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Thanks Jim. I've paid a lot of attention to your posts, both here and 'elsewhere', concerning your

experience with maggies, and they've been interesting and thoughtful.

Lets see-is the radiating panel 'set back'? Yes, but only about 3/16". My thought process was to set it back far enough to keep the screw heads from protruding past the frames, and possibly interfering with the grills. In reality, the nature of the grill 'guides' holds the grills proud of the maple frames just about the same amount, so I could have just flushed the drivers-ah well. Still, I don't think being recessed that small amount hampers the sonics much, if at all. Though now that you've brought it up I'll probably put a round-over on that square edge before I finish them. Can't hurt. (-:

I don't notice any 'tunnel' issues with the back wave, but that's tough to correlate in a scientific way since a) there's so much about the sound that changes once you've installed the drivers in modified frames like this that it's very difficult (at least for me) to process what aspect of the new frames is causing what changes to the sound. And b)unless someone has the time and desire to produce several prototypes of various designs, you sets your goals, designs your design, and jumps in head first. More about this below, but first...

I hear no difference sonically with the brace absent or in place. As I said, if I were do it again, I might base my decision on 'brace or no' on aesthetic concerns, not sonic. But I'm still nervous about providing as stiff a surface as possible for the driver to reside-I want the mylar to vibrate as 'accurately' as possible within a stiff frame, so the brace provides a last bit of sonic-peace-of-mind. Interestingly, the speakers look at least as good to me with the brace as without.

Saying that about the brace, and with reference to the rear pole piece 'set back', since the dipole wave is by nature reflective, having well-tuned front and side walls, like yours, may very well show sonic anomalies that I just can't hear. My listening room is also my living room, so trade offs relative to the ultimate livability of the space have to be made. I think the 'irregular' front wall surface (records, books, open shelves ) helps, the coffered ceiling helps, the fireplace hurts (but I'm not going to not have a fireplace because my stereo will sound better).

In the end, the way I listen to changes I've made to the room or the equipment is to, for the first couple of weeks at least, not focus on the 'audiophile' stuff, but to ask myself one question: has this change heightened or decreased my enjoyment of the music coming out of my speakers? It's only then, when I've given the change a thumbs up or a thumbs down, will I try to zero in on what is causing the joy or the pain. In the case of these mods, it's a big thumbs up.



"Dammit..."

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  • Thanks Jim. I've paid a lot of attention to your posts, both here and 'elsewhere', concerning your - powermatic 06/2/0816:02:49 06/2/08 (3)
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