- Written by Brian Alvarez
- Published on 24 April 2012
Design of the Tannoy Revolution DC6T Floor-standing Speaker
The relatively compact DC6Ts are very handsome speakers. Fit and finish is excellent with an air of sophistication and modernism without being cold. The lack of visible screws on the front panel and the magnetic grills lend to a very elegant look. Silver trims rings around the drivers and the silver drivers themselves contrast nicely with the black rubber surrounds and dark brown espresso finish of the speaker.
The isosceles trapezoid shape of the cabinet is strikingly attractive. The shape allows the cabinet to be more rigid and helps dissipate energy within the cabinet. I actually find the profile to be more attractive than the round tapering cabinet of the more expensive Signature Revolution series. Solidity is impressive as well, removing the speakers from their cartons, there's a feeling of having been milled from a solid piece of material. There's no flex, no resonance, the walls are incredibly inert, the whole speaker is very solid and nicely weighted towards the bottom.
Plinths are provided and to be honest they distract from the visual appeal of the speaker. Thankfully the Tannoy DC6Ts are so solid and the included floor spikes so rigid (hardwood floor metal cups are provided, as they should always but seldom are) and easy to lock that the DC6Ts are not likely to tip if used without plinths. During the time on my hardwood floors they survived a minor earthquake and several accidental bumps while fiddling with cabling without so much as even sliding on my wood floors.
Packaging must also be praised, despite having suffered serious damage during transport, the boxes protected the speakers fabulously and there was not even a small scratch on the speakers.
The main design focus of the DC6T is the Dual Concentric driver. The benefits of having the tweeter in the throat of the main driver is to provide a point source for the critical mid band. The human brain is most sensitive to the midrange area of our hearing and having the hand off to two drivers physically separated in space can create issues. Often times if you don't sit on axis with a traditional speaker, you get a suck out or boost in the crossover range between the tweeter and mid/bass driver. This off axis frequency shift means that you won't hear a flat response unless you're exactly on axis either vertically or horizontally or worst, both.
Time alignment hasn't been conclusively proven to be a big advantage but in my own experience, time aligned speakers tend to have just that bit more snap and realism. The Dual Concentric driver supposedly time aligns (I have no way to confirm this) the tweeter to the main driver by physically locating it behind the cone area of the main driver and coupled to a Tulip Waveguide which acts as both a waveguide (I would assume the cone driver also acts as a waveguide) and horn.
Another benefit of the Dual Concentric driver is a 90 degree dispersion across most of the frequency spectrum. With most separate driver configurations each driver has a different dispersion. Waveguides in particular help to reduce or eliminate this and in my listening experience most speakers with a proper waveguide (not easily done) have significantly more consistent dispersion and integration between the tweeter and mid/bass driver. There is one additional benefit to a 90 degree dispersion especially at midrange frequencies, in the right installation it will reduce the effect of wall and ceiling reflections. In my own listening room I found a welcome similarity between listening to the DC6Ts with and without my room treatments. Only small studio monitors like JBL LSRs and Genelecs have been as consistent. Most residential speakers lack focus and suffer from a bloated mid range in my room without my treatment panels up.