New Soundsmith MOSTUBE ONE

Soundsmith is proud to introduce the “MOSTUBE ONE” – a long lived solid state replacement for the most popular power vacuum tubes. Many years of development have resulted in this device, featuring extreme stability, automatic matching, no adjustment required, “tube” like sonics (2nd order products) with an automatic 30-50% power increase for your amplifier. Replaces the 6550, KT66 through KT150, EL34, 6L6 and more. 

“No more wondering if your power tubes are failing due to age, or damage to your amplifier from internal tube failure.”