Vacuum Tubes 7-Pin 5654W Upgrade for 6AK5 6J1 6J1P EF95 6k4 replacement tubes
- Regular price
- $21.99 USD
- Sale price
- $21.99 USD
- Regular price
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$21.99 USD
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Each package contains a pair of fully tested and matched military version vintage US-manufactured JAN 5654W vacuum tubes(2 PCS).
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5654W vacuum tubes for T20, P1, P2, Box X2, Box X4 audio devices. Substitute for 7-pin 6AK5/6AK5W/6Zh1P/6J1/6J1P tubes. It can also directly replace WE-403A/403B/EF95 and ordinary 5654.
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Note: Replacing the wrong type of tube may damage your amplifier. If you are not sure this 5645W can be used as a replacement for your audio device, please check with your amplifier manufacturer.
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It has a fuller, wider sound stage. The treble is smoother and the bass is a little bit tighter. And you can hear some details that you did not hear before while more complex music.
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Every package you get goes through our careful packaging. With 18 months warranty. If you have any questions, please feel free to contact us.
Customer Reviews
but they got here!
I connected the Fosi between my AT LP120XUSB table and a Yamaha HTR-5960, not really expecting any difference in the output to the Polk tower speakers and 14" Polk sub, but I was amazed at the difference in output from albums I'd been playing from the 1970's.
Not only was the sound amazing at 45db setting, but I heard things on the tracks I'd never heard before.
I researched tubes for the Fosi and found an upgrade that everyone who bought one raved about. I decided to change them out and I was again pleasantly surprised by the output from the Fosi.
Who knew such a small device could make such a difference in sound?
Definitely deserves a 5 star rating.
So far the "Tubes" sound as if the music is more full and richer....
As was mentioned previously, I also feel these tubes tame the upper frequencies. I like that they are shorter than the stock tubes too. I started to use this preamp after letting it sit for quite some time. I'm using it on a Yamaha R-N303. The receiver has a built-in phono stage but I needed to move my turntable away from the speaker area so I hooked up the Fosi Preamp and I am using a longer RCA cable to the receiver.
I was really surprised how much better this preamp performed. When I saw that there is an "upgrade" for tubes, I decided to give them a try. I'm happy with it.
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