Is it works with nfj & fx audio tube 03 preamplifier

It's a great direct replacement for the 6J1 tube. Definitely improves sound quality

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

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Matched Pair (2 Tubes) JAN 5654W Fully-Tested Vacuum Tubes 6J1 / 5654 /6AK5/ EF95 / 6AK5 Tube Replacement

Matched Pair (2 Tubes) JAN 5654W Fully-Tested Vacuum Tubes 6J1 / 5654 /6AK5/ EF95 / 6AK5 Tube Replacement

Product ID: 109787670

Details

Brand
Riverstone
Colour
multicolour
Manufacturer
Material
Glass
Maximum Pressure
7 Bars
Net Quantity
2.0 Count

🎧Low-noise vintage audio upgrade

🔬Matched within 3% plate current & Gm

🛡️2-year warranty & military-grade reliability

€ 135.01

Duties & taxes included

In stock

Sold byAmazon SlovakiaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Slovakia.

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Description

🎶 Elevate your sound with vintage precision — don’t let your rig miss out!

MILITARY GRADE DURABILITY - Ruggedized JAN 5654W tubes built to last with superior quality control and reliability for professional-grade audio setups.
PLUG PLAY COMPATIBILITY - Direct replacement for 7-pin 6J1, 6AK5, EF95 tubes—upgrade your amplifier safely without risking damage.
GUARANTEED NOS LEVEL QUALITY - Each tube tests at or above 4500 micro-mho Gm and 6.6 mA plate current, delivering authentic vintage tube sound.
PRECISION MATCHED PERFORMANCE - Tubes matched within 3% for plate current and mutual conductance, ensuring flawless stereo balance and sonic clarity.
AUDIOPHILE GRADE SOUND UPGRADE - Experience 20-30% enhanced warmth, bass, and treble over stock tubes for a richer, immersive listening experience.

The Riverstone Audio JAN 5654W matched pair vacuum tubes are premium, low-noise 7-pin tubes designed as direct replacements for 6J1, 6AK5, and EF95 types. Matched within 3% for plate current and mutual conductance, these military-grade tubes guarantee NOS-level performance with a minimum of 4500 micro-mho Gm and 6.6 mA plate current. Backed by a 2-year warranty, they deliver enhanced warmth, bass, and treble, making them a top choice for audiophiles seeking reliable, high-fidelity tube upgrades.

Specifications

ASIN	B01BFJDTW0
Best Sellers Rank	#21,796 in Musical Instruments ( See Top 100 in Musical Instruments ) #58 in Amplifier Accessories
Brand	Riverstone Audio
Brand Name	Riverstone Audio
Colour	multicolour
Country of Publication	USA
Customer Reviews	4.8 out of 5 stars 1,873 Reviews
Item Type Name	vacuum tube
Manufacturer	Riverstone_Audio
Manufacturer Warranty Description	no warranty available
Material	Glass
Material Type	Glass
Maximum Pressure	7 Bars
Nominal Wall Thickness	1.3 mm
UPC	763769918220
Unit Count	2.0 Count

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TrustScore 4.5 | 7,300+ reviews

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Smooth transaction and product arrived in perfect condition.

3 weeks ago

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Great price for an authentic product. Fast international shipping too!

3 weeks ago

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€ 135.01

Duties & taxes included

In stock

Sold byAmazon SlovakiaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Slovakia.

Secure transaction

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Meera L.

Smooth transaction and product arrived in perfect condition.

3 weeks ago

Suresh K.

Very impressed with the quality and fast delivery. Will shop here again.

4 days ago

View all Trustpilot reviews