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ST-70 & AB, ultimate ST-70 upgrade kit, auto bias

ST-70 & AB, ultimate ST-70 upgrade kit, auto bias PC-3 driver - ECF82, 6GH8

Power driver + autobias for PP four triodes or pentodes !! It will be on sale for a month !!

RIAA Phono Preamplifier for magnetic phono cartridge

3 Band Preamplifier - Double Bass, Bass, Treble

Driver for Dynaco ST-70 including module AB for autobias

Autonomous automatic control bias system ABF-Q without bias source

Auto bias module specially for amplifier DYNACO ST-70, ST-120 !! It will be on sale for a month !!

Auto bias module specially for amplifier DYNACO M125 !! It will be on sale for a month !!

Auto bias module ABS-Q+ !! It will be on sale for a month !!

Auto tube bias control  

100% technical support by contact e-mail !
Send a diagram of your amplifier, we will draw the connection to your amplifier.

Lovers of tube amplifiers, musicians !

Experience the perfect sound of your amplifier! Get rid of bias frequent adjustment, without which the sound is never perfect !
Try our automatic bias setting system.
Set it up once, and never again!

This system ensures the absolute balance of the amplifier and thus ensures perfect performance and long life of the tubes.
Replacing the power tubes is a breeze as well. Plug in a new batch of tubes which may not even be paired, disconnect the input, turn the amp on and let it sit for 5 minutes. That’s it. No special tools or devices required. Everything is set up perfectly automatically.