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About the Eighty-Eight
The Rogue Audio Eighty-Eight (also called Model 88 or 88 Magnum) is a high-fidelity vacuum tube stereo power amplifier delivering about 60 watts per channel in ultralinear operation, with a user-selectable Triode mode that reduces output to roughly 40 watts per channel for pure triode operation. It is configured from the factory for 8-ohm speaker loads, with internal transformer taps that can be rewired for 4-ohm operation. The standard tube complement is 4 x KT88 output tubes, 4 x 12AU7 (5814 compatible) driver/phase-splitter tubes, and 2 x 12AX7 input tubes. The design uses custom output transformers and a massive, fully regulated power supply to improve dynamics and low-frequency control. The amplifier is noted for its deep soundstage, liquid midrange, smooth highs, and tight bass for a tube design.
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