Subwoofer advice sought


I have a pair of Totem Forest Signature driven by a 100 wpc Unison Research Due amplifier. It has loads of power to power these speakers and has a subwoofer output. I have a medium sized room.

My local hi fi dealer said I would get better sound with the addition of a subwoofer with the results being better midrange and sound staging as well as better bass.  How is this possible?

The 2 subwoofers I am looking at are the Totem Storm and The REL T/7i. My dealer sells the REL and says it  would be a good match for the Totem speakers as it is very quick and tuneful.  Can anyone explain why a subwoofer would make these differences to the sound?  I also would be interested to hear from anyone with experience with these specific subwoofers or pairing a subwoofer with Totem Forests. Thanks.
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Showing 1 response by gdnrbob

There is also Vandersteen.
His subs use a high pass filter between the amp and preamp and offloads all the power draining lower frequencies from the amp to the sub. The newest model, Sub 3, offers an equalizer to compensate for room aberations.
Mr. V also sees the beauty of using multiple subs in achieving natural sound.
Bob