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The TAD 5751 HIGHGRADE is highly recommended for greatly improving the clarity, smoothness, and vintage tone of numerous guitar amplifiers. It provides sufficient gain, making it perfect for high-gain preamps that are missing the classic crunch. For hi-fi preamps and CD players, the TAD 5751 HIGHGRADE lowers the noise floor and produces a sound that is smoother and clearer than many 12AX7 tubes.
All preamp tubes labeled Premium Selected have passed the following tests
Low Noise Test
Microphonic Test
Gain Test
Sonic Tests
Shock Tests
Listening Tests
Balanced Output Test
