Overview — The Triode 25 Black Edition

The Unison Research Triode 25 Black Edition advances the acclaimed Triode 25 platform with enhanced circuitry, improved power supply design, and updated digital connectivity. It offers selectable Pentode (50 W per channel) or Triode (30 W per channel) modes, giving listeners flexibility between dynamic power and refined tube character.

With Gold Lion tubes, micro‑relay input selectors, Return‑GND technology, and built‑in DAC3 module (USB, S/PDIF, Toslink), the Black Edition merges classic tube warmth with modern versatility. Handcrafted in Italy in a piano‑black aesthetic, it is as striking visually as it is audibly. 

Highlights & Benefits

• Select between Pentode mode for power or Triode mode for sonic refinement.
• Built‑in DAC with high‑resolution support via USB, S/PDIF and Toslink. 
• High‑quality Gold Lion tubes and precision components for exquisite sound.
• Modern analogue and digital connectivity fused into a classic tube architecture.
• Elegant appearance and artisan build — a centerpiece as much as a performer.

Design & Technology

Push‑Pull KT77 Output Stage — Provides 50 W (Pentode) or 30 W (Triode) with high linearity.

Gold Lion Tubes — 2 × ECC83 and 1 × ECC82 for the pre‑amp section, and 4 × KT77 in the power section. 

Modern DAC3 Module — USB up to PCM 384 kHz, DSD up to 256; S/PDIF and Toslink also included. 

Return‑GND Input Selector & Micro Relays — Ensures ultra‑clean signal routing and channel separation. 

Perfect For

• Audiophiles seeking high‑end tube performance with modern digital versatility.
• Systems requiring flexibility between Triode and Pentode modes.
• Vinyl lovers and digital streamers alike needing premium connectivity.
• Stylish setups where looks and sound both matter.

Customer & Expert Reactions

“Triode 25 Black Edition takes what was already great and raises the bar — deeper dynamics, more clarity.”

“Modern inputs plus old‑school tubes — perfect balance of heritage and relevance.”

Why Buy From Us

• Authorized Unison Research Dealer
• Genuine Italian tube amplifier craftsmanship
• Expert setup support & free nationwide shipping
• Premium packaging and full warranty support