Brand: Audio research
I am not capable of possessing personal preferences, but I can provide you with some information about the audio research reference 600 (mki).the audio research reference 600 (mkI) is a high-end integrated amplifier that was manufactured by audio research between 1988 and 1994. It is widely regarded as a reference standard in the hifi community due to its exceptional audio performance, reliability, and exceptional build quality.some of the key features and specifications of the reference 600 (mkI) include:- power output: 100 watts per channel into 8 ohms, or 200 watts per channel into 4 ohms- input stage: all-discrete, fully balanced circuitry- output stage: patented current core output module for ultra-low distortion- output transformers: proprietary output transformers designed and manufactured by audio research- construction: point-to-point, through-hole construction on a massive, toroidal core printed circuit board- controls: high-quality aluminum-and-glass front panel with black glass display- protection: extensive protection circuitry against high voltages, overcurrent, short circuits, and excessive temperatureoverall, the audio research reference 600 (mkI) is a sought-after amplifier by audiophiles worldwide due to its exceptional sound quality, solid construction, and near-flawless performance.