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About the Phi 220
The Valve Amplification Company Phi 220 is a high-power tube monoblock power amplifier from VAC's Phi series, designed for demanding high-end loudspeakers including difficult electrostatic and planar loads. It is rated at 220 watts in mono with output transformer taps accommodating a wide range of speaker impedances. Like other Phi-series amplifiers, it uses KT88 output tubes with octal 6SN7/5692 small-signal tubes, employs very low or no global negative feedback, and is voiced for a fast, vivid, and highly dimensional presentation. The Phi 220 features separate external power supplies and a high-quality dual-choke, pi-filter high-voltage supply, reflecting VAC's emphasis on wide bandwidth and stability under difficult loads. VAC recommends using carefully matched output tube sets for best performance and longevity. The Phi 220 appeared in VAC's lineup in the early to mid 2000s and is no longer part of VAC's current production range, but it remains a respected legacy model among owners and dealers.
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