6SN7GT MARCONI SPA 33S30B 5692 B65 13D2 CV1988 ITALY COUPLE VALVE DOUBLE TRIODE AUDIO PREAMPLIFIER SUPER SOUND 100% OK

The 6SN7GT has always been one of the most widely used Double Triodes in audio amplification and preamp circuits. The search for the "old" 6SN7 has always been a "must" and not surprisingly, in fact these tubes have the gift of making the harmonics much more fluent, captivating, detailed and, overall, extremely pleasant than many other more "recent tubes. ". There are various reasons but in particular their constructive and structural quality and also the raw material used for the realization of each of its parts. MARCONI Officine Italia SpA has created wonderful tubes including, here, a PAIR of 6SN7, one of the first productions with an old big logo , actually very rare to find. A 100% guaranteed "used" dated 1955 with obvious signs of aging but given the build quality still in top shape! Extremely neat 24 mm BLACK plate, square-getter based and IDENTICAL code: 163055. 100% tested and beyond, balanced and coupled. Tubes from the 50s, the best ERA of Audio, warm, detailed, enveloping sound.

EQUIVALENT: B65 = 3129_OSW = 6SN7A = 6SN7_DDR = 6Н8М = CV278 = E1606 = OSW3129 = 13D2_Brimar = 6180 = 5692 = 6CC10 = 6N8P = CV1988 = 6SN7W = 6SN7WGTA = 6SN30CUTA Sweden = 6SN30CUTA Standard & Other connections

NB: The silver spot on the head is absolutely normal and original!

Some of the equipment on which this valve is recommended to be used:

- Conrad-Johnson CAV-50 intergrated amp

- Atma-Sphere MA-1 Mk II.2 Amplifier

- Antique Sound Lab AQ1006 Mono Block amps

- CARY AE-3 DJH preamp

- Rogue Metis 2004

- Wright Sound

- CARY SLP-05 preamp

- Antique Sound Lab

- Grant Fidelity (Yaqin) B-283 mkII tube buffer

- Valvet Audio preamp

- Singlepower PPX3-SLAM

- Aesthetix Calypso

- CJ MV55

- Yaqin MS-34C

- Modwright Sony 5400ES

- Oppo / Modwright BDP-95

- VAC Renaissance 30/30 MKIII

- Bottlehead Crack

- Deja Vu Audio Type 45 amp

- Ultraverve

- Wyetech Topaz 572B SET amp