Different power tubes and rectifier type
We deliver the amp with 6L6GC-STR power tubes from Tube Amp Doctor for the classic 6L6 tone and
maximum lifetime. 6L6 tubes give you maximum headroom and the highest output power. If you like you
can use EL34 instead of 6L6GC tubes. When using EL34 the headroom and output power will decrease a
bit, but if you are looking for the British type of distorted sound then EL34 will probably be your choice. We
usually equip the amp with tubes from Electro Harmonix when having a EL34 request.
Note: When changing power tubes you must always adjust the BIAS setting inside the amp. This should be
done by qualified personnel. Never open the amp by you self, there is high voltage inside the enclosure.
There is also a possibility to use a tube rectifier, instead of diode rectifier. A tube socket (the one closest
to the power inlet) has been mounted for this purpose. To change to tube rectifier, just replace the
adapter, mounted from the factory, with a GZ-34 rectifier. This should be done by qualified personnel and
the BIAS must be adjusted at the same time.
