Adding an 8" sub to a pair of 8" speakers is just stupid imo, obviously you would get more bass (tho the 2850DB can produce plenty of bass on it's own), but it wouldn't expand the frequency range, since the T8 can only go as low as ~38Hz. You'll need at least a 10" or 12" sub to get some worthy improvements in the low end.
Would adding the T5 subwoofer make much difference or not much?
Adding an 8" sub to a pair of 8" speakers is just stupid imo, obviously you would get more bass (tho the 2850DB can produce plenty of bass on it's own), but it wouldn't expand the frequency range, since the T8 can only go as low as ~38Hz. You'll need at least a 10" or 12" sub to get some worthy improvements in the low end.