Rare 1965 GoldPin 7308 Sylvania USA E188CC SmoothLiquidDetail 6922 E88CC Sub

Top sonic echelon gold pin sylvania are rare limited runs, featuring the best metallurgy of the tube era. This sought after hard to find 1965 production is silky smooth, incredibly detailed, and a flat natural mid-band response. Neutral uncolored vocal harmonics, and vinyl style warmth, combined w/ realistic live-concert definition and transparency.

The sound stage is tall, musical, expansive, and reveals more bass articulation than 6922 editions, w/ a more rugged low-end. The liquid tonality, low-noise floor, and premium build quality, all contribute to the collectible lore of vintage sylvania tubes. Similar to e188cc, 7308 microphonics are also improved w/ less noise db, more overall power, and long 10k hour life time. Military issue 1965, featuring mission critical screening for industrial grade applications, great upgrade for any 6dj8 circuit.

Whether its a tube mic, preamp, stereo, or mono block 6922/cca/e88cc swap, this sonic classic is sure to please. Old stock military edition 7308 by sylvania usa, rare gold pin 1965 production w/ sylvania box included. + complimentary refurbish and deoxit process, one of a kind value-added quality control.

Full mutual conductance gm test, pristine balance 114/113 % gm (65 % min good). Our high power gm output test applies up to 250v, more than many other testers.

+ useful life test pass (longetivity indicator) +. Give several sessions (up to 150+ hours) w/ your amps voltage to fully cure / break-in. Authentic vintage hifidelity audio / mic / power / preamp tube curation by caliacoustics.

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