I hope this is clear...

I am trying to hook up a HSU Research VTF3-MK3 Turbo with a MBM12 (basically the VTF gets LOOOOOW but is slower in the mid bass - the MBM is a mid bass specialized sub but none of that is vital to my question, just sharing).

To do this I need to do one of two things and I don't knwo what the products I need are called or if they exhist.

Option 1 - Split the signal at the receiver and go into 2 EQ's #1 would go to VTF (low end) and cover 50hz-60 and below, #2 would go to the mbm and cover 50-60hz to 150

Do these "eq's" exist? what are they called?

Option 2 - get one unit that can split the low and high into 2 speaker cables each covering the related Hz frequencies

Does a unit like that exist? What is it called if it does?

I Want to use my onkyo 805 as my main pre-amp and amp but just split the sub frequencies between high and low in whatever is the most cost effective manner.

Also if it helps I plan to run My front speakers as Full Band on the reciever (they are Paradigm Studio 60 v3 so they can handle it) and set the double bass to "on" so both the sub and the speakers in the front are able to handle the full frequency the difference will just be that the subs will split up their duties.

Sounds like you needing something such as the Behringer DCX2496 Ultra-Drive Pro Digital Crossover System.

Why do you want to EQ the 2 subs separately? You should probably EQ their combined output as a whole. In other words, split the signal AFTER the EQ.


I Want to use my onkyo 805 as my main pre-amp and amp but just split the sub frequencies between high and low in whatever is the most cost effective manner.That is not how the MBM was designed to be used. The MBM already has a fixed 50Hz high-pass filter in it. You adjust the "low" sub's variable low-pass filter somewhere in the neighborhood of 50Hz to best integrate it with the MBM's 50Hz high-pass filter. Voila, the "duties" are split.

Sorry but I have no idea what you mean?

The MBM can only handle 50hz and up. The VTF can handle a full range but does BEST with 50-60hz and below.

Also they suggest something called a bass delayer? set to 1 millisecond and adjusted for the distance of the VTF from the eating area.

I am so lost on all of this

Why do you want to EQ the 2 subs separately? You should probably EQ their combined output as a whole. In other words, split the signal AFTER the EQ.


That is not how the MBM was designed to be used. The MBM already has a fixed 50Hz high-pass filter in it. You adjust the "low" sub's variable low-pass filter somewhere in the neighborhood of 50Hz to best integrate it with the MBM's 50Hz high-pass filter. Voila, the "duties" are split.


Sorry, you clearly are much more expereinced and this is a bit lost on me. i apprecaite it but am a bit confused...

Are you saying I just run the full signal to each? I have only had luck letting my reciever control the EQ and setting the crossover to out so it does this and not the sub. When I let the sub do it (with just the VTF-3) I got much much less sound (almost none)

Sorry, you clearly are much more expereinced and this is a bit lost on me.I'm not, actually. :o


Are you saying I just run the full signal to each?Yes.


I have only had luck letting my reciever control the EQ and setting the crossover to out so it does this and not the sub. When I let the sub do it (with just the VTF-3) I got much much less sound (almost none)Right. And that is how you are supposed to do it. But with the MBM things are different. I explained the scheme in my post above. Do you already have the MBM? If so, the instruction manual should guide you in how to implement it. If not, the manual is available on the HSU site.

You'll still probably want to want to use the same crossover setting in the receiver that you have been using. What you will have to do prior to EQ is adjust the VTF's crossover (it's really an adjustable low-pass filter) and the relative volumes of the VTF and MBM so that the combined overall response of both of them is, as best as possible, as flat as possible. The goal is to have to apply as little EQ as is necessary. If the relative volume of the MBM is too high, then the EQ will have to squash the frequencies it is reproducing. Same for the VTF. Or, if the crossover region between the 2 subs (around 50Hz) is not adjusted well, the EQ will have to make an effort to fix that (and it will). But, you have a lot of things to fiddle with.

Properly adjusted the MBM and VTF will operate, in concert, as a single "unit" and a can be thought of as such.

A ton of info to digest here... I dont have the MBM yet but i read the manual on the site briefly. It seems very brief (HSU often assumes its users are knowledgable.)

A ton of info to digest here... I dont have the MBM yet but i read the manual on the site briefly. It seems very brief (HSU often assumes its users are knowledgable.)Questions?

No questions right now... I am still too confused (and tired ha). I'll gather the info I need to ask intelligent(ish) questions before going further.

My HSU VTF has been a nightmare, Dr. Hsu himself requested my amp back to take a look at it but I have seen enough promise in it to be considering adding the supercharger and the mid bass to let them each do what they are meant to do (upper/lower). If it works out the two combined should beat any single sub in their pricerange... I hope.

Thank you for being so helpfull.

I would highly recommend the Anti-mode 8033. It sounds like you are fairly new this and this device is easy as it comes and works very well.

I have a DIY sonosub utilizing an Avalanche 18, MFW15 and an MBM 12. I run a sub cable from my pre-pros sub out to the anti mode than out of the anti mode to the 3 subs. Very easy to use, you set up a mic and press a button. The Anti mode runs a series of test signals and all of your subs are eq'd.

There is an available 20Hz lift and 30Hz lift if you desire or you can keep it flat.

Here is a link http://www.dspeaker.com/en/home.shtml

Now if you're more into getting in depth and seeing graphs of whats going on you can try a Behringer. But this is much easier and quicker enjoyment without the learning curve (for the lazy man like myself):)