---
product_id: 216095912
title: "Fosi Audio 7-Pin 5654W Tested/Matched Vacuum Tubes Substitute for 6AK5 6J1 6J2 6J1P EF95 Preamplifier Tubes (2PCS)"
brand: "fosi audio"
price: "VT12485"
currency: VUV
in_stock: false
reviews_count: 13
url: https://www.desertcart.vu/products/216095912-fosi-audio-7-pin-5654w-tested-matched-vacuum-tubes-substitute
store_origin: VU
region: Vanuatu
---

# Enhanced natural voice clarity Direct substitute for multiple vintage tubes 7-pin military-grade vacuum tube Fosi Audio 7-Pin 5654W Tested/Matched Vacuum Tubes Substitute for 6AK5 6J1 6J2 6J1P EF95 Preamplifier Tubes (2PCS)

**Brand:** fosi audio
**Price:** VT12485
**Availability:** ❌ Out of Stock

## Summary

> 🎧 Upgrade your sound, own the vibe — don’t let your amp miss out!

## Quick Answers

- **What is this?** Fosi Audio 7-Pin 5654W Tested/Matched Vacuum Tubes Substitute for 6AK5 6J1 6J2 6J1P EF95 Preamplifier Tubes (2PCS) by fosi audio
- **How much does it cost?** VT12485 with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.vu](https://www.desertcart.vu/products/216095912-fosi-audio-7-pin-5654w-tested-matched-vacuum-tubes-substitute)

## Best For

- fosi audio enthusiasts

## Why This Product

- Trusted fosi audio brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Precision Matched Pair:** Each set is rigorously tested and matched for flawless stereo balance.
- • **Elevated Audio Experience:** Experience richer bass, wider soundstage, and crystal-clear vocals that bring your music to life.
- • **Plug & Play Compatibility:** Seamlessly replaces 6AK5, 6J1, EF95, and more—upgrade your amp without hassle.
- • **Carefully Packaged for Safety:** Arrives in secure packaging to protect your investment and ensure peak performance.
- • **Vintage Military-Grade Quality:** Authentic US-manufactured JAN 5654W tubes ensure durability and superior sound fidelity.

## Overview

The Fosi Audio 7-Pin 5654W vacuum tubes are a premium, military-grade matched pair designed as direct substitutes for classic 6AK5, 6J1, and EF95 preamplifier tubes. Engineered for audiophiles and professionals, these tubes deliver enhanced clarity, deeper bass, and a wider soundstage, elevating your vintage or modern amplifier’s performance with effortless plug-and-play compatibility.

## Description

desertcart.com: Fosi Audio 7-Pin 5654W Tested/Matched Vacuum Tubes Substitute for 6AK5 6J1 6J2 6J1P EF95 Preamplifier Tubes (2PCS) : Musical Instruments

Review: Perfect upgrade - Warm sound and elevated the bass
Review: JAN 5654W compared with stock 6K4 in the Fosi Audio P2 headphone amplifier - I thought this review would be easy, either thumbs up or down. This was not the case. I used a WiiM Pro Plus with Spotify Connect as the source. I compared the stock 6k4 tubes that came with the Fosi Audio P2 headphone amplifier with the JAN 5654W tubes matched pair, sold by Fosi Audio. To make tube swapping faster, easier I used 2 of the Fosi Audio P2 amplifiers. The headphones I used for this test were all Sennheiser. HD-497 (32 Ohm): The sound with the 5654 tubes was noticeably better than the 6k4 tubes in most categories. I used a custom WiiM EQ setting with the HD-497 headphones for this test. HD-600 (300 Ohm): The sound was pretty much the same when comparing the 5654 tubes to the stock 6k4 tubes. The HD-600 headphones were harder to drive, needed an estimated +6dB (5654) and +8dB (6k4) compared with the HD-497 headphones. I used the Fosi P2 volume control to match levels. Bass and drums were slightly improved with the stock 6k4, otherwise it was a toss up. Male and female vocals were excellent with both tube types. No WiiM EQ was used with the HD-600. HD-560S (120 Ohm): Bass was slightly better with the 5654 versus the 6k4. Male vocals and upper midrange were slightly improved with the 5654. Female vocals were excellent with both tube types. Guitar sounded better with the 5654. Gain with 5654 was 2dB higher than with 6k4 (I set volume one click stop higher when using the 6k4 to match levels). I used a custom WiiM EQ with the HD-560S for this test. Categories: Bass, Vocals (harmony, male vocals, upper midrange, female vocals), drums, cymbals and guitar (acoustic an electric.) I recommend purchasing two of the Fosi P2 headphone amplifiers if you are going to regularly swap tubes when using different headphones. The tube sockets are mounted directly to the circuit board. The stress of repeatedly replacing the tubes can't be good for the long term life of the P2. Get a tube pin straightener (7 pin miniature); check on the bay.

