---
product_id: 61630507
title: "4 x EL34 (6CA7) Valves (Tubes) JJ Matched Quad NEW TESTED"
brand: "ampvalves"
price: "$302.34"
currency: USD
in_stock: true
reviews_count: 3
url: https://www.desertcart.us/products/61630507-4-x-el34-6ca7-valves-tubes-jj-matched-quad-new
store_origin: US
region: United States of America
---

# 4 x EL34 (6CA7) Valves (Tubes) JJ Matched Quad NEW TESTED

**Brand:** ampvalves
**Price:** $302.34
**Availability:** ✅ In Stock

## Quick Answers

- **What is this?** 4 x EL34 (6CA7) Valves (Tubes) JJ Matched Quad NEW TESTED by ampvalves
- **How much does it cost?** $302.34 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/products/61630507-4-x-el34-6ca7-valves-tubes-jj-matched-quad-new)

## Best For

- ampvalves enthusiasts

## Why This Product

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

## Description

4 x EL34 (6CA7) Valves (Tubes) JJ Matched Quad NEW TESTED

## Features

- Awesome tone - the number one priority for any guitarist has to be the tone of the amplifier. Warm, rich, fat and juicy are the words that best describe the sound from these valves.
- Sustained valve power to make the most of every stage in the amplifier chain. It is the balance between volume and tone that distinguishes a great valve from a mediocre valve.
- Long valve life - guitar amps by their very nature have to be built to take a lot of knocks and robustness is particularly important when it comes to the amplifier valves themselves.
- Restore the original power, clarity and sparkle to your guitar amplifier with a brand new replacement valve kit. Treat yourself to new set of valves today.
- ›See more product details

## Images

![4 x EL34 (6CA7) Valves (Tubes) JJ Matched Quad NEW TESTED - Image 1](https://images-na.ssl-images-amazon.com/images/I/717OT422vML.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ 







  
  
    Fast delivery, well packed, good tubes - well matched, reasonable price, sound nice.
  

*by R***S on Reviewed in the United Kingdom on 13 September 2019*

Not that much choice out there for tubes these days but JJ got good reviews so I tried a set in my Marshall bass head. These were well packed and arrived quickly. I bought a matched set since the amp is 100w with 4 x EL34 outputs. Being a tech I measured the anode current for each valve to check the matching whilst I set the negative bias to around 33mA and the matching was pretty good - 31 to 35. The result sounded as good as ever. I also change the  3 pre-amp valves for JJ ones. Overall happy with the make of valves and the supplier.

### ⭐⭐⭐⭐⭐ 







  
  
    Performed as expected.
  

*by R***3 on Reviewed in the United Kingdom on 21 July 2019*

They were easy to fit and worked as expected. I am unable to comment on the finer points of operation of these tubes as I don't have the necessary experience.

### ⭐⭐⭐⭐⭐ 







  
  
    Does the job
  

*by L***E on Reviewed in the United Kingdom on 2 August 2018*

I installed these in my Marshall JVM 410h the other day after my previous set of EL34's fitted by Marshall gave up the ghost. So far they're working fine and sound just as good as my previous set of EL34's. No complaints here.

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*Product available on Desertcart United States of America*
*Store origin: US*
*Last updated: 2026-03-20*