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In Reply to: RE: the ones? posted by hifitommy on November 14, 2020 at 10:02:17
It's interesting that the Fried R and Dynaco A25 loadings(which came from the Scandinavian variovent research; indeed the A25 was made in Scandinavia) are variations of the same concept. This is especially true since coincidentally Bud Fried and David Hafler were best friends. However I think the line tunnel version came via the IMF Super Compact design done probably by John Wright, the IMF designer.
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I spent Many an hour in front of the IMF Monitor IIIs improved. the same friend got the RIIs also. the IMFs never needed a sub (of course) but the RS do for sure.
Wright's deigns continued with the Tesla, I would love to hear them.
...regards...tr
The RIIs in my listening room do not need a sub.
The problem is not that there is evil in the world, the problem is that there is good. Because otherwise, who would care?
well, they are satisfying but they don't go down to below 35Hz which may be 6 or more db down. i am used to listening to my friend's big IMF monitors which are FLAT to 16Hz. i just bought and installed a Rythmik sealed 12" servo sub that goes down to 15Hz and i am quite pleased with their musical tonality all the way down like the IMFs.
this is with my Spendor S3/5s. i once had the rogers LA3/5As but found that properly mating a sub was nigh impossible. the flatness of the Spendors in comparison made it possible.
so i have 3 sets of speakers i can rotate, the Rs, Spendors, and MMGs. all need extension at the bottom.
...regards...tr
Maybe one or two. Not enough to justify setting up the sub.
The Maggies will go down to 50, and they don't need a sub either. IN fact, the sub always seemed like overkill in my listening space.
I listen more to how well the bass is articulated. How fast is it? Can I hear the wood of a string bass? Does the kick drum get me in the solar plexus?
If the answer to all is "yes," then the sub stays in storage.
The problem is not that there is evil in the world, the problem is that there is good. Because otherwise, who would care?
same driver, different bass loading, a good transmission line can go lower. A properly done variovent/line tunnel should do all but the last octave(most of classical music except organs) with exceptional bass control.
the TDL didn't use the B139 but a similarly shaped ~9x13 CONE with dust cap, not a FLAT diaphragm as on the KEF.
the RII does a nice job with the line tunnel. i was able to compensate with only a bit of boost on the bass control on my SP3a1 preamp.
...regards...tr
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