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Old July 26th, 2019, 9:47 AM
shaolin95 shaolin95 is offline
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So the VTF-3 MK5 HP goes lower and with more output than my vtf15 Mk1 ?

Hello!
I own 2 of the VTF15 Mk1 (and one MFW15) for 3 subs right behind my seating area.
I was surprised to find this information from Sound And Vision measurements:

The VTF-15H’s close-miked response with one port open, normalized to the level at 80 hertz, indicates that the lower –3-decibel point is at 24 Hz and the –6-dB point is at 18 Hz. The upper –3-dB point is at 162 Hz with the Crossover switch set to Out.


While the VTF3 MK5 shows this:

The VTF-3 Mk5 HP’s close-miked response, normalized to the level at 80 Hz, indicates that the lower –3dB point is at 17 Hz and the –6dB point is at 15 Hz. The upper –3dB point is at 144 Hz with the 4” port open, 3” port blocked, EQ = 1, Q = 0.7, and the Crossover switch set to Out.—MJP

Which is very close to the VTF15 Mk2!

So if I want those super low frequencies, getting the VTF3 will actually be a decent upgrade???
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  #2  
Old July 26th, 2019, 3:53 PM
Kevin_Hsu Kevin_Hsu is offline
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Hi there,

Unfortunately, we don't quite know how the methodology in how they got that response curve, so I cannot really comment on that. However, we do have freq response measurements on our site for all three of the subs listed (measured ground plane from 1 m away from the front baffle) and you will be able to see how one sub compares to the other in terms of freq response and extension. All three subs would be pretty similar in extension. I would say that the VTF-3 Mk5 HP would be a good upgrade if you're looking to get more clean output from 25 Hz on up. Below 20 Hz, both will fairly similar, with maybe a bit of a nod to the VTF-15H due to the larger cross-sectional port area (less port noise). The VTF-15H Mk2 will be the one to go with if you're looking for more improvement across the board. Still, the VTF-15H Mk1 is a great sub.
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  #3  
Old July 26th, 2019, 4:04 PM
shaolin95 shaolin95 is offline
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Quote:
Originally Posted by Kevin_Hsu View Post
Hi there,

Unfortunately, we don't quite know how the methodology in how they got that response curve, so I cannot really comment on that. However, we do have freq response measurements on our site for all three of the subs listed (measured ground plane from 1 m away from the front baffle) and you will be able to see how one sub compares to the other in terms of freq response and extension. All three subs would be pretty similar in extension. I would say that the VTF-3 Mk5 HP would be a good upgrade if you're looking to get more clean output from 25 Hz on up. Below 20 Hz, both will fairly similar, with maybe a bit of a nod to the VTF-15H due to the larger cross-sectional port area (less port noise). The VTF-15H Mk2 will be the one to go with if you're looking for more improvement across the board. Still, the VTF-15H Mk1 is a great sub.
Well I can get an Mk2 from a local for around $200 on top of selling one of my Mk1 so I would end up with an Mk2 one Mk1 and the MFW15 all next to each other behind my seating sofa. Wonder how that combination will be...
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  #4  
Old July 30th, 2019, 12:48 PM
Kevin_Hsu Kevin_Hsu is offline
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Should be at least as good as your current setup, only you have more clean headroom from the VTF-15H Mk2. I think the main thing you want to consider is the possibility of the other subs perhaps bottlenecking your Mk2.
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