---
product_id: 3687307
title: "JJ Electronics Amplifier Tube (T-ECC803-S-JJ)"
brand: "jj electronic"
price: "€ 58.46"
currency: EUR
in_stock: true
reviews_count: 7
category: "Jj Electronic"
url: https://www.desertcart.nl/products/3687307-jj-electronics-amplifier-tube-t-ecc803-s-jj
store_origin: NL
region: Netherlands
---

# Higher gain with long plates Spiral filament reduces microphonics Rich, full tone & creamy distortion JJ Electronics Amplifier Tube (T-ECC803-S-JJ)

**Brand:** jj electronic
**Price:** € 58.46
**Availability:** ✅ In Stock

## Summary

> 🎶 Elevate your amp’s soul with JJ’s legendary tube power!

## Quick Answers

- **What is this?** JJ Electronics Amplifier Tube (T-ECC803-S-JJ) by jj electronic
- **How much does it cost?** € 58.46 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.nl](https://www.desertcart.nl/products/3687307-jj-electronics-amplifier-tube-t-ecc803-s-jj)

## Best For

- jj electronic enthusiasts

## Why This Product

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

## Key Features

- • **Pro-Grade Durability:** Manufactured to exacting standards, ensuring long-lasting reliability and consistent tone.
- • **Unmatched Gain Power:** Long-plate design delivers superior amplification for that next-level sound clarity.
- • **Noise-Free Performance:** Spiral filament technology minimizes microphonics for crystal-clear audio even at high gain.
- • **Versatile Compatibility:** Seamlessly enhances any 12AX7 application, perfect for both clean and overdrive channels.
- • **Creamy Distortion, Rich Tone:** Experience lush, full-bodied warmth that elevates every note in your 12AX7 setup.

## Overview

The JJ Electronics ECC803 is a premium long-plate 12AX7 amplifier tube known for its higher gain, rich tonal warmth, and creamy distortion. Featuring spiral filament technology to reduce microphonics, it delivers clear, noise-free sound and robust performance. Manufactured to exacting standards and favored by professionals, this tube enhances both clean and overdrive channels across all 12AX7 applications.

## Description

The jj ECC803 is a long-plate version of the standard 12AX7, the longer plates give the tube higher gain, it has a rich and full tone with creamy distortion that does well in any 12AX7 application. Spiral Filament for reduced microphonics. Jj tubes are known for known for their high quality, durability, and their excellence in tone, formerly produced by Tesla, jj tubes are still made to exacting standards, they work well in all applications.

Review: These tubes dont get enough love!!! - I was a little bit apprehensive at first when trying these tubes because of the price, but it was totally worth it. I play a Vox AC4HW and it totally brought this amp to life. I was actually considering selling the amp before I put these tubes in. Previously I had a newer set of JJ 12AX7's in there, which I thought sounded good, and they were by no means bad, just not there. These ECC803S's just added a fidelity, clarity, more chime and robustness to my notes that scratched my itch. I'm no longer selling this amp. Both overdrive and cleans sound great, I play an Epiphone casino with Gibson p90's and a standard telecaster. Both sound phenomenal through this amp. All in all, I'm super happy, these tubes don't​ get enough love and praise. A lot of guys have reported using this tube in the V1 position, which I did try, but personally preferred both tubes in my V1 and V2 positions. Enjoy these tubes, they are worth the price.
Review: super fat, and super loud - I've been a fan of JJ preamp tubes for a while now; it was them that fully weaned me off the idea that NOS is always better. In particular, JJ's spiral filaments lead to an occasionally miraculous reduction in noise. That feature is somewhat obviated by the brutally high gain on this tube, but if you've got a properly shielded guitar with properly wired humbuckers and you're not standing 2 inches away from your speakers, it still sounds pretty surprisingly quiet. Even the best vintage tubes I have still get parasitic oscillation at extreme levels, and this one is completely clear even when it's pushed far past levels I'd actually use. The gain is extreme. My clean channel has gone from sparkling to crunchy, and my OD channel has grown a new set of teeth. I can still dial the guitar volume back to get clean, warm, and rich. Compared to the ordinary JJ ECC83 the sound is much more thick and saturated, but it is noisier. For my style of music, that's acceptable. I haven't yet tried to put it into my V2 slot so it only affects the drive and not the clean, but it has my clean sound like what I want it to sound like. I don't think I'm going back to regular 12AX7s.

