Unison Research Black Edition walnut series and Unico DS introduced

According to Salon AV's report dated November 4, 2026, Unison Research refreshed its Black Edition tube integrated amplifier series with walnut veneer case option. The series includes Simply Italy, S6 and Triode 25. The brand simultaneously announced its new flagship digital source, Unico DS.

What changed in the Black Edition series?

The common innovation is a circuit that electronically maintains fixed bias adjustment for KT77 Gold Lion output tubes. The report states that this circuit eliminates the need for manual bias adjustment throughout the tube's lifetime. All three models feature micro-relay input selector, "ground return" technology inherited from flagship models, three-input internal DAC (USB, SPDIF, Toslink), and active subwoofer output. Operating range is specified as 10–15 Hz to 30 kHz.

• Simply Italy B.E.: Class A, 10 W; two ECC82, two KT77; CCL design. Russian price 460,000 rubles.
• S6 B.E.: Class A, 40 W at 6 ohms; two ECC83 at input, three KT77 at output. Power increased 15% versus standard version. Russian price 820,000 rubles.
• Triode 25 B.E.: Class AB; 30 W in triode mode, 50 W in pentode mode; four KT77. Russian price 599,000 rubles.

Walnut veneer models carry the same Russian price as black versions.

What features does Unico DS offer?

Unico DS combines CD transport, network player and DAC in a single chassis. Front panel is 15 mm aluminum, top cover is 2 mm aluminum. Two color options available: Midnight Black and Velvet Gold. The wooden section on the front face references the brand's vintage logo, and the logo functions as a capacitive power button.

• DAC: ESS ES9038Pro; I/V stage equipped with AD8599 op-amp.
• Power section: five independent low-noise regulators.
• Analog section: balanced, class A; Gold Lion ECC83/12AX7 and ECC82/12AU7 tubes.
• F.D.F. (Frequency-Dependent Feedback): increases feedback at low frequencies, decreases at high frequencies.
• Network: TIDAL, Spotify Connect, Qobuz, Roon Ready, DLNA/UPnP; Ethernet or optional Wi-Fi adapter.

Russian price 950,000 rubles. The report contains no information on Turkish pricing or availability.

Why it matters

Automating bias adjustment in tube amplifiers is a concrete design step toward reducing maintenance burden. Unico DS can be followed as an option that consolidates tubed analog stage, network player and CD transport in a single chassis.