--- product_id: 635216293 title: "Vacuum Electron Tube Valve Preamp Amplifier Board Headphone Amp Parts Musical Fidelity Kit, 6J1 Audio Tube Headphone Amplifier, Compact Electronic DIY Kit DIY Parts (Static Bag)" brand: "kuuleyn" price: "VT14077" currency: VUV in_stock: true reviews_count: 5 category: "Kuuleyn" url: https://www.desertcart.vu/products/635216293-vacuum-electron-tube-valve-preamp-amplifier-board-headphone-amp-parts store_origin: VU region: Vanuatu --- # 6J1 vacuum tube preamp for warm analog sound 8x 470µF capacitors for ultra-clean power DIY assembly kit for hands-on customization Vacuum Electron Tube Valve Preamp Amplifier Board Headphone Amp Parts Musical Fidelity Kit, 6J1 Audio Tube Headphone Amplifier, Compact Electronic DIY Kit DIY Parts (Static Bag) **Brand:** kuuleyn **Price:** VT14077 **Availability:** ✅ In Stock ## Summary > 🎧 Elevate your sound game with vintage tube vibes and zero noise! ## Quick Answers - **What is this?** Vacuum Electron Tube Valve Preamp Amplifier Board Headphone Amp Parts Musical Fidelity Kit, 6J1 Audio Tube Headphone Amplifier, Compact Electronic DIY Kit DIY Parts (Static Bag) by kuuleyn - **How much does it cost?** VT14077 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.vu](https://www.desertcart.vu/products/635216293-vacuum-electron-tube-valve-preamp-amplifier-board-headphone-amp-parts) ## Best For - kuuleyn enthusiasts ## Why This Product - Trusted kuuleyn brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Noise-Free Power:** Eight 470µF capacitors create a hum-free, ultra-stable power supply. - • **Pure Analog Warmth:** 6J1 vacuum tube preamp filters digital harshness for rich, natural audio. - • **High-Frequency Clarity:** Electrodeless electrolytic coupling capacitors ensure crisp, low-distortion sound. - • **Plug & Play Flexibility:** Supports DC 5.5*2.1 socket or direct AC 12V transformer wiring for versatile setups. - • **Build Your Own Audio Legacy:** Complete DIY kit with all parts included—perfect for audiophile tinkerers craving hands-on mastery. ## Overview This compact 6J1 vacuum tube headphone amplifier DIY kit features eight 470µF capacitors for clean power, electrodeless coupling capacitors for high-frequency clarity, and supports flexible power input options. Designed for stereo 2.0 setups, it enables audiophiles and DIY enthusiasts to build a warm, analog preamp that filters digital harshness and delivers rich, natural sound with minimal noise. ## Description Features: 【Great for】Connect the 6J1 tube pre-amp between sound source and amplifier, it will effectively filter digital flavor, the music and human voice will be relatively good. 【Function】Eight 470UF capacitor filter is very clean, excellent power system to no hum, filaments are powered with DC 12V and need to be connected in series in order to reduce noise. 【Practical】Coupling capacitor is electrodeless electrolytic capacitor with high frequency and low resistance. 【Portable】Using DC 5.5*2.1 socket and AC 12V transformer, you can also use AC 12V transformer without plug, just need to weld the power cord onto the circuit board. 【Application】This kit comes in parts so you can assemble them together by yourself, enjoy the process of building your own tube amplifier. Specifications: Type: 6J1 tube (substitution model 6AK5, 6AU6, 5654 etc.) Channel Types: 2.0 / stereo Voltage & Current: AC12V 0.8A or above Power Interface: 5.5 * 2.5 plug Circuit Board Size: 77 x 75mm / 3.03 x 2.95" Package Includes: 1 x PCB Board 1 x 2W 2.2Ω Metal Film Resistor 6 x 1N4007 Large Current Diodes 6 x 4.7K Resistors 2 x 1K Resistors 4 x 47Ω Resistors 2 x 2.2K Resistors 2 x 470K Resistors 2 x 100K Resistors 2 x 200Ω Resistors 9 x 50V 470UF Capacitors 4 x 50V 1UF Monolithic Ceramic Capacitors 2 x D667 Transistors 2 x B647 Transistors 1 x 50K Potentiometer 2 x 3mm Blue LED 1 x DC005 Power Connector 2 x Tube Base 2 x 6J1 Tubes 2 x Base 1 set x Standoff and Screws 1 x Potentiometer Cap Review: Came with all components, glass tubes intact, works great. Was hard to find a cheap 12VAC power supply but I found a 750mA one for five bucks and it works fine. The flashing RGB LEDs make cool interference sounds. I am using this for guitar, intentionally trying to get distortion, so I don't care about audio quality. It sounds and works great for that though! Doesn't fit the other clear plastic case I found, some minor drilling fixed that though. Review: Outstanding! My love for kit building started in 1963, when I was young and out to prove that a woman could do anything. Not being overly domestic, I quickly developed a love for soldering. I've soldered on stained glass...built an Heathkit stereo FM receiver, a small FM radio, and now this pre-amp. It took a day to build this pre-amp, and the end result is awesome. Coupled with an inexpensive amp I bought from desertcart and a couple of small speakers, the