--- product_id: 98405246 title: "New In Box Gain Matched Pair JJ Electronics Tesla 12AX7 ECC83-S Vacuum Tubes" brand: "jj electronic" price: "Rp1737020" currency: IDR in_stock: true reviews_count: 8 category: "Jj Electronic" url: https://www.desertcart.id/products/98405246-new-in-box-gain-matched-pair-jj-electronics-tesla-12ax7 store_origin: ID region: Indonesia --- # High reliability with pre-tested tubes Gain matched pair for sonic precision Crystal-clear mellow sound output New In Box Gain Matched Pair JJ Electronics Tesla 12AX7 ECC83-S Vacuum Tubes **Brand:** jj electronic **Price:** Rp1737020 **Availability:** ✅ In Stock ## Summary > 🎶 Elevate your tone with the power of precision-matched vacuum tubes! ## Quick Answers - **What is this?** New In Box Gain Matched Pair JJ Electronics Tesla 12AX7 ECC83-S Vacuum Tubes by jj electronic - **How much does it cost?** Rp1737020 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.id](https://www.desertcart.id/products/98405246-new-in-box-gain-matched-pair-jj-electronics-tesla-12ax7) ## 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 - • **Enhanced Sound Clarity:** Transforms scratchy tones into smooth, clear melodies - • **Precision Matched Gain:** Ensures consistent, balanced audio performance every time - • **Compact & Durable Design:** 3.5-inch glass and metal construction built to last - • **Plug-and-Play Compatibility:** Exact replacement for Ampeg PF-20T and similar tube amps - • **Premium JJ Electronics Build:** Trusted brand with proven durability and sound quality ## Overview The JJ Electronics Tesla 12AX7 ECC83-S vacuum tubes come as a gain matched pair, designed for reliable, high-fidelity sound in guitar and bass amplifiers like the Ampeg PF-20T. Crafted from durable glass and metal, these tubes deliver clear, mellow audio with consistent performance, backed by a trusted brand and top customer ratings. ## Description New In Box Gain Matched Pair JJ Electronics Tesla 12AX7 ECC83-S Vacuum Tubes Review: Exact replacement set for Ampeg PF-20T - These same JJ's came pre-installed in my new Ampeg PF-20T bass amplifier. They have a good performance record and are considerably less expensive than other brands. I always keep a spare tube set for all my tube gear. The matched gain aspect is not essential since these tubes are cascaded, not parallel, in the PF-20T. But it doesn't hurt, and indicates that the tubes were at least fired up and deemed functional before sale. Review: Great tubes and seller - Excellent tubes... my old tubes were scratchy... my guitar is now clear as a bell... very mellow sound. Shipping was fast... thanks!! ## Features - New In Box Gain Matched Pair JJ Electronics Tesla 12AX7 ECC83-S Vacuum Tubes - Size: 7.05 Ounce (Pack of 1) ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B07MR3DZ1N | | Best Sellers Rank | #4,550 in Musical Instruments ( See Top 100 in Musical Instruments ) #2 in Guitar Amplifier Tubes | | Brand | JJ Electronic | | Brand Name | JJ Electronic | | Color | Transparent | | Customer Reviews | 4.7 out of 5 stars 104 Reviews | | Item Length | 3.5 Inches | | Manufacturer | JJ Electronic | | Material | Glass, Metal | | Material Type | Glass, Metal | | Number of Packs | 1 | | Unit Count | 1.0 Count | ## Product Details - **Brand:** JJ Electronic - **Color:** Transparent - **Item Length:** 3.5 Inches - **Manufacturer:** JJ Electronic - **Material:** Glass, Metal ## Images ![New In Box Gain Matched Pair JJ Electronics Tesla 12AX7 ECC83-S Vacuum Tubes - Image 1](https://m.media-amazon.com/images/I/81bi+m6ryLL.jpg) ## Customer Reviews ### ⭐⭐⭐⭐⭐ Exact replacement set for Ampeg PF-20T *by C***C on January 31, 2026* These same JJ's came pre-installed in my new Ampeg PF-20T bass amplifier. They have a good performance record and are considerably less expensive than other brands. I always keep a spare tube set for all my tube gear. The matched gain aspect is not essential since these tubes are cascaded, not parallel, in the PF-20T. But it doesn't hurt, and indicates that the tubes were at least fired up and deemed functional before sale. ### ⭐⭐⭐⭐⭐ Great tubes and seller *by J***. on November 1, 2025* Excellent tubes... my old tubes were scratchy... my guitar is now clear as a bell... very mellow sound. Shipping was fast... thanks!! ### ⭐⭐⭐⭐⭐ Killer Price with instant results. *by B***0 on February 23, 2024* Im using the JJ's in my Pro-Ject Tube Box s. This is a Phono Pre...FYI. The Tubes instantly woke up my Vinyl Playback. Highs were more distinct with separation. I do hear an increase in low and mid range. I have Gold Lions in my Black Ice Audio Tube amp in my other setup. Im actually leaning towards trying the JJ's. in that setup as well. This is a fun sounding tube that gave my system a nice boost in performance. Id Buy again. Especially at that price. ## Frequently Bought Together - New In Box Gain Matched Pair JJ Electronics Tesla 12AX7 ECC83-S Vacuum Tubes - Pair of JJ EL84/6BQ5 Power Vacuum Tube - JJ Electronics Amplifier Tube (T-12AT7-JJ) --- ## 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.id/products/98405246-new-in-box-gain-matched-pair-jj-electronics-tesla-12ax7](https://www.desertcart.id/products/98405246-new-in-box-gain-matched-pair-jj-electronics-tesla-12ax7) --- *Product available on Desertcart Indonesia* *Store origin: ID* *Last updated: 2026-05-10*