The Quad 606 is a solid-state power amplifier designed for delivering high-quality audio performance. It was part of Quad's amplifiers series and is favored for its reliability and clean sound reproduction. The design features a Class AB operation, which allows the amplifier to optimize both efficiency and sound quality. The unit typically delivers a power output of 140 watts per channel into an 8-ohm load, making it suitable for a wide range of speakers. The circuit design includes various protections against overheating and short circuits, ensuring safe operation under demanding conditions. It has a low total harmonic distortion (THD) figure, contributing to its transparent sound character. The chassis is often built robustly with a minimalist aesthetic, featuring a heat sink layout that promotes effective cooling. Inputs commonly include RCA connectors, and the amplifier includes speaker binding posts that can accommodate different types of cables. The Quad 606's performance is complemented by a good damping factor, allowing it to control speaker movement effectively, resulting in tight bass and accurate reproduction of audio.

The Quad 606 is a solid-state power amplifier designed for delivering high-quality audio performance. It was part of Quad's amplifiers series and is favored for its reliability and clean sound reproduction. The design features a Class AB operation, which allows the amplifier to optimize both efficiency and sound quality. The unit typically delivers a power output of 140 watts per channel into an 8-ohm load, making it suitable for a wide range of speakers. The circuit design includes various protections against overheating and short circuits, ensuring safe operation under demanding conditions. It has a low total harmonic distortion (THD) figure, contributing to its transparent sound character. The chassis is often built robustly with a minimalist aesthetic, featuring a heat sink layout that promotes effective cooling. Inputs commonly include RCA connectors, and the amplifier includes speaker binding posts that can accommodate different types of cables. The Quad 606's performance is complemented by a good damping factor, allowing it to control speaker movement effectively, resulting in tight bass and accurate reproduction of audio.