Description
Audio Research SD-135 is a high-end solid-state stereo power amplifier built by Audio Research, a respected American audiophile electronics manufacturer. It’s designed to deliver clean, dynamic amplification with the control and finesse demanded by serious hi-fi systems. The SD-135 produces about 130 W per channel into 8 Ω (and around 230 W into 4 Ω), giving it enough output to handle a wide range of loudspeakers with authority and stability. Its frequency response extends far beyond the audible range, and it has a high damping factor for tight speaker control. The amplifier uses high-current output stages and robust circuitry to maintain low distortion and a high signal-to-noise ratio, resulting in transparent, detailed sound with strong dynamics and excellent transient response. Built with quality components and rugged construction, the SD-135 is often described as fast, powerful and musically engaging — making it a sought-after choice for audiophiles looking for both power and fidelity in a solid-state design
