In my experience the optical out on my TV does not do volume control so at least check if your tv does or not and prep for it. Personally i'd go to the Yaggy first then to your preamp (2channel). I'm sure the preamp will not have a DAC as good as the Yaggy. Best would be optical out to DAC balanced cable to your Mac. Now I'm thinking totally 2 channel here so not sure how the Home theater would work probably you'd have to go to your preamp first to get all the channels. Then i'm not sure what you'd even use the yaggy for maybe 2 channel on a separate input.
Connect optical/digital audio out on TV to pre-amp or DAC?
Going to run audio out (optical) from TV that would have either my blue ray audio or cable TV audio coming out, to my stereo (will be 7.3). I have a preamp McIntosh MX135 which does not have HDMI. I also have a Schitt Yiggy DAC. Will there be any difference connecting the TV audio output first to the Yiggy feeding the Mac or just connect it directly to the Mac?