GU-50 Tube Amplifier — Rare Vintage Push-Pull Hi-End Amp • 2×50W RMS • Handmade Ukraine

🔷 GU-50 Tube Amplifier — Rare Vintage Push-Pull Hi-End Amp • 2×50W RMS • Handmade in Ukraine • Williamson Circuit

🎙️ The Time That Plays
This isn't just an amplifier — it's a musical instrument in itself.
Handcrafted around the legendary GU-50 power pentodes and built on the classic Williamson circuit, this amplifier delivers rich analog warmth, outstanding headroom, and pristine tonal balance. The VU meters glow softly, and the sound fills the room with depth, clarity, and soul.

🔧 Technical Specifications
• Type: Push-pull tube amplifier, Hi-End class
• Power Output: 2 × 50W RMS
• Tubes: 4 × GU-50 (power) + 2 × driver tubes
• Circuitry: Williamson topology
• Frequency Response: 20 Hz - 50,000 Hz
• THD: 0.4% at 80% power with soft harmonic roll-off
• Noise Level: below -87 dB — completely silent background
• Inputs: 3 × RCA (for turntable, DAC, streamer, etc.)
• Speaker Outputs: Premium binding posts (4/8 Ohm compatible)
• Weight: 30 kg — heavy chassis for optimal damping and stability
• Year: 2025
• Origin: Handmade in Ukraine

Demo video:

🌟 Features
• Built around military-grade GU-50 tubes — renowned for their bold bass and rich midrange
• Excellent detail retrieval, linear response, and effortless control even with demanding speakers
• Soft tube warmth without harshness or fatigue — music feels alive
• Premium gold-plated terminals for signal integrity
• Dual VU meters for real-time output feedback
• Designed for both home hi-fi and studio monitoring use

💡 Why GU-50 Is a Hidden Gem
Originally designed for military-grade transmitters, the GU-50 is robust, efficient, and sonically vibrant. Paired with the elegant Williamson circuit and carefully selected components, this amplifier becomes a reference-grade tool for any serious listener.

🧠 Audio Philosophy
The amplifier is fully handwired — no mass production, no PCB shortcuts. Only pure sound engineering.
Lamps from the golden era (1960s-70s) are used — with real metals, real glass, and long lifespans.

🎧 Application
Ideal for vinyl playback, DACs, streamers, or preamp setups.
Perfect for pairing with KEF, Dynaudio, JBL, Wharfedale, Bowers & Wilkins, Klipsch, Focal, and other audiophile speakers.

📝 Product Description
Please see the pictures of the products for more details about the condition of the products.
Fully tested. In working condition. Please inspect all images for condition reference.
Due to its age, this item is sold as is, with no warranties or guarantees implied, and no returns unless otherwise stated.
If you have any question or concern, please do not hesitate to contact me.
⚡ Please check and take into account the specifics of your local electrical network. If necessary, purchase a voltage adapter (not supplied).
❗ Cassettes, Reels, Vinyl records shown in the photos are for demonstration purposes only and are not included in the sale.

📦 Shipping
The item will usually be shipped within 2-3 business days after your full payment has been received.
I will send you the tracking number once your order has been dispatched.
The items are shipped from Ukraine.
Standard shipping: approximately 10 working days.
📌 Import duties, taxes and charges are not included in the item price or shipping cost. These charges are the buyer's responsibility.
I will try my best to reduce the risk of customs duties.
Please check with your country's customs office to determine what these additional costs will be prior to buying.

⭐ Feedback
Your satisfaction is my first priority.
If you are satisfied with your purchase, please take a minute to leave me positive feedback — I truly appreciate your kindness.
If you have any kind of question or concern with your order, please contact me — I will do my best to make sure you are satisfied.

📩 Contact Me
Please click "Ask a question" to send a message through eBay.
I always respond within 24 hours.
Any situation, any question — you're welcome to contact me.

🌀 Looking for More?
We always have over 100 models of vintage audio gear and accessories in stock — including turntables, boomboxes, cassette decks, amplifiers, and rare parts.
Check out our other listings to discover more retro treasures.

🔍 SEE OUR OTHER ANNOUNCEMENTS
🙏 Thank you!
— Igor ORT