--- product_id: 327990512 title: "Musical Fidelity Tube Amplifier & Preamp Board - 6J1 Vacuum Tube, Headphone Amp Kit" brand: "kuuleyn" price: "€ 44.55" currency: EUR in_stock: true category: "Kuuleyn" url: https://www.desertcart.hr/products/327990512-musical-fidelity-tube-amplifier-and-preamp-board-6j1-vacuum-tube store_origin: HR region: Croatia --- # 12V DC filament power reduces noise drastically 6J1 vacuum tube preamp for warm, rich sound 8x 470μF capacitors for ultra-clean power Musical Fidelity Tube Amplifier & Preamp Board - 6J1 Vacuum Tube, Headphone Amp Kit **Brand:** kuuleyn **Price:** € 44.55 **Availability:** ✅ In Stock ## Summary > 🎶 Elevate your sound game with vintage tube vibes — because your ears deserve the best! ## Quick Answers - **What is this?** Musical Fidelity Tube Amplifier & Preamp Board - 6J1 Vacuum Tube, Headphone Amp Kit by kuuleyn - **How much does it cost?** € 44.55 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.hr](https://www.desertcart.hr/products/327990512-musical-fidelity-tube-amplifier-and-preamp-board-6j1-vacuum-tube) ## 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 deliver pristine, hum-free power supply - • **DIY Audio Mastery:** Assemble your own tube amp kit and own the sound experience - • **Compact & Powerful:** Sleek 5.12 x 3.94 inch PCB design fits any desktop or studio space - • **Pure Analog Warmth:** 6J1 vacuum tube preamp filters digital harshness for soulful audio clarity - • **Plug & Play Simplicity:** Uses standard DC 5.5*2.1 socket and AC 12V transformer for easy setup ## Overview The Musical Fidelity Tube Amplifier & Preamp Board features a 6J1 vacuum tube that enhances audio by filtering digital artifacts, delivering warm and natural sound. Powered by eight 470μF capacitors and a 12V DC filament supply, it ensures a noise-free, clean power system. This DIY kit invites audiophiles to build their own headphone amplifier with easy-to-use components and compact design, perfect for professional and hobbyist sound enthusiasts. ## Description Buy Musical Fidelity Tube Amplifier & Preamp Board - 6J1 Vacuum Tube, Headphone Amp Kit: Amplifiers - desertcart.com ✓ FREE DELIVERY possible on eligible purchases ## Features - 【Funtion】: This vacuum tube amplifier can 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】: The eight 470UF capacitors included in the DIY tube amplifier kit have very clean filtering, and the power system is excellent and noise-free. The filament is powered by DC 12V and needs to be connected in series to reduce noise. - 【Assemble Yourself】: This diy amplifier kit comes in parts so you can assemble them together by yourself, enjoy the process of building your own tube amplifier. - 【Easy To Use】: This vacuum tube amplifier uses a DC 5.5*2.1 socket and an AC 12V transformer. You can also use an AC 12V transformer. No plug is needed, just solder the power cord to the circuit board. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B08Z3C5YXP | | Best Sellers Rank | #169,422 in Electronics ( See Top 100 in Electronics ) #986 in Audio Component Amplifiers | | Brand Name | Kuuleyn | | Customer Reviews | 3.9 3.9 out of 5 stars (47) | | Item Dimensions | 5.12 x 3.94 x 0.98 inches | | Manufacturer | Kuuleyn | | Material Type | PCB, tube bases, and materials of 6J1 tubes | | Maximum Supply Voltage | 12 volts_of_alternating_current | | Minimum Supply Voltage | 12 volts_of_alternating_current | | Model | Kuuleynga4ktp5v7w881 | | Mounting Type | Surface Mount | | Number of Channels | 2 | | Part Number | Kuuleynga4ktp5v7w881 | | Specification Met | FCC | | Supply Current | 0.8 A | | Unit Count | 2 Count | | Voltage | 12 volts_of_alternating_current | ## Product Details - **Item dimensions L x W x H:** 5.12 x 3.94 x 0.98 inches - **Manufacturer:** Kuuleyn - **Maximum Supply Voltage:** 12 volts_of_alternating_current - **Minimum Supply Voltage:** 12 volts_of_alternating_current - **Voltage:** 12 volts_of_alternating_current ## Images ![Musical Fidelity Tube Amplifier & Preamp Board - 6J1 Vacuum Tube, Headphone Amp Kit - 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 ## 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.hr/products/327990512-musical-fidelity-tube-amplifier-and-preamp-board-6j1-vacuum-tube](https://www.desertcart.hr/products/327990512-musical-fidelity-tube-amplifier-and-preamp-board-6j1-vacuum-tube) --- *Product available on Desertcart Croatia* *Store origin: HR* *Last updated: 2026-08-13*