I decided to A-B compare it to my ST-70 with the older high gain driver board. I plugged the left channel from my SP-12 into the Mk III and ran the right through the ST-70 and used the preamp's separate gain controls to listen alternately to each channel to compare.
The sound characteristics were immediately apparent, but my question is about volume. To my surprise, the volume levels of each amp were the same as I switched back and forth. I expected the Mk III channel to be louder at the same preamp volume level than the ST-70.
Can you fine gentlemen help me to understand where my logic is flawed in this matter? 35WPC vs 60WPC...how does the power difference translate into tangible, real world differences?
Thanks for whatever insight you may supply.
Best to all,