Original design by АМТ Electronics engineers - 12AX7 tubes solid-state equivalents - 12AX7 Warm Stone!
Before you buy, make sure that the anode (plate) voltage in your device at is least 30V.
Warm Stone tubes feature:
- 100% functional analog of vacuum 12AX7/ECC83 tubes (same size too!)
- Constant characteristics during whole service period - no need to replace them almost at all!
- Blind tests show no difference in sound character between WS and vacuum tubes
- Original design and cool look (orange line glows when they're on)

The User Manual and other additional materials for this device can be found in the AMT Media Center http://media.amt-sales.com/
Type:
functional analog of tubes 12AX7, ECC83
URL of the product on the official website:
http://amtelectronics.com/new/amt-12ax7ws/