The ports length and width affect the frequencies at which the port generates sound; the longer a port is with respect to its width, the deeper frequencies it will produce.Let our rigorous testing and reviews be your guidelines to AV equipment not marketing slogans.Hsus VTF-1 hasnt been around as long as a model name, but its inception is so closely related to the original VTF-2 that it has to be considered an extension of that product line.
Hsu Vtf-2 Mk3 Drivers And VeryThe VTF-2 line started with 10 drivers and very similar cabinet dimensions and tuning points as the VTF-1, but the VTF-2 name was promoted to a line of medium sized 12 subwoofers, and the 10 variable tuning subwoofers were given the name VTF-1.Essentially, the VTF-1 carries the form that the VTF-2 started with. In evolutionary terms, this would be called common descent: two different organisms that share a common ancestor. The mk3 rearranges the cabinet by placing the driver and ports in front. It also gives the amplifier a boost from 200 watts to 250 and makes some alterations to the driver. Rubber feet replace spiked feet, and the satin black finish is now a smooth vinyl finish. Hsu also claims a very significant performance increase moving up to the mk3 along with a substantial price drop. This brief history of the VTF-1 has led us here with the mk3 in our hands, and we will see how these many layers of refinements over the years add up as a subwoofer in our review. It was bagged in a soft foam wrapping to protect it from scuffs, and a thick plastic bag around the foam bag to protect it from moisture. Since it is not a massive or heavy unit, these efforts should be more than sufficient to keep the it safe during shipping. The vinyl finish has a smooth sheen that is nice, although, as with the VTF-2 mk5, it seems to be somewhat of a downgrade from the satin black finish of the previous mk2. The rounded edges do soften its appearance, especially with the grille on. It is not a very large sub, at least in comparison to the subwoofers I normally review. It should be able to disappear in a dimly lit corner without problem if the user does not want it to stick out. They are not quite as simple as plug-and-play if you want to get the most out of them. Owners would do well to understand how sealing the ports combined with onboard equalization mode will affect the system. It shares the same amplifier technology, same cabinet construction and design; only the sizes are different. As with the VTF-2 mk5, the cabinet paneling of the VTF-1 mk3 uses 34 MDF, except for the front baffle which is 1.5 thick. There is a piece of cross-bracing supporting the two 12.5 long ports. Each port has a 3.5 diameter. The cabinet is lined with polyfill. The rubber feet are the same, as well as the grille construction that uses rounded metal pins for the grille guide sockets. For those who are not familiar with how this system works, we will quote from our VTF-2 mk5 review. They do this by using the backward motion of the woofer into the cabinet to resonate the air mass within the port.
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