## Features

- Each package contains a pair of fully tested and matched military version vintage US-manufactured JAN 5654W vacuum tubes(2 PCS)
- Substitute for 7-pin 6AK5/6AK5W/6Zh1P/6J1/6J1P tubes. It can directly replace WE-403A/403B/EF95 and ordinary 5654. And can be used for the device that comes with 6J2/6J3/6J4/6J5/6K5 as a replacement
- 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
- These GE 5654W tubes show you the difference in natural voice reproduction and simple musical. They sound more clear with an emphasis on clarity, larger soundstage, and bass response is more noticeable. Hear the difference, enjoy your music
- Every package you get goes through our careful packaging

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B087LXW6RL |
| Best Sellers Rank | #62,948 in Musical Instruments ( See Top 100 in Musical Instruments ) #279 in Guitar Amplifier Tubes #18,982 in Music Recording Equipment |
| Brand | Fosi Audio |
| Customer Reviews | 4.5 4.5 out of 5 stars (326) |
| Date First Available | April 24, 2020 |
| Item Weight | 1.44 ounces |
| Item dimensions L x W x H | 2 x 1 x 1 inches |
| Item model number | 5654W |
| Manufacturer | Fosi Audio |
| Mounting Type | Surface Mount |
| Number of Channels | 2 |
| Package Type Name | Box |
| Product Dimensions | 2 x 1 x 1 inches |
| Voltage | 220 Volts |

## Product Details

- **Brand:** Fosi Audio
- **Item dimensions L x W x H:** 2 x 1 x 1 inches
- **Manufacturer:** Fosi Audio
- **Mounting Type:** Surface Mount
- **Voltage:** 220 Volts

## Images

![Fosi Audio 7-Pin 5654W Tested/Matched Vacuum Tubes Substitute for 6AK5 6J1 6J2 6J1P EF95 Preamplifier Tubes (2PCS) - Image 1](https://m.media-amazon.com/images/I/61A9hHSGRtL.jpg)
![Fosi Audio 7-Pin 5654W Tested/Matched Vacuum Tubes Substitute for 6AK5 6J1 6J2 6J1P EF95 Preamplifier Tubes (2PCS) - Image 2](https://m.media-amazon.com/images/I/61H3jUfdUgL.jpg)
![Fosi Audio 7-Pin 5654W Tested/Matched Vacuum Tubes Substitute for 6AK5 6J1 6J2 6J1P EF95 Preamplifier Tubes (2PCS) - Image 3](https://m.media-amazon.com/images/I/61SiXH6ntxL.jpg)
![Fosi Audio 7-Pin 5654W Tested/Matched Vacuum Tubes Substitute for 6AK5 6J1 6J2 6J1P EF95 Preamplifier Tubes (2PCS) - Image 4](https://m.media-amazon.com/images/I/61XFqm2zSgL.jpg)
![Fosi Audio 7-Pin 5654W Tested/Matched Vacuum Tubes Substitute for 6AK5 6J1 6J2 6J1P EF95 Preamplifier Tubes (2PCS) - Image 5](https://m.media-amazon.com/images/I/61fkfBdZ3xL.jpg)

## Questions & Answers

**Q: Are these a suitable replacement for Chinese 6N1 tubes?**
A: No, the 6N1 tube is a 9-pin dual triode tube. GE 5654 is 7-pin pentodes. They are different types

