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Riverstone Audio - Tested/Matched Pair (2 Tubes) 7-Pin JAN 5654W Fully-Tested Vacuum Tubes - Upgrade for 6AK5 / 6J1 / 6J1P / EF95 - JAN 5654W Platinum Grade Pair

Riverstone Audio - Tested/Matched Pair (2 Tubes) 7-Pin JAN 5654W Fully-Tested Vacuum Tubes - Upgrade for 6AK5 / 6J1 / 6J1P / EF95 - JAN 5654W Platinum Grade Pair

Q: will this replace 6K4 i bought a headphone amp on here and it list this tube as a replacement for 6K4 so will this work

5654W tubes are not a direct substitute - however, certain hybrid circuits using the Chinese 6K4 tube are designed such that several other 7-pin pentodes can be used as replacements Note that there is also a vintage Western tube that is also refered to as a "6K4 tube:; this tube is a sub-miniature TRIODE and IS NOT a substitute for the Chinese 6K4 tube as they have much different electrical characteristics and physical connections (the vintage US-manufactured 6K4 triode has electrical leads that are soldered to a circuit). The closest Western equivalent to a Chinese-manufactured 6K4 tube is the vintage 6BA6/EF93 pentode. Again, as mentioned earlier, some headphone amps and tube buffers that are available on Amazon have hybrid circuits that allow using several different 7-pin pentode tubes in place of the Chinese 6K4; including 5654/6AK5/6J1 tubes. Before ordering any tube, please check directly with the amp or buffer seller to verify that your particular amp or buffer model can utilize other 7-pin pentode tubes. Best regards, James at RIverstone Audio

Q: Do these riverstone audio - tested/matched pair (2 tubes) 7-pin ge jan 5654w work for my little dot mk1 + and my little dot mk ii as driver tubes ?

Yes, GE JAN 5654W tubes are excellent driver tubes for both the Little Dot mk1+ and Little Dot mk ii headphone amps. We have several of the Little Dot amps in our workshop and have tested these tubes, and many other US as well as Russian tube brands, extensively in both the mk 1+ and mk II; when properly chosen the JAN 5654W consistently rank the highest in terms of sound quality and low noise level. The test parameters we use during a portion of the electrical parameter testing were chosen based on the circuit requirements of the mk 1+ and mk II headphone amps. James at Riverstone Audio

Q: Do these tubes come with all the lettering intact or is the lettering worn off

We only sell vintage tubes that have good quality lettering. We inspect each tube to make certain that the lettering (tube type, manufacturer and date code) is readable on a tube - if it does not meet our requirements we simply do not sell the tube. The lettering will not always be "perfect", but it will generally be in very good condition. As background, the lettering that was used on many vintage US-manufactured tubes was often applied by silk-screen printing, which is less than ideal in regards to abrasion resistance of the lettering during shipping and routine handling. During shipping, surface abrasion, caused by movement of tubes within their boxes can damage to the print. In addition to abrasion during shipping, improper handling and cleaning of tubes can significantly degrade the quality of the 30+ year old lettering on 5654W tubes. To help preserve the lettering on the 5654W tubes we sell, we utilize thick EVA pads to prevent tubes from moving in their boxes. The EVA also helps absorb vibrations and impacts during shipping. We have gone the extra mile to provide good quality tubes, and want to make certain that the tubes you receive are protected from damage during shipment. If you ever receive tubes from Riverstone Audio that you are not completely satisfied with simply contact us for a refund or replacement. James, RIverstone Audio

Product ID: 24322238

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Details

Brand
Riverstone
Material
Glass
Maximum Pressure
7 Bars
Nominal Wall Thickness
1.3 mm
UPC
763769918220
Manufacturer

🎯Matched within 3% for plate current & conductance

🔊Low-noise 7-pin vacuum tubes for pristine audio

🛡️3-year no-nonsense warranty for peace of mind

Frequently Bought Together

Riverstone Audio - Tested/Matched Pair (2 Tubes) 7-Pin JAN 5654W Fully-Tested Vacuum Tubes - Upgrade for 6AK5 / 6J1 / 6J1P / EF95 - JAN 5654W Platinum Grade Pair

Fosi Audio Box X2 Phono Preamp, Mini Stereo Audio Hi-Fi Preamplifier with Gain Gear, Pre-Amplifier for MM Turntable Phonograph and Record Player, with DC 12V Power Supply

Monoprice 1.5ft Premium 2 RCA Plug/2 RCA Plug M/M 22AWG Cable - Black

Description

🎶 Elevate your sound with precision-matched platinum-grade tubes — because your music deserves the best!

RISK FREE UPGRADE - Backed by a 3-year warranty and specialized life & sound tests, upgrade your gear confidently.
AUDIOPHILE GRADE CLARITY - Low-noise JAN 5654W tubes deliver crystal-clear sound, elevating your amplifier’s sonic signature.
MILITARY GRADE RELIABILITY - Built to meet stringent JAN (Joint Army Navy) standards, these tubes guarantee durability and authenticity.
GUARANTEED NOS LEVEL QUALITY - Tested to exceed 4500 micro-mho with plate current above 6.6 mA, promising vintage tube excellence.
PRECISION MATCHED PERFORMANCE - Each pair is matched within 3% for plate current and mutual conductance, ensuring flawless audio consistency.

Riverstone Audio’s Platinum Grade JAN 5654W vacuum tubes are a fully-tested, matched pair designed as premium upgrades for 6AK5, 6J1, and EF95 tube amplifiers. Matched within 3% for plate current and conductance, these low-noise tubes meet NOS-level performance standards with a guaranteed minimum of 4500 micro-mho and 6.6 mA plate current. Manufactured to military-grade JAN specifications and backed by a 3-year warranty, they offer audiophiles a reliable, authentic, and high-fidelity upgrade option.

Specifications

Maximum Pressure	7 Bars
Nominal Wall Thickness	1.3 mm
Material	Glass

Have a Question? See What Others Asked

Do I just plug them in and start playing music or let them burn in for 10 hours first?

will this replace 6K4 i bought a headphone amp on here and it list this tube as a replacement for 6K4 so will this work

Do these riverstone audio - tested/matched pair (2 tubes) 7-pin ge jan 5654w work for my little dot mk1 + and my little dot mk ii as driver tubes ?

Do these tubes come with all the lettering intact or is the lettering worn off

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