Vandersteen high-pass filter with other Subs


I would like to relieve the midrange congestion of my Vandersteens by inserting a sub(s) with high-pass filter, per Vandersteen's own design.

I already own REL Stadium III subs and would like to keep them. Would there be any problem inserting a vandersteen x-over between my pre and amp (say, e.g. the one used in the model 5) and sending the outputs of my amp to the RELS, rather than to Vandersteen 2WQs? Or will I have some sort of impedance or other circuitry issue, of which I am currently happily ignorant?
judit
Maxgain,
I am talking about a direct swap comparison of the 805s with the Vandersteens without the REL inserted at all. I have run both speakers with chesky set up disc to optimize placement and room treatment. The muddiness in the Vandersteen mids is audible on human voice as well. However, remember I am running 10 year old Vandersteen 3s. Vandersteen claims significant changes with the 3Asigs, we shall see. I will let you know how this upgrade changes things, if you are interested.

The 805s have their own specific limitations as well - the roll off in the bass does not trouble me much at all. I am surprised by the quality of these small monitors. However, the tweeter is harsh and with some material - a problem that the Vandersteen's do not have.

Thanks for your interest - I learn quite a bit from discussions like these.
Judit, Have you gotten your Vandersteens back from the upgrade? I am wondering what you thing of the changes. I ssume that their will be some run break-in time that will be required. Be very careful in setting the rear tilt on Vandersteens, as this can account for what you describe as well as room interactions.

I am not familiar with the Chesky set up disc and wonder if you can tell me a bit about it? I know that some people rely on computer programs to position their speakers which in my opinion is flawed, compared to setting them up by ear.

You may find it interesting to read Richard Hardesty's issue #2 of the "Audio Perfectionist Journal", which can be downloaded from his web site for free. www.audioperfectionist.com
Maxgain,

My Vandersteens are not back yet from the 3asig upgrade. I am curious as well. Thanks for reminding me about tilt.

I find the set up disk useful for two things: (1) I am able to quickly assess maximum separation by moving my speakers apart until the central image begins to break up.
(2) They have a listening position called "beyond" the left and right speaker. The narrator's voice actually shows up to the left of the left speaker then to the right of the right speaker. I often find that these image positions are the ones that are most affected by room interaction. One side will image "beyond" while the other doesn't. I invariable find the source with the result that sound stage width is as good as it gets.