Hughes & Kettner Preamp/Recording Amp Benutzerhandbuch

The sounds suggested

here can only be rough indication, as they will vary

considerably depending on the instrument used and your playing technique. Once

you have set-up a basic sound which you like, the boost functions and the pre/post

power amp switch provide instant access to different sounds.

1. 

For raw valve sounds, turn gain little over half way. MID BOOST is activated,
LINE PRE/POST  switched to POST power amp.

Set GAIN between 4 and 5, emphasize the bass region with the tone control 

,

activate BASS and TREBLE BOOST and set the switch to POST POWER AMP.