**Q: Will these work in a yaqin ms-30l amp?**
A: Yes, these will work.

**Q: How do these compare to the Platinum grade riverstone tubes for 6J1s?**
A: Go with the Riverstone. I used the Riverstone and they are way better.
Warmer, bigger soundstage, no harshness

**Q: Will these work in a fosi T20 mini power amp?**
A: They work great for the T20 and sound much better than the 6J4 tubes that came with it. No doubt

## Customer Reviews

### ⭐⭐⭐⭐⭐ Perfect upgrade
*by V***A on August 16, 2025*

Warm sound and elevated the bass

### ⭐⭐⭐⭐⭐ JAN 5654W compared with stock 6K4 in the Fosi Audio P2 headphone amplifier
*by M***R on May 25, 2024*

I thought this review would be easy, either thumbs up or down. This was not the case. I used a WiiM Pro Plus with Spotify Connect as the source. I compared the stock 6k4 tubes that came with the Fosi Audio P2 headphone amplifier with the JAN 5654W tubes matched pair, sold by Fosi Audio. To make tube swapping faster, easier I used 2 of the Fosi Audio P2 amplifiers. The headphones I used for this test were all Sennheiser. HD-497 (32 Ohm): The sound with the 5654 tubes was noticeably better than the 6k4 tubes in most categories. I used a custom WiiM EQ setting with the HD-497 headphones for this test. HD-600 (300 Ohm): The sound was pretty much the same when comparing the 5654 tubes to the stock 6k4 tubes. The HD-600 headphones were harder to drive, needed an estimated +6dB (5654) and +8dB (6k4) compared with the HD-497 headphones. I used the Fosi P2 volume control to match levels. Bass and drums were slightly improved with the stock 6k4, otherwise it was a toss up. Male and female vocals were excellent with both tube types. No WiiM EQ was used with the HD-600. HD-560S (120 Ohm): Bass was slightly better with the 5654 versus the 6k4. Male vocals and upper midrange were slightly improved with the 5654. Female vocals were excellent with both tube types. Guitar sounded better with the 5654. Gain with 5654 was 2dB higher than with 6k4 (I set volume one click stop higher when using the 6k4 to match levels). I used a custom WiiM EQ with the HD-560S for this test. Categories: Bass, Vocals (harmony, male vocals, upper midrange, female vocals), drums, cymbals and guitar (acoustic an electric.) I recommend purchasing two of the Fosi P2 headphone amplifiers if you are going to regularly swap tubes when using different headphones. The tube sockets are mounted directly to the circuit board. The stress of repeatedly replacing the tubes can't be good for the long term life of the P2. Get a tube pin straightener (7 pin miniature); check on the bay.

### ⭐⭐⭐⭐⭐ They work
*by C***. on October 7, 2023*

Replaced my 6A2 tubes that came with my preamp, I did notice a bass difference just crisper or more controlled, kinda hard to explain. They are not as loud as the 6A2’s, I had to increase my setting on the preamp from 39dB to 42dB for just a little louder volume, if I didn’t have the option on my preamp to increase the dB setting I would have been disappointed with the lower volume. These tubes are also about half the length of the 6A2’s so when installed they only stick out about a half of an inch, I’m leaving them in but they maybe a little bit harder to remove because you have less to grab on to. Overall a good replacement, I do think the 6A2’s are just fine to use also. ***update*** these tubes definitely need some burn in/break in time after 15 hours of use I was able to turn my dB switch back down to 39dB because the volume increases as they burn in. I didn’t notice any more changes from 15 hours to 30 hours so they seem to be good after 15 hours. I didn’t notice any changes in the 6A2’s from right out of the box to 44 hours of use before I replaced them with these. All of the reviews wondering why the box is labeled made in China, Fosi Audio is in China.

## Frequently Bought Together

- Fosi Audio 7-Pin 5654W Tested/Matched Vacuum Tubes Substitute for 6AK5 6J1 6J2 6J1P EF95 Preamplifier Tubes (2PCS)
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*Product available on Desertcart Vanuatu*
*Store origin: VU*
*Last updated: 2026-03-16*