---
product_id: 1299428
title: "Blues Jr. / Pro Jr. JJ Tube Upgrade Kit (2x EL84, 3x 12AX7)"
brand: "coocheer"
price: "6259156₫"
currency: VND
in_stock: true
url: https://www.desertcart.vn/products/1299428-blues-jr-pro-jr-jj-tube-upgrade-kit-2x-el84
store_origin: VN
region: Vietnam
---

# Apex Matched 2x EL84 3x 12AX7 Blues Jr. / Pro Jr. JJ Tube Upgrade Kit (2x EL84, 3x 12AX7)

**Brand:** coocheer
**Price:** 6259156₫
**Availability:** ✅ In Stock

## Summary

> 🎶 Unleash Your Amp's True Potential!

## Quick Answers

- **What is this?** Blues Jr. / Pro Jr. JJ Tube Upgrade Kit (2x EL84, 3x 12AX7) by coocheer
- **How much does it cost?** 6259156₫ with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.vn](https://www.desertcart.vn/products/1299428-blues-jr-pro-jr-jj-tube-upgrade-kit-2x-el84)

## Best For

- coocheer enthusiasts

## Why This Product

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

## Key Features

- • **Easy Installation:** Quick and hassle-free setup to get you playing faster.
- • **Enhanced Dynamics:** Experience richer tones and improved responsiveness in your music.
- • **Elevate Your Sound:** Transform your amp with premium tubes for unmatched clarity.
- • **Precision Engineering:** Enjoy the reliability of Apex Matched tubes for consistent performance.
- • **Versatile Compatibility:** Designed to fit Blues Jr. and Pro Jr. models seamlessly.

## Overview

The Blues Jr. / Pro Jr. JJ Tube Upgrade Kit includes two T-EL84-JJ tubes and three T-12AX7-S-JJ tubes, all Apex Matched for optimal performance. This kit is designed to enhance the sound quality and reliability of your amplifier, making it a must-have for any serious musician.

## Description

Blues Jr. / Pro Jr. JJ Tube Upgrade Kit (2x EL84, 3x 12AX7)

## Features

- (3) T-12AX7-S-JJ
- (1) T-EL84-JJ-MP (Apex Matched), which includes:(2) T-EL84-JJ

## Images

![Blues Jr. / Pro Jr. JJ Tube Upgrade Kit (2x EL84, 3x 12AX7) - Image 1](https://m.media-amazon.com/images/I/71ebOnfI2wL.jpg)

## Questions & Answers

**Q: Will this set work in a vox ac15?**
A: If your amp requires 3x12AX7's and 2x EL84's then this set will work perfectly.

**Q: Who or what is tesla?  this was previously listed as a jj set, now it says jj/tesla.**
A: Nikola Tesla was an inventor, electrical engineer, mechanical engineer best known for his contributions to the design of modern alternating current. How JJ co-opted his name is unknown to me.  As for the tubes I am not a fan.  I tried them several times in different amps and beyond those suffering infant mortality (nearly immediate failure) I found them to be short lived overall.  I pretty much stick with TAD (Tube Amp Doctor) tubes these days. They sound good and the failure rate is very low.  Strictly my opinion, but I hope it helps you with your decision.

**Q: this set fits on a laney cub 12r?**
A: Yes

**Q: Will these work for a blues junior 1?**
A: They work and still do, a 12AX7was bad, so bought a set ans have new extras, different valve/tubes. they work fine

## Frequently Bought Together

- Blues Jr. / Pro Jr. JJ Tube Upgrade Kit (2x EL84, 3x 12AX7)
- JJ Electronics Amplifier Tube (T-12AT7-JJ)
- 12AX7 / ECC83 - JJ Electronics, Pin Type: Regular, package of 4

---

## Why Shop on Desertcart?

- 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016
- 🌍 **Shop Globally** — Access 737+ million products across 21 categories
- 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price
- 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members)
- 🔒 **Secure Payments** — Trusted payment options with buyer protection
- ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews

**Shop now:** [https://www.desertcart.vn/products/1299428-blues-jr-pro-jr-jj-tube-upgrade-kit-2x-el84](https://www.desertcart.vn/products/1299428-blues-jr-pro-jr-jj-tube-upgrade-kit-2x-el84)

---

*Product available on Desertcart Vietnam*
*Store origin: VN*
*Last updated: 2026-01-25*