The board is a dual-layer FR4 with a distinctive 2mm thickness to reduce microphonics. Gamut famously avoided global negative feedback loops on this board, opting instead for local feedback around the input stage (a differential JFET pair). This gives the sound its "holographic" midrange.
Since "Gamut" is famously a high-end Danish hi-fi brand (Gamut Audio), I have focused on the context of a replacement, DIY, or restoration board for their legendary amplifiers (e.g., D200, D3i). If you meant a broad-range amplifier board (gamut as in "wide range"), see the alternative at the bottom. Title: Gamut Audio Amplifier Board – Genuine OEM Replacement for D200 / D3i (Left/Right Channel) gamut amplifier board
9/10. A pain to solder, but heaven to listen to. Option 3: Social Media (Instagram / Facebook Caption) Visual Idea: A close-up shot of the green PCB with large gold-plated traces and heatsinked transistors. The board is a dual-layer FR4 with a