Commonly called a Castle arrangement. Back firing like the BD-Pipes (our very first FR build), and th eflat top (like the English Castles), but somewhere between 10-15° has been deemed most useful.
Original thread: https://www.diyaudio.com/community/threads/microtower-bipolar-ml-tl-for-chr-70-or-el70.148901/
Lots of other threads on them, inclkuding some good build threads.
dave
I heard the 901s back in the 80s and wasn't too impressed. The guy had the eq box and was playing music from a reel to reel. After hearing a pair of Thiel speakers at a party back then, nothing sounded good anymore.
Up to that point, I had heard B&W, KEF, Infinity etc.
Up to that point, I had heard B&W, KEF, Infinity etc.
Here's my 901-1 outdoors - one driver - 8 driver - 8 near wall- no
Eq. IIRC Bose referenced Karlson's "Aural Optics" patent.
Eq. IIRC Bose referenced Karlson's "Aural Optics" patent.
Interesting, but that’s not how they are supposed to be used. Which brings up the question of how does one go about measuring such a loudspeaker? Omni mic in an upper-middle class living room I guess? Simply blasting midrange everywhere doesn’t work as well as blasting it off the 1980’s paneling?
Back when we had a strong dollar and a crate of reasonably good Tang Bands (or is it Tangs Band?) could be had for $35 each I thought about re-creating the 901’s to see what the fuss was about. Life got in the way.
I don’t think you can do a 901 with three 12” drivers. That won’t have the same direct-reflect ratio the 901’s had.
I’ve also thought about using reflected sound (the back outside of the 901’s) to improve the surround effect in shallow rooms. I’ve been somewhat successful in using speakers placed lower than ear level to get good left/right, but I can’t get the back wall to disappear. Testing will continue after the eclipse.
I don’t think you can do a 901 with three 12” drivers. That won’t have the same direct-reflect ratio the 901’s had.
I’ve also thought about using reflected sound (the back outside of the 901’s) to improve the surround effect in shallow rooms. I’ve been somewhat successful in using speakers placed lower than ear level to get good left/right, but I can’t get the back wall to disappear. Testing will continue after the eclipse.
This is exactly my experience. Particularly what is in your parenthesis. Checking your link I think 10ms is a little to late - I would suggest 1,5-2 perhaps - but what not experiment here!?
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