Tec•On Audio Model “55” Integrated Vacuum Tube Stereo Amplifier / DAC

The Tec-On Model “55” is a compact, elegant integrated tube amplifier designed for modern and vintage systems alike. With its Class-A, single-ended EL84 architecture, zero global negative feedback, and integrated USB DAC (Burr-Brown PCM2702), it offers a direct, transparent audio path whether you feed it digitally or via analog sources. Ideal for efficient speakers, it brings a warm yet detailed tube character to both streaming and traditional sources.

• Compact multimedia integrated tube amplifier with built-in USB connection and DAC interface (accepts digital input via USB)
• Uses EL84 output tubes (two) and a 5755 tube as the input/driver stage 
• Class-A single-ended topology, with no global negative feedback for more “transparent” sound
• USB DAC: it contains a Burr-Brown PCM2702 Δ/Σ (delta‐sigma) 16-bit, 44.1 / 48 kHz converter to let you bypass your computer’s sound card and feed the amp digitally via USB 
• RCA line inputs (for CD, tuner, etc.) via analog path; but note when USB is connected, it usually has priority over RCA analog input 
• Self-biasing tubes (no user bias adjustment required) 
• Accepts loudspeakers rated 4 Ω to 8 Ω 
• Recommended speakers: those with relatively high sensitivity (e.g.,≥89 dB/W/m) to better match the lower power output 
• Dimensions: approx. 246 mm × 190 mm × 200 mm (L × W × H) 
• Net weight: ≈ 8.5 kg 
• Power consumption: about 38 W 
• Operates on AC mains: factory set for local voltage, supports AC 115 V / 220-230 V ± (50–60 Hz) depending on model version