4x Raytheon collo rame placcato nero anni '50 USA 12AU7 ECC82 ~ audio classico

(12au7 ecc82 B749 B329 5814 cv4003 13d5 e82cc 6189 ecc802s 13d4 6211 13d3 6067 5963 cv4068 6158). legendary raytheon usa, revered by audiophiles for their exquisite detail, micro dynamics, tonal transparency, and sub bass.

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