Trinity 18 Amp

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Page last updated Aug 11, 2025

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These amps sound and feel like bonafide Marshalls, albeit quieter, with a design “borrowed” from the early Watkins Dominator circuit. The truly exhibit the much sought after, famous Marshall crunch. Marshall 18 Watt amps were built between 1966 and 1968, or so, and only a few hundred were made. The two-channel amplifier does away with negative feedback, allowing the amplifier to run “open loop” or wide band. This is why the 18 Watt sounds full and rich at low or high volume levels. These ‘features of design’ are very much a part of the distinctive tone.