






🎸 Elevate your amp’s soul with the ultimate NOS 6P1P-EV upgrade—because your sound deserves legendary status.
The Riverstone Audio 6P1P-EV NOS vacuum tubes are military-grade, vintage 9-pin beam tetrodes designed as premium upgrades for Chinese and Russian 6P1/6P1P amps. Each pair is meticulously Amplitrex tested and matched within 5% for key electrical parameters, ensuring superior audio fidelity and longevity with an average lifespan of 5000 hours. Less than half of tested tubes meet these Platinum Grade standards, guaranteeing elite performance. Packaged in custom protective 'Tube Cradle' boxes and backed by a 2-year warranty, these tubes deliver a reliable, high-quality upgrade for discerning audiophiles and professionals.
| ASIN | B07LD1FCJ9 |
| Best Sellers Rank | #50,090 in Musical Instruments ( See Top 100 in Musical Instruments ) #223 in Guitar Amplifier Tubes #15,715 in Music Recording Equipment |
| Customer Reviews | 4.4 4.4 out of 5 stars (56) |
| Date First Available | January 16, 2019 |
| Is Discontinued By Manufacturer | Yes |
| Item Weight | 6.4 ounces |
| Item model number | 6P1P-EV (6П1П-ЕВ) - ONE PAIR |
| Package Dimensions | 4.9 x 3.3 x 2.2 inches |
L**E
Tube Rolling
Upgraded my rockville blu tube amp 6P1 with these 6P1P-EV. Sounds much better. Cleaner tones. Richer sound.
S**Z
Great upgrade for Nobsound 6P1 amp
I bought 2 matched pairs of these to use in the Nobsound 6P1 amp, they are a nice upgrade. Frequency response is flatter and improved bass and clarity. + having a matched pairs in a parallel amp is important. I did have to message to seller to unlock the purchase limit to buy 2 pairs, which was a little annoying, but I understand why they have it in place. These really are the best available tubes for that amp and I recommend this upgrade.
S**K
Original Svetlana tubes improve sound of class A amp
the tubes (2 sets) were used to replace Chinese analogs in 2x6.8W stereo class A amp purchased on Amazon. The manufacturer, located in St. Petersburg, Russia, is quite respectable. Moreover, the "EB" suffix means extended life (5000 hours and more) and improved mechanical stability/reliability. The tubes are very likely to be military-grade. It seems that the sound improved. The packaging was very nice and professional.
M**S
Major sound upgrade to Nobsound 6P1 valve amp!!!
Amazing sound upgrade! You think the stock tubes sound great on the Nobsound 6P1 amp? Wait until you try these on for size! Well, I rolled the tubes in my Nobsound because I thought something was wrong with them. The sound started to fade and there were various clicks and pops but I think the tubes weren’t fully run in. Trying these guys out though, the tubes “bloomed” in about three weeks. You’ll know when your tubes are fully run in. My god, the vocals are amazing on valve amps. Listening to the luscious chorus of Beranger’s “Country of Mine” almost made me orgasm. Even Haley Reinheart’s rendition of “falling in love” will make you fall back in love with your music collection. Whether you roll with Meute’s rendition of “you and me”, or the wonderful Piano solo “Hammers” by Nils Fram, these tubes surely wont disappoint.
D**Y
Did not work
Got two separate pairs and neither one works. Even confirmed that it is the correct one for my amp.
R**G
Nicely done!
Very nice job Riverstone Audio! Nicely packaged, love the measured plate current and transconductance values shown for the pairing. Unfortunately in my case the Russian 6P1P tubes caused a significant deadening of the highs compared to my amp's OEM tubes. Had to return. Note to those who have amps with LEDs under the tubes to add color - these tubes are black on the bottom preventing LED lighting from shining through.
A**R
Superior Tubes
If you're looking to upgrade the tubes in your preamp, spend the extra bucks and get these. This company goes above and beyond to provide quality, matched tubes.
E**D
Must-have upgrade for Monoprice 50W Hybrid Tube Amp
Wish I hadn't waited several years to experiment with tube rolling. I just replaced the stock Chinese tubes in the Monoprice 50W Hybrid Tube Amp with these from Riverstone, and there was an immediate and obvious difference in sound quality. Totally blown away. I though maybe different tubes would just be snake oil placebo, but these make the sound so much more transparent, lifelike and 3D. Best sonic upgrade I've ever experience for so little money.
Trustpilot
1 month ago
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