Here are some tone samples for different amps we have built - thanks to customers and colleagues who have recorded these clips.
AC15 112
15 watt EL84 duet amp, GZ34 or 5Y3 valve rectifier, 1 x 12" Speaker Channel One - British Invasion, Top Boost tone stack, twin triode gain stages. Channel Two - Top Boost tone stack, single pentode gain stage.
These tone clips recorded with the GZ34 rectifier and a forty year old speaker.