Nothing for nothing, but it's conceivable your T1s we're problematic (at least with respect to the 1R) from a bass perspective.
You cannot just state that you're using Fleetwood Mac's, Go Your Own Way, without a more precise frame of reference. I assume that you're meaning the studio version from the Rumours album. Yes, there's bass in that track, but nothing that should be considered anything to judge by. And if it's some other version, then who knows?
You need to use some kind of known reference material, to which there are hundreds of recordings. Fleetwood Mac is not going to be on that list, albeit they are a spectacular band and I have a lot of their recordings.
Besides reference recordings, you could run a frequency glide (20 HZ to 20,000 Hertz) *at very low volume* through any kind of streaming service, even free ones like YouTube, just to listen if the perceived volume (and we don't have to get into more granularity like Fletcher Munson or Harmon curves) to *you* is the same. It should be. Then your "Golden" (pun intended).
If you want to purchase music for reference reasons I can recommend the following.
2) Denon Audio Technical CD. It has a number of tracks with sample music that covers the entire gamut of frequency range, dynamic range, imaging subtleties, etc.
www.cduniverse.com/search/xx/music/pid/1...dio+technical+cd.htm
3) Sony Music Super Audio CD Sampler
www.amazon.com/Music-Super-Audio-Sampler-Players/dp/B003UQ4CXC
4) Because bass is your concern, play Mickey Hart's Temple Caves.
Best.
Hal