harmonic distortion (0.5%), and a high damping factor of 200, ensuring clean, transparent sound reproduction. It incorporates a high-current toroidal transformer for stable output and uses a silent, convection-cooled design to avoid fan noise, making it suitable for quiet studio environments. Connectivity includes balanced XLR, 1/4" TRS, and unbalanced RCA inputs, with heavy-duty dual binding post speaker outputs. Front-panel LED meters provide output level monitoring, and built-in protection guards against overloading and overheating. The RA500 is rack-mountable and weighs approximately 13 kg, with dimensions of 480 x 143 x 272 mm. It is well-regarded for its robust build, reliable performance, and affordability in professional audio contexts.