In Reply to: Room sound vs direct sound posted by Duke on October 1, 2014 at 19:26:30:
A 4" cone begins to beam at 3.5Khz. So, what frequency should we roll the rear tweeter in at? 3.5 kHz or ~5 kHz? At 5k the rear tweeter would be down ~ 6db at 3.5 kHz as against the WR driver. Is that about right?Or is the Eq usually more complex than that? If yes, how to measure for it?
Do we need a level control for each rear tweeter? Constant-Z thingies?
Series or parallel connection with the main driver?
I have a pair of unused/NOS 1980's Foster/x 1" domes, 8ohms, 91db/w ~ the same as the Corals. They'd likely be fine at ~5khz with a 1st order slope, only just at 3.5K.
What about the Mangers to be used in the final build? They are flat bending wave drivers, 21cm across / frame diam? Will they need beaming compensation?
Thanks for your input.
Warmest
Tim Bailey
Skeptical Measurer & Audio Scrounger
Edits: 10/01/14 10/01/14
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Follow Ups
- Use a rear-firing tweeter equalized to offset the effects of the fullrange driver's beaming. - Timbo in Oz 22:34:45 10/01/14 (2)
- RE: Use a rear-firing tweeter equalized to offset the effects of the fullrange driver's beaming. - Duke 00:49:05 10/02/14 (1)
- Room Sound - Inmate51 07:43:01 10/02/14 (0)