I love my tone from this amp but find the half power switch on my 100W head pretty useless. At the low power setting the amp sounds thin and lacks punch. It sounds much better with switch on full and the master rolled back. I have an Airbrake which at two clicks down has the same volume as the switch at half power but sounds so much better (actually pretty close to unattenuated). Is this my amp or is a problem with the switch circuit design?