4 YEAR WARRANTY From riverstoneaudio USA – BUY WITH CONFIDENCE – All vintage vacuum tubes sold by Riverstone Audio are backed by our no-nonsense 4-YEAR warranty. THE BEST WARRANTY AVAILABLE in the audio tube business. We have been testing and using vacuum tubes for many years and know what it takes to select the best vacuum tubes for long life low-noise audio applications.
TESTED and MATCHED Pair (2 tubes) of low-noise 7-Pin NIB/NOS GE JAN 5654W Vacuum Tubes. Considered one of the best of the 5654 / 6AK5 / EF95 family of tubes for audio use. These vintage US manufactured GE tubes are Mil. Spec. (JAN) Electron Tubes – Higher Durability and Life. The 5654W tubes are NOS and were obtained from factory-sealed military surplus boxes.
RIVERSTONE AUDIO utilizes the best available equipment (Amplitrex AT1000) to test and match audio tubes. THE VACUUM TUBES WE SELL ARE 100% TESTED WITH DOCUMENTED TEST RESULTS ATTACHED TO EACH TUBE BOX. Our experienced engineers match vacuum tubes for BOTH plate current and mutual conductance. All tubes we must also pass a specialized life test and an audio sound test. ***All vacuum tubes sold by Riverstone Audio will have the Riverstone Audio name, logo and QC label on the boxes***
TEST RESULTS ARE PROVIDED WITH ALL TUBES SOLD BY RIVERSTONE AUDIO. We do not recommend purchasing vintage vacuum tubes unless actual test results are provided. We reject over 60% of the tubes we test. We guarantee that the GE 5654W tubes selected for these matched pairs test at NOS levels at or above 4400 micro-mho and a plate current of 6.2 mA or higher.
***IMPORTANT*** AMPLIFIER DAMAGE CAN OCCUR IF YOU SUBSTITUTE THE WRONG TYPE OF TUBE. 5654W tubes should only be used to replace 7-Pin 6J1, 6J1P / 6J1P-EB / 6Zh1P-EV, 6AK5, 6AK5W and EF95 tubes. DO NOT SUBSTITUTE FOR ANY OTHER TYPE OF 7-pin tube.
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