Octal K8A 8-Pin tube-valve-base
The Performance EL34 puts out the Maximum in Details & Sound of the Amp
It is extra handselected by BTB for low leakage and Premium matchinh
From current Production its one of the best tubes in stability and sound
S4A ® "Selected For Audio" is a registered Trademark by BTB
height:97mm-socket diameter:32mm-bulb diameter:31mm (info can variy!)
EL 34

air cooled coaxial transmitting Triode
Uf=6,3V, If=65A

Octal K8A 8-Pin tube-valve-base
The perfect 6SN7GT-VT-231-5692-6180 for Audio and Studio Applications
It is extra handselected for low noise, low hum, low leakage
The tube puts no extra sound to the device - it sounds very neutral
S4A ® "Selected For Audio" is a registered Trademark by BTB
height:84mm-socket diameter:32mm-bulb diameter:32mm (info can variy!)

Noval B9A 9-Pin Gold Plated tube-valve-base-Röhrensockel
The best performing 12AX7-ECC83-ECC803s from current Production
It is extra handselected for low noise, low hum, low leakage, low THD
It puts out the best Audio performance with most possible details
S4A ® "Selected For Audio" is a registered Trademark by BTB
height:56 mm - bulb diameter: 22 mm (info can variy!)
ECC 83

Noval B9A 9-Pin tube-valve-base-Röhrensockel
The perfect tube for the Overdrive chanel - Rock and Metal sounds
It has a good attack and sustain paired with an extra portion gain
It is handselected by BTB for low microphony, low noise and low hum
The tube is handselected in Germany
S4GB ® "Selected For Guitar & Basses" is a registered Trademark by BTB
height:57mm - bulb diameter:22mm (info can variy!)
ECC 83