MP-301 MK4 Tube Amplifier with Speaker & Headphone Output

*Pre-order. Shipping starts September 30, 2025.

15 Years of Refinement! From the First Generation to the MK4, Every Evolution Pursues Richer Sound

Since the debut of the first MP-301 in 2008, three generations of continuous improvement have laid the foundation. On September 20, 2025, the 4th-generation MP-301 MK4 finally arrives! Featuring 9 core upgrades and audiophile-grade components, it elevates the signature "warm, natural Class A sound" to a new level of delicacy and engagement. Whether driving speakers or serving as a headphone amp, it lets you rediscover the true essence of music.

✨ 9 Core Upgrades That Target Pain Points — Every Detail Honed for Purity

1. Full Aluminum Alloy Chassis – Enhances anti-interference performance while the matte finish adds a touch of elegance to your listening room. Not just an amplifier, but an "acoustic work of art" that excels in both aesthetics and sound.
2. Upgraded EI-Type Transformer – Moving away from toroidal designs, the EI structure delivers a warmer, more natural timbre. Vocals and classical music gain immersive detail, revealing a smoother, more charming sound.
3. High-Power Layered Output Transformer – Meticulously wound in multiple sections to extend frequency response, enabling deeper bass, smoother treble, and a wider, more expansive soundstage.
4. Large-Inductor Filter Choke – Supplies stable, ultra-clean power for reduced background noise. Even with soft late-night listening, it’s quiet enough to hear your own breathing.
5. Power Boost to 10W per Channel – With KT88/6550/KT120 tubes, output rises by 3.5W over the previous generation. Drives speakers like the Dali Menuet or KEF LS series with ease and greater dynamic headroom.
6. Full DC Linear-Regulated Filaments – Balanced layout minimizes background noise to near inaudibility, eliminating AC hum that disrupts listening sessions.
7. Comprehensive Circuit Optimization – Produces a richer, more refined sound with seamless transitions across the frequency spectrum. Even familiar old tracks reveal hidden nuances.
8. Gold-Plated RCA & Speaker Terminals – Reduce signal loss, ensure smooth connectivity, and resist oxidation—preserving consistent sound quality over years of use.
9. High-Precision Fast Blown Fuse – Provides instant protection during overcurrent or short circuits of defective power tubes, safeguarding transformers and components.

✨ Hi-Fi Technology

• Single-Ended Class A + No Global Negative Feedback – Preserves the purest tube sound without complex feedback circuits, creating a vivid, lifelike presentation.
• Self-Biasing for Plug-and-Play Operation – No bias adjustment needed! Swap in 6L6, EL34, KT120, and more—just plug and enjoy. Perfect for beginners with zero risk of incorrect bias setup.
• Top-Tier Audiophile Components – Transformers and chokes use imported Z11 grade silicon steel cores. Capacitors come from Nichicon, Rubycon, and Philips BC; resistors from Vishay Dale (U.S. military grade); potentiometers from ALPS (Japan). These parts outperform many premium competitors’ products, ensuring uncompromising sound quality.

✨ High Quality Headphone Amp Performance — Perfect for High- and Mid-Impedance Headphones.

The MP-301 MK4 isn’t just a speaker amplifier—it’s a "$2K-class headphone amp"! The headphone output also passes through tubes and output transformers, inheriting the same sonic character as the speaker output:

• Class A output power: 2W at 32Ω / 1.2W at 55Ω / 250mW at 300Ω / 120mW at 600Ω. Easily drives headphones like the AKG 701, Sennheiser HD800, Beyerdynamic DT990 pro, and HIFIMAN HE6 to their full potential.
• Vocals feel as if the singer is right beside you, while classical works unfold with remarkable instrument separation. No need to invest in a separate headphone amp!

✨ Technical Specs

✨ Matching Guide — Pair with Confidence

Compatible with a wide range of speakers, but not limited to the followings:

• Musical Paradise MP-S1, Dali Menuet
• KEF Q/LS Series, Harbeth P3
• JBL 43/44 Monitor Series, Focal 7 Series. Triangle Borea/Titus/Comète
• B&W 6/7 Series, Q Acoustics (UK)

Warranty Policy – 1-year warranty for the entire unit; 2-month coverage for tubes (consumables). Responsive customer support for total peace of mind.

✨ Don’t wait! Whether you’re a Hi-Fi newcomer or an experienced enthusiast, the MP-301 MK4—with its premium build, refined sound, and unbeatable value—will take your listening experience to the next level.

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