Are these a suitable replacement for Chinese 6N1 tubes?

No, the 6N1 tube is a 9-pin dual triode tube. GE 5654 is 7-pin pentodes. They are different types

How do these compare to the Platinum grade riverstone tubes for 6J1s?

Go with the Riverstone. I used the Riverstone and they are way better. Warmer, bigger soundstage, no harshness

Will these work in a fosi T20 mini power amp?

They work great for the T20 and sound much better than the 6J4 tubes that came with it. No doubt

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Fully operational. Shipping worldwide, on schedule.Duty & taxes paid at delivery

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Fosi Audio 7-Pin 5654W Vacuum Tubes for Tube Amplifier Preamplifier- Replace 6AK5 6J1 6J2 6J1P EF95 Fully Matched Pairing Tubes 2PCS

Fosi Audio 7-Pin 5654W Vacuum Tubes for Tube Amplifier Preamplifier- Replace 6AK5 6J1 6J2 6J1P EF95 Fully Matched Pairing Tubes 2PCS

Product ID: 554815104

Details

Brand
Fosi Audio
Item dimensions L x W x H
5.1 x 2.5 x
Manufacturer
Fosi Audio
Mounting Type
Through-Hole
Voltage
220 Volts

⚡Fully matched pair

🎶Natural voice reproduction

🔊Enhanced sound clarity

Description

🎤 Elevate Your Audio Game with Vintage Vibes!

UNLEASH YOUR SOUND - Experience unparalleled clarity and a larger soundstage.
BASS THAT MOVES YOU - Feel the difference with noticeable bass response.
PERFECT COMPATIBILITY - Seamlessly replaces 6AK5, 6J1, and more for hassle-free upgrades.
24 MONTH PEACE OF MIND - Enjoy a worry-free experience with our comprehensive warranty.
MILITARY GRADE QUALITY - Each tube is fully tested and matched for optimal performance.

The Fosi Audio 7-Pin 5654W Vacuum Tubes are a premium replacement for various tube amplifier models, offering enhanced sound clarity, a larger soundstage, and improved bass response. Each pair is military-grade, fully tested, and matched, ensuring top-notch performance. With a 24-month warranty, these tubes are designed for audiophiles seeking to elevate their listening experience.

Specifications

ASIN	B087LXW6RL
Brand Name	Fosi Audio
Customer Reviews	4.6 4.6 out of 5 stars (303)
Item Dimensions	5.1 x 2.5 x 2.5 Centimeters
Manufacturer	Fosi Audio
Material Type	Glass and various metals (including tungsten)
Model Number	5654W
Mounting Type	Through-Hole Mount
Number of Channels	2
Package Type Name	Box
Part Number	5654W Tube-EU
Voltage	220 Volts

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TrustScore 4.5 | 7,300+ reviews

Ayesha M.

The product exactly matches the description. Very satisfied with my purchase.

5 days ago

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Received my product in pristine condition. Great service overall.

1 month ago

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The MOLLE sheath is of exceptional quality. Very happy with my purchase.

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Received my product in pristine condition. Great service overall.

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