Amplifier Tubes: 6J4 Tube Equivalent 6J4P:
6N4P 6Ж4П – 6AU6 Tube Direct Equivalent Upgrade for Chinese 6J4 copies. USSR Manufacture, to the former Russian Military c.1980s Life expectancy: 5000 hrs.
Also available – rare 6S2P Direct Tube Equivalents!
Expect improved tighter and deeper bass, open mid-range and detailed treble, plus better timing & overall cohesion.
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Free BS310 Silicon anti Vibration Dampers! improve feedback noise
Never buy these tubes from an untrusted source.
Vintage tubes can cause serious damage untested. We check all valves extensively within the UK. No lengthy returns or customs duties! *
Single Tube, Matched Pair, Matched Trio, Matched Quad