sound is amazing!!! Although there were no instructions, the pcb was well marked so no written instructions were needed. If you're looking for a fun project, I highly recommend buying this kit. You won't be disappointed. ## Features - 【Funtion】Connect the 6J1 tube pre-amp between sound source and amplifier, it will effectively filter digital flavor, the music and human voice will be relatively good - 【Eight 470uf Capacitor Filter】Eight 470UF capacitor filter is very clean, excellent power system to no hum, filaments are powered with DC 12V and need to be connected in series in order to reduce noise - 【High Frequency And Low Proof】A coupling capacitor is an electrodeless electrolytic capacitor with high frequency and low proof - 【Easy To Use】Using DC 5.5*2.1 socket and AC 12V transformer, you can also use AC 12V transformer without a plug, just need to weld the power cord onto the circuit board - 【Can Yourself Assemble Them】This kit comes in parts so you can assemble them together by yourself, enjoy the process of building your own tube amplifier ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B08Z3C5YXP | | Item model number | Kuuleynga4ktp5v7w881 | | Manufacturer | Kuuleyn | | Product Dimensions | 13 x 10 x 2.5 cm; 82 g | ## Product Details - **Item dimensions L x W x H:** 13 x 10 x 2.5 centimeters - **Manufacturer:** Kuuleyn - **Maximum supply voltage:** 12 Volts - **Minimum supply voltage:** 12 Volts - **Voltage:** 12 Volts (AC) ## Images ![Vacuum Electron Tube Valve Preamp Amplifier Board Headphone Amp Parts Musical Fidelity Kit, 6J1 Audio Tube Headphone Amplifier, Compact Electronic DIY Kit DIY Parts (Static Bag) - Image 1](https://m.media-amazon.com/images/I/71JVI4O9v3L.jpg) ## Questions & Answers **Q: Does this come with the acrylic case shown in the photos?** A: No, acrylic case not included ## Customer Reviews ### ⭐⭐⭐⭐⭐ Review *by A***N on 1 December 2025* Came with all components, glass tubes intact, works great. Was hard to find a cheap 12VAC power supply but I found a 750mA one for five bucks and it works fine. The flashing RGB LEDs make cool interference sounds. I am using this for guitar, intentionally trying to get distortion, so I don't care about audio quality. It sounds and works great for that though! Doesn't fit the other clear plastic case I found, some minor drilling fixed that though. ### ⭐⭐⭐⭐⭐ Review *by M***Y on 30 April 2025* Outstanding! My love for kit building started in 1963, when I was young and out to prove that a woman could do anything. Not being overly domestic, I quickly developed a love for soldering. I've soldered on stained glass...built an Heathkit stereo FM receiver, a small FM radio, and now this pre-amp. It took a day to build this pre-amp, and the end result is awesome. Coupled with an inexpensive amp I bought from Amazon and a couple of small speakers, the sound is amazing!!! Although there were no instructions, the pcb was well marked so no written instructions were needed. If you're looking for a fun project, I highly recommend buying this kit. You won't be disappointed. ### ⭐⭐⭐⭐ Review *by J***W on 5 November 2023* First off the plastic case is sold separately which was a slight bummer. I did end up buying one. I tried running it initially off DC 12v which is what most power adapters are. Was quiet and distorted. Figured out I needed 12v AC and got the correct adapter and it worked. The 2 best cheap mods I have found: Either replacing R14 and R19 with 100ohm resistors or just soldering a 220 ohm resistor on the underside of those supplied two resistors. This slightly opens up the sound stage and raises the volume some. Replacing C10 and C12 with 10uf caps or just bridging the originals with 10uf caps does really help the bass response like another review said. Also getting a matched pair of GE tubes helps improve the sound over the cheap ones supplied. This will cost you about as much as the kit though. With a nice set of headphones this little preamp does sound quite good. That resistor mod to R14/R19 really helped give the volume I wanted on my headphones. They are 40ohm speakers and I doubt you would get near the needed volume on any headphones of much higher resistance. ## Frequently Bought Together - Tube Amplifier Kit, DIY Tube Preamp Kit, Tube Preamp, DIY Amplifier Kit, 6j1 Vacuum Electron Tube Valve Preamp Tube Amplifie Board Headphone Amp Parts Musical Fidelity Kit DIY Electronic Kits - Enclosure Protection Parts Kit Tube Preamp Box, Vacuum Tube Preamp Box, for 6J1 Valve Preamp Board --- ## 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.vu/products/635216293-vacuum-electron-tube-valve-preamp-amplifier-board-headphone-amp-parts](https://www.desertcart.vu/products/635216293-vacuum-electron-tube-valve-preamp-amplifier-board-headphone-amp-parts) --- *Product available on Desertcart Vanuatu* *Store origin: VU* *Last updated: 2026-05-07*