Dear @holmz @drbond : At the end digital tech is used in almost all today subwoofers through the DSP that is the one that can gives us ( comes with a microphone. ) where in position and to our " ears " makes the " best " system/room integration.
^All true^. However the analogue approach is well thought with the Vandy sub system.
It may not work in a system with a different filter in the speakers as the phase could be off.
And everyone one adjusts the subs with a microphone, and either potentiometers or S/W equivalent of a potentiometers.
At least knowing that there are non-DSP approaches, and mentioning it in a thread, is not a crime. We would need a way to compare that solution to the digital one☝️to be able to say whether it is better, worse, or the same.
If one is a purist then “High Pass Filtering” (HPF) the signal going to the main speakers is often a bit “on the nose” conceptually. I have no problem with DSPs, and streaming into and out of a DAC, and conceptually into and out of a DSP. But those that do, may want to know that they’re is a non-DSP approach.
And one can then use a DSP “ONLY” on the sub band without digitally touching the signal coming out of the L/R speakers.
Dear @holmz : A subwoofer is a complete solution where the crossover is only an inherent and important part of any sub ( a key like you posted. ) along the box, drivers and the like.
^Correct^. You are not the only fellow or lady that understands what a system is.
The crossover is not a second product but is part of the subwoofer it self that must has a low/high pass filters and several other functions.
The other stuff on that web-site has the subs which rely on the HPF.
(It’s part of a system)
Even this 32K dollars can’t even the Velodyne THD 0.5%. Well certainly maybe the best sub out there and you need 64K :
It is sort of important to note that the 0.5% is meaningless in the sub band…
But it becomes pretty important in terms up HD and IMD for the higher frequencies that attenuated from the filter, but still made be created in the sub itself, and then give away their location.
The subwoofer bass solution with good integration to the main speakers and room give you huge benefits. We can’t talk here of disadvantages in the same way we can’t say that a phono stage has the disadvantage of the RIAA eq. because it’s part of the phono stage in the same way that creossover is integral part of a subwoofer.
Btw, when we have well integrated subs in our system there is no come back, we learn that we can’t listen any more with out it due that helps to lower the distortions levels of not only the speakers but amplifiers too and several other advantages.
Again… you are not first to discover ^this^.
