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In Reply to: RE: Chokes, again. Primarily for those who bi-amp and use them posted by johnvb on August 16, 2010 at 09:59:43:
A couple of observations.
1. I think to remember that PG reported no change when testing them, which I believe was, indeed, a series crossover. I may still have a chance to emulate the series xover with the speaker-level parts that I have. If so, it may take a couple of weeks (for me to have a "fair" testing environment). I'll let you know if I find something.
However, it would not surprise me that the difference is reduced in a series xover. Part of of the reason may be implied in Neolith's posting earlier, the first sentence. Furthermore, the reason I jumped for the chokes initially, seems to support Neo's logic.
At the time that I read about the chokes for the first time, I was still using Tazmon's "capless" tweeter tweak for my bi-amped MMGs. The "capless" tweak uses an inductor and resistors instead of capacitors. The downside, a tremendous waste of energy. The upside was, in my case, not just the best tweeter output I had had to that point. In ADDITION, there where notable gains elsewhere, primarily imaging.
I wanted to switch to a line-level xover but feared loosing the imaging attributes brought on by the "capless" tweak. Upon reading what Al's choke did, I saw lights in the heavens! In thanking Dawnrazor for his help with the very successful capless tweak, I wrote this in early March 2009:
"By what may turn out to be a happy coincidence, a few nights ago I encountered -- for the first time -- Al Sekela's choke tweak for the 3.6R Maggies. I now know that it has been around for a while. The thing that caught my attention was that the description of its effects by others, resembles my own experience with my adaptation of the capless for my MMGs...which kept the inductor, which is a choke... (So, I just received chokes of the type Al suggested and I may be even able to get some initial impressions this week.) "
Here was a great chance that this choke thing could do the same thing that the inductor in "capless" was doing with regard to imaging. IT DID!!!
Now, the series xover incorporates the inductor in a manner that may already provide part of the benefit. The only doubt I have about this is that, with the chokes on stock xovers, I've observed some of the benefit anyways. In these cases, a 5522 choke is at the input -- so, the low pass inductor see's it. I'll try to test as soon as I can.
2. I do suspect that, had I tried the chokes early on before my MMGs had improved to a certain level, I would have missed the improvements. Nowadays, after all that I have done, the difference is quite evident. So, wait for the break-in to run its course. Do the other tweaks. Maximizing positioning is key. Get used to how they sound. Then compare again.
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Follow Ups
- RE: Chokes, again. Primarily for those who bi-amp and use them - JBen 11:57:18 08/16/10 (0)
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