Audio Research Classic 120 monoblocks fitted with a fresh set of GE 6550 valves As the model name suggests, this is another classic amp from Audio Research. Like the Classic 60 we just sold, the Classic 120 is like the mono version of the Classic 60 but with more power. The Classic 60 was rated at 60W while the Classic 120 is good for 110W. Each monoblock amp still utilizes eight 6550 tubes but with two 6CG7 driver tubes (four in total when accounting for both monoblocks just like the Classic 60). Like the Classic 60, the Classic 120 is equally robust sounding with a rich texture in the mid-range sections and warm sweet highs. The big difference is the 110W offered which allows wider speaker matching and a broader bandwidth over the Classic 60 both amps serviced a few years ago and sounding fantastic.
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