- Value: Chinese 6AX7 Tubes
- Standard: Chinese 12AX7 Tubes
- Professional: Russian 12AX7EH Tubes
The BIYANG OTD-100 is a tube distortion powered by selected one Russia 12AX7EH vacuum tubes. Very natural sounding and highly sensitive. All-tube distortion the BIYANG OTD-100 unique paracyclic filter makes it the most versatile distortion ever! From warm overdrive to vacuum tube distortion sustain to the heaviest metal tube driven screams, you won't find a creamier distortion than the BIYANG OTD-100.