--- product_id: 19570598 title: "Tube Amp Doctor EL34B STR Premium Selected Vacuum Tube, Matched Quad" brand: "tube amp doctor" price: "190643₫" currency: VND in_stock: false reviews_count: 3 url: https://www.desertcart.vn/products/19570598-tube-amp-doctor-el34b-str-premium-selected-vacuum-tube-matched store_origin: VN region: Vietnam --- # Stable cooling grids High-gain dynamic tone 25W Max Plate Watts Tube Amp Doctor EL34B STR Premium Selected Vacuum Tube, Matched Quad **Brand:** tube amp doctor **Price:** 190643₫ **Availability:** ❌ Out of Stock ## Summary > 🎸 Elevate Your Audio Game with the EL34B STR! ## Quick Answers - **What is this?** Tube Amp Doctor EL34B STR Premium Selected Vacuum Tube, Matched Quad by tube amp doctor - **How much does it cost?** 190643₫ with free shipping - **Is it available?** Currently out of stock - **Where can I buy it?** [www.desertcart.vn](https://www.desertcart.vn/products/19570598-tube-amp-doctor-el34b-str-premium-selected-vacuum-tube-matched) ## Best For - tube amp doctor enthusiasts ## Why This Product - Trusted tube amp doctor brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Balanced Harmony:** Achieve a perfect blend of clear highs, powerful mids, and robust bass for a full-spectrum sound. - • **Unleash Your Sound:** Experience the sensational high-gain EL34 tube that redefines your audio landscape. - • **Built for Reliability:** With golden control grids and large cooling grids, expect maximum stability in every performance. - • **Matched Quad Perfection:** Get the ultimate consistency and performance with a matched quad set, ensuring your sound is always on point. - • **Authentic British Remake:** Enjoy the classic tone of the legendary Mullard EL34, now in your setup. ## Overview The Tube Amp Doctor EL34B STR Premium Selected Vacuum Tube is a matched quad of octal power tubes, delivering a maximum plate wattage of 25W. This high-gain tube offers a dynamic tone reminiscent of the classic Mullard EL34, featuring a clear top end, powerful mids, and robust bass. Designed for stability and reliability, it includes golden control grids and large cooling grids, making it an essential upgrade for any serious audio enthusiast. ## Description Octal power tube (Max Plate Watts = 25W)Sensational new high-gain EL34 tube with a very dynamic tone. An authentic remake of the British Mullard EL34. The clear and harmonic open top end allows for great clean tone and at the same time the TAD EL34B-STR offers incredibly powerful mids and equally powerful bass. The golden control grid and especially large cooling grids guarantee maximum stability and reliability. Consequently, this EL34 provides a maximum of gain and dynamic response.Can replace any 6CA7 or KT77.Q: When does a power tube become a Premium Selected power tube? A: All power tubes labeled Premium Selected have passed the following tests: - Plate Current (PC) and Amplification (TC) - Low Noise Test - ## Features - Octal power tube (Max Plate Watts = 25W) - Sensational new high-gain EL34 tube with a very dynamic tone - An authentic remake of the British Mullard EL34 - The clear and harmonic open top end allows for great clean tone and at the same time the TAD EL34B-STR offers incredibly powerful mids and equally powerful bass - The golden control grid and especially large cooling grids guarantee maximum stability and reliability ## Images ![Tube Amp Doctor EL34B STR Premium Selected Vacuum Tube, Matched Quad - Image 1](https://m.media-amazon.com/images/I/61D9IAx0KhL.jpg) ## Questions & Answers **Q: What does "STR" mean ?** A: "STR" stands for "Special Tube Request" and that simply means Tube Amp Doctor had specs in mind that they needed included in this tube. It refers to one or more specs that were required by the manufacturer for this tube. **Q: Are these burned in at 72 hours prior to shipping?** A: Tube Amp Doctor claims that the tubes are burned in at their factory, but the length of time in which they are burned is not specified. **Q: How can these be ordered to fit a Mesa Boogie amp?** A: These tubes measure 4.48" high and 1.41" wide. I would measure the physical space needed in your amp to install these tubes. If your question refers to the ratings of the tubes in the set, Mesa amps work best with middle numbers and when sending tubes, we pull middle numbers for all tube sets unless otherwise requested. ## Customer Reviews ### ⭐⭐⭐⭐⭐ 5.0 out of 5 stars Rock Yo' World! *by P***. on Reviewed in the United States on April 16, 2016* All I can say is 'WOW'. Had a Blackstar HT Stage 100 that lost a tube. Because tubes are typically 'matched' I replaced as a matched set. Once I found the proper bias voltage (and where to measure it), these tubes literally, leaped to life! search you tube for my extremely nerdy video on replacing tubes on the HT 100. Very very very very very happy I decided to stay with the Tube Amp Doctor brand for replacements. ### ⭐⭐⭐⭐⭐ 5.0 out of 5 stars Five Stars *by J***N on Reviewed in the United States on December 9, 2015* Perfect replacement. Easy to change. ### ⭐⭐⭐ 3.0 out of 5 stars Not too bad *by E***N on Reviewed in the United States on October 29, 2016* Not too bad but not as good as Mullards re-issue --- ## 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/19570598-tube-amp-doctor-el34b-str-premium-selected-vacuum-tube-matched](https://www.desertcart.vn/products/19570598-tube-amp-doctor-el34b-str-premium-selected-vacuum-tube-matched) --- *Product available on Desertcart Vietnam* *Store origin: VN* *Last updated: 2026-05-21*