## Features

- The jj ECC803 is a long-plate version of the standard 12AX7,
- The longer plates give the tube higher gain
- It has a rich and full tone with creamy distortion that does well in any 12AX7 application. Spiral Filament
- Formerly produced by tesla, jj tubes are still made to exacting standards,
- They work well in all applications

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0041OU1X2 |
| Best Sellers Rank | #46,374 in Musical Instruments ( See Top 100 in Musical Instruments ) #193 in Guitar Amplifier Tubes |
| Customer Reviews | 4.2 4.2 out of 5 stars (68) |
| Date First Available | August 31, 2009 |
| Is Discontinued By Manufacturer | No |
| Item Weight | 0.48 ounces |
| Item model number | T-ECC803-S-JJ |
| Product Dimensions | 2.5 x 1 x 1 inches |

## Product Details

- **Brand:** JJ Electronic
- **Global Trade Identification Number:** 00609722126533
- **Item Weight:** 13.61 g
- **Manufacturer:** JJ Electronics
- **UPC:** 844632064050 609722126533

## Images

![JJ Electronics Amplifier Tube (T-ECC803-S-JJ) - Image 1](https://m.media-amazon.com/images/I/51O5QPMcdFL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ These tubes dont get enough love!!!
*by J***N on December 2, 2014*

I was a little bit apprehensive at first when trying these tubes because of the price, but it was totally worth it. I play a Vox AC4HW and it totally brought this amp to life. I was actually considering selling the amp before I put these tubes in. Previously I had a newer set of JJ 12AX7's in there, which I thought sounded good, and they were by no means bad, just not there. These ECC803S's just added a fidelity, clarity, more chime and robustness to my notes that scratched my itch. I'm no longer selling this amp. Both overdrive and cleans sound great, I play an Epiphone casino with Gibson p90's and a standard telecaster. Both sound phenomenal through this amp. All in all, I'm super happy, these tubes don't​ get enough love and praise. A lot of guys have reported using this tube in the V1 position, which I did try, but personally preferred both tubes in my V1 and V2 positions. Enjoy these tubes, they are worth the price.

### ⭐⭐⭐⭐⭐ super fat, and super loud
*by C***N on November 26, 2014*

I've been a fan of JJ preamp tubes for a while now; it was them that fully weaned me off the idea that NOS is always better. In particular, JJ's spiral filaments lead to an occasionally miraculous reduction in noise. That feature is somewhat obviated by the brutally high gain on this tube, but if you've got a properly shielded guitar with properly wired humbuckers and you're not standing 2 inches away from your speakers, it still sounds pretty surprisingly quiet. Even the best vintage tubes I have still get parasitic oscillation at extreme levels, and this one is completely clear even when it's pushed far past levels I'd actually use. The gain is extreme. My clean channel has gone from sparkling to crunchy, and my OD channel has grown a new set of teeth. I can still dial the guitar volume back to get clean, warm, and rich. Compared to the ordinary JJ ECC83 the sound is much more thick and saturated, but it is noisier. For my style of music, that's acceptable. I haven't yet tried to put it into my V2 slot so it only affects the drive and not the clean, but it has my clean sound like what I want it to sound like. I don't think I'm going back to regular 12AX7s.

### ⭐⭐⭐⭐⭐ Great tube!!
*by M***N on December 19, 2018*

I bought this to replace the (failing) phase inverter tube in my Fender Super Champ X2. Ideally, you want a tube where both halves (triodes) are tested and found to be "Balanced" when using any preamp tube for the phase inverter position. The stock tube I purchased from Amazon is working very well, even without 3rd party testing and "Balanced" declaration. This is my 2nd JJ 803S phase inverter tube for this Super Champ. The first one I purchased was the Gold pin version and it lasted almost a year before the amp started cutting out. This amp is very hard on phase inverter tubes. The stock GT from the factory didn't last 6 months. I replaced the factory power tubes (GT-6V6) with JJ 6V6s and biased them to factory specifications, 40mV. I highly recommend the JJ 803S as the replacement tube for phase inverter position for any amp that uses a standard 12AX7 in that position.

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*Product available on Desertcart Netherlands*
*Store origin: NL*
*Last updated: 2026-03-18*