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I would humbly suggest playing around with your placement, even w/o the manual or a conversation w/ VSA. I have found that even the slightest change effects the sonics considerably...whether it is distance from the wall ( side or front) or toe -in. Sometimes even a change of less than an inch on toe-in is significant.Again, I also recommend stuffing/unstuffing the ports...you could even use a pair of rolled up socks if you don't have any polyfill. I think that you'll be surprised as to how much they can be tuned.Good luck.Paul
In addition, one more thing you can try along these lines. George Short of North Creek Music made this popular. Cut multiple straws of exactly the same length as the port. You will have to test fit them somewhat, so that all the straws look like they haven't been bent out of shape. Next dip those straws in shellac to keep them together. Then reinsert them back into the port. He found that the bass was MUCH cleaner, especially at higher levels of output, must be due to laminar flow through the port. I did this on my North Creek Okara's way back when and they definitely made a profound difference in the low end. If that doesn't work out, stuffing the ports is a great idea, there are a lot of online fellas who will sell you foam of exactly the same diameter and length as your ports on this speaker. But I would try the straw technique first and preserve the ported output. Of course using a calibrated mic would be best and measuring at your listening position, while varying the listening position and the loudspeaker position can be the most ideal way of getting a linear low end response. Especially with a speaker that has as prodigious an output as the VR4 in a room that might be a tad too small. YMMV. Best,Anand.
Anand,Are you referring to drinking straws? If so, I am not sure that any available straws would be as long as the port...would you use two "sets" of straws to get the desired length or could they be inserted part way?I'd like to try this with my VR4s.Thanks,Paul
Paul,Excellent point. Yes, classic white/black drinking straws. However, if your ports are too long, all bets are off (the length of the port on my Okaras was only 2 inches so it was easy). The straws have to be packed tight though, so that the overall diameter is very nearly the same. The whole idea is completely reversible. Just don't push the straws all the way down the port so you can't retrieve them from the enclosure! Best,Anand.
My memory of the VR4 manual is that it contained a lot of similar info on placement as the VR5 manual, since the size of both was comparable (identical?). If you can track down a 5 series manual then you will get lots of relevant info until such time as a copy of the 4 makes it to you. As I recall, for placement on the long wall, as you indicate will be your arrangement, the 5 manual talked of starting with an equilateral triangle, adjusting the size of this triangle to suit your room, with a 2ft space behind the speaker as a typical minimum and a different distance than this from the side walls, all without toe-in at first, then tweaking this as suits. That might be enough to get you on the way to seeing how best to work with your room. Good luck and keep us posted.
