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In Reply to: RE: New side and rear surrounds - Magnepan, BG, Sunfire? posted by methylmarty on January 09, 2015 at 08:01:39
Since you want to keep your tonal balance allocation to the surrounds, AND you want to have something that is compatible with the ribbon tweeters on your mains, And you don't have room for stuff jutting off your walls, then that leaves only a BG model.
The one you picked out will match the ribbon for detail up to 8 khz or so which should do fine for both music and HT.
The 8" mid/woofer would not be as fast as the TIVA mid and midbass but BG have been rather successful in matching cones with planars for decades, so I would be more comfortable using cones sourced from them then from other makers. The freq coverage and dynamic capacity of the BG should match the MMGs hanging off your ceiling.
That said, I have not heard this particular model and have not heard the competition.
Follow Ups:
Satie,
I was hoping you'd chime in on this. When you say the BG ribbon will match up to 8khz, Do you think it will match the Tympani ribbon better than the current MMG does? What do you suppose it would do above 8khz versus what the MMG does?
Also, the BG ribbons are rated to 20khz, while the Sunfires I mentioned are rated to 40khz; how is this possible, or do you suppose it is just bloated specs as with other Sunfire specs? (Don't take that last comment as a knock on Bob Carver or Sunfire. I am a huge Bob Carver fan, my first serious receiver being an MXR130 and currently using Sunfire Sigs all around for HT. I just know that while most companies somewhat exaggerate specs, certain companies' specs tend to be... overly optimistic. lol)
The Neo8, which has the same diaphragm as the BG in wall's Neo3 PDR can be interchanged with the ribbon without a substantial difference in sound anywhere from 4khz to 10khz. Beyond that the ribbon is clearly more resolving and below that the ribbon tweeter is a bit out of its depth and turns nasty at high volume.
In my current low phase midrange setup the upper XO is at appx. 11Khz so that the ribbon does only top octave duties. Because of the lack of phase up to that point (and the transient critical 250hz-6khz) it sounds better than letting the ribbon operate to <6khz with 1st order slopes as I had it before.
The Neo3 PDR rolls over at 20khz because of its width being wide for a tweeter, not because it is "slow". It is more resolving than anything other than a true ribbon or electrostat, and possibly plasma tweeters. It should be on par with the better Be tweeters and better than some. So I expect it would outdo whatever Carver chose for the tweeter in his design.
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