In Reply to: Eureka! 100db from a 30L Cabinet - 65hz to 25khz posted by bcherry on May 10, 2010 at 00:21:45:
Why does the edge of the horn block part of the cone?
* First, the cone remains unobstructed. Only the surround is covered. Second, as the crossover frequency is at 600Hz the wavelength of the sound is around 57cm. Any obstruction that is much smaller than 1/4 of this essentially has no impact. The key is the distance between the horn acoustic center and that of the woofer. Due to the large size of both items the distance becomes quite large and approaches around halve the wavelength, so it needs to be minimised as much as possible to ensure correct integration between the drivers.
Given the nice chamfering around the main driver assembly, how does this 'lip' affect the sound?
* Not at all. The chamfering both around the driver cutout and on the edges has no sonic impact whatsoever. With only 18mm radius chamfering it only has any impact above around 5KHz, as has the overlap.
How critical is the distance between the drivers?
* The crossover would require re-design if the distance is significantly altered.
can the drivers be successfully pushed a little further apart to overcome this interference?
* They cannot be pushed further apart, but then again, there is no interference to overcome, so there is no need to.
DIY - Done Right!
This post is made possible by the generous support of people like you and our sponsors:
Follow Ups
- Crescendo: Customers Ask, "Why the overbite?" - bcherry 01:56:08 06/07/10 (0)