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The Mesa Boogie 6L6 STR 448 Tubes are a testament to power and clarity. Carefully hand-tested and matched for superior performance, these tubes provide that unmistakable richness and resonance associated with Mesa's high-quality sound. They deliver a robust low-end and crystal-clear highs, contributing to an overall balanced tone. Ideal for guitarists seeking to revitalize their amplifiers, the 6L6 STR 448 tubes offer a noteworthy upgrade, helping you achieve that classic Mesa Boogie tonal excellence. Install these tubes and prepare to be enveloped in a sea of vibrant, warm, and compelling sound.