A WORD OF CAUTION!The HT bypass may be useful in some respects, but beware!!!
If accidentally engaged during normal playback, you may have a disaster on your hands, if you're not exceptionally quick.
This is because the HT bypass does not only bypass the tube stage, it also totally bypasses the volume control!
This means that any source playing will be directed directly to the power amp -
AT FULL VOLUME!!!!!I've already heard of a couple of AKSAphiles who had a "near miss" when accidentally pressing the wrong button, only saving their speakers by reacting extremely fast.
My suggestion would be to disable the HT bypass, if you're not going to use it anyway. It's only a couple of wires that are easily reattached, should you need them some time in the future.
Be careful out there!
Cheers,
Jens