I bought these tubes as a replacement for the tubes supplied with the little dot 1 amp. are they suitable? do i need to change any jumper settings?

No just change the VALVES. Bit better than originals.

Would these tubes be suitable for the nobsound hifi 6j2 vacuum tube preamplifier?

I got mine for an FX Audio preamp a very similar unit I think. They were a great replacement for the Chinese originals. Hope this helps.

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Pair (2 Tubes) 7 Pin GE Jan 5654W Fully-Tested Vacuum Tubes 5654/6 Ak5/6J1/6J1p/Ef95 Audio Amplifier Electron Tube Upgrade - 5654W Platinum Grade Pair

Pair (2 Tubes) 7 Pin GE Jan 5654W Fully-Tested Vacuum Tubes 5654/6 Ak5/6J1/6J1p/Ef95 Audio Amplifier Electron Tube Upgrade - 5654W Platinum Grade Pair

Product ID: 151262828

Details

Brand
Riverstone
Colour
Silver
Item length
1 Inches
Manufacturer
GE
Material
Glass
Maximum pressure
7 Bars

🔋4500+ μmho NOS-level gain

⚖️Matched <3% plate current & Gm

🛡️Military-grade durability

Description

🎶 Elevate your audio game with platinum-grade precision – don’t let your amp settle for less!

NOS LEVEL PERFORMANCE - Guaranteed 4500+ micro-mho gain and 6.6mA plate current for vintage tube purity and clarity.
DIRECT DROP IN UPGRADE - Seamlessly replace 6J1, 6AK5, EF95 tubes without risking damage—upgrade your sound with confidence.
PRECISION MATCHED PAIR - Experience sonic harmony with tubes matched under 3% variance for flawless audio fidelity.
BACKED BY 3 YEAR WARRANTY - Invest in premium audio with peace of mind from Riverstone Audio’s trusted warranty and support.
HEAVY DUTY MILITARY GRADE - Built to last with rigorous quality control ensuring reliability and longevity in your amplifier.

This pair of GE Jan 5654W vacuum tubes offers audiophiles a premium, military-grade upgrade for 7-pin amplifiers. Each tube is meticulously tested and matched within 3% for plate current and mutual conductance, guaranteeing NOS-level performance with 4500+ micro-mho gain and 6.6mA plate current. Designed as a direct replacement for 6J1, 6AK5, and EF95 tubes, these platinum-grade tubes deliver low noise, enhanced reliability, and a warm, subtle tonal upgrade backed by a 3-year warranty.

Specifications

ASIN	B01BFJDTW0
Best Sellers Rank	54,969 in Musical Instruments & DJ ( See Top 100 in Musical Instruments & DJ ) 265 in Amplifier Accessories
Brand	Riverstone Audio
Colour	Silver
Customer Reviews	4.8 4.8 out of 5 stars (1,867)
Item Length	1 Inches
Item Type Name	vacuum tube
Manufacturer	GE
Material	Glass
Maximum Pressure	7 Bars
Nominal Wall Thickness	1.3 mm
UPC	763769918220
Unit Count	2.0 count

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