--- product_id: 3687307 title: "Amplifier Tube (T-ECC803-S-JJ)" brand: "jj electronic" price: "MX$1300" currency: MXN in_stock: true reviews_count: 7 category: "Jj Electronic" url: https://www.desertcart.mx/products/3687307-amplifier-tube-t-ecc803-s-jj store_origin: MX region: Mexico --- # Spiral filament reduces microphonics Rich, full tone & creamy distortion Higher gain with long plates Amplifier Tube (T-ECC803-S-JJ) **Brand:** jj electronic **Price:** MX$1300 **Availability:** ✅ In Stock ## Summary > 🎶 Unlock Legendary Tone & Gain — Your Amp’s New Best Friend! ## Quick Answers - **What is this?** Amplifier Tube (T-ECC803-S-JJ) by jj electronic - **How much does it cost?** MX$1300 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.mx](https://www.desertcart.mx/products/3687307-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 - • **Whisper-Quiet Performance:** Spiral filament technology minimizes noise and microphonics for pristine sound. - • **Versatile Fit for Any Setup:** Seamlessly enhances all 12AX7 applications, making your rig stand out. - • **Proven Legacy, Modern Precision:** Crafted to exacting standards, continuing the Tesla tradition of excellence. - • **Elevate Your Sound with Higher Gain:** Long-plate design boosts amplification for that sought-after punch. - • **Creamy Distortion Meets Crystal Clarity:** Delivers a rich, full-bodied tone perfect for both overdrive and clean channels. ## Overview The JJ Electronics Amplifier Tube (T-ECC803-S-JJ) is a premium long-plate 12AX7 tube designed for superior gain and tonal richness. Featuring spiral filament technology to reduce microphonics, it delivers creamy distortion and clarity across all applications. Manufactured to exacting standards with a legacy rooted in Tesla production, this tube is a top choice for musicians seeking enhanced performance and durability. ## 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 | #39,694 in Musical Instruments ( See Top 100 in Musical Instruments ) #158 in Guitar Amplifier Tubes | | Brand Name | JJ Electronic | | Customer Reviews | 4.2 4.2 out of 5 stars (68) | | Global Trade Identification Number | 00609722126533 | | Item Type Name | Amplifier Tube | | Item Weight | 13.61 g | | Manufacturer | JJ Electronics | | Manufacturer Warranty Description | N/a. | | UPC | 844632064050 609722126533 | | Unit Count | 1.0 Count | ## Product Details - **Brand:** JJ Electronic - **Global Trade Identification Number:** 00609722126533 - **Item Weight:** 13.61 g - **Manufacturer:** JJ Electronics - **UPC:** 844632064050 609722126533 ## Images ![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. --- ## 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.mx/products/3687307-amplifier-tube-t-ecc803-s-jj](https://www.desertcart.mx/products/3687307-amplifier-tube-t-ecc803-s-jj) --- *Product available on Desertcart Mexico* *Store origin: MX* *Last updated: 2026-04-22*