I just checked out the manuals for the new 7 and 28 and noticed something interesting with respect to idle power consumption and heat dissipation. These specs were the same for both amps in the SST2 series.
For the 7 the idle power consumption has dropped substantially from 215 watts (the SST2 series) to <= 80 and the heat dissipation went from 733 BTU/hr to <= 270.
On the other hand the specs for the 28 have gone up a bit, <= 225 watts and <=768 BTU/hr.
So this led me to check out the 4. This ended up being hybrid of sorts, the power went down from 170 watts to <=70 but the heat dissipation remained the same at 580.
James is there any particular reason why some amps seem to have become more power efficient while others have not? What are these changes properties of, the new input circuity or changes to the power supply and/or transformers?
Just curious how these figures would be affected for people who do the SST2 upgrade. If it's input stage related users would see these changes but I guess if power supply and/or transformer related these changes wouldn't be seen on the upgraded units.
Thanks