I have transcendance speakers also. I talked with the vp of Hales at lenth about witch sub would be best and He urgered me yo buy a Rel . I did and am very happy I bought the Stadium II 2500.00 retail now the III is 3000.00 . They are the best integrating subs that I have ever heard , go to there web site. Check reviews at audio review. The Stentor is the next step up . Don't be skeptical about the power either My sub is only 100 watts My room is 18w x 32l with 12' cielings and it fills it just great.
John
John