(China) -RUBY BRAND Super premium pins high-gain twin triode, an alternative to the . This tube has a short plate format for reduced microphonics and is factory pre-selected for closest tolerances and best performance.
(Slovakia) - JJ BRAND ECC83S is 12AX7 high gain pre-amplifying double triode. Thanks to its design it also peforms with very low noise and microphonics. Harmonically rich, with a detailed low end and a warm high end. (V3-Russia) - High gain preamplifier tube with unique spiral filament which eliminates the filament-to-cathode induced hum common on amps that use AC on the filaments.
(Russia) -ELECTRO-HARMONIX Premium high gain Twin Triode featuring ultra-low microphonics, and a big, warm and very musical soundstage.