In Reply to: Diffraction and front baffle and cabinet design posted by caspian@peak.org on April 17, 2012 at 10:47:05:
If you look carefully at the linked paper, you'll find that the responses in figure 15,16, and 17 (the rectangular box) have the best response. The sphere with offset tweeter (figure 6) is not a practical design and you didn't specify an offset driver which makes a significant difference as the centered driver on a more practical circular baffle (figure 8) is the worst case (which is what I was referring to).Additionally, I'm familiar with most of the people you cited above. Most of them are novices who routinely make ridiculous and inaccurate statements online with the exception of Mr. Krutke who is the closest person to being a professional in the industry and has actually designed and had manufactured an excellent mid bass driver. Anyone can work up a passive crossover and give the plans to a cabinet maker as some of the aforementioned "gurus" have done. I've heard their products and they all pale in comparison to those designed by true industry professionals at PSB, Revel, Canton, KEF, NHT, Vienna... etc - in some cases at a fraction of the cost. The more experienced companies routinely produce products with a much better balance of sensitivity, dynamics, spectral accuracy, and imaging coherence. Unfortunately, with modeling programs that generate transfer functions and response estimates based on rough dimensional parameters and raw driver responses - virtually anybody can build a speaker who has access to basic carpentry tools. Buying expensive Accuton or RAAL drivers doesn't make up for the lack of knowledge in acoustics or electrical engineering which is why some of the aforementioned manufacturers do a heck of a lot more for a whole lot less.
Edits: 04/17/12
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Follow Ups
- RE: Diffraction and front baffle and cabinet design - villastrangiato 11:59:56 04/17/12 (15)
- Really?!!!!!!!!! - Timbo in Oz 01:03:34 04/18/12 (11)
- RE: Really?!!!!!!!!! - villastrangiato 11:20:36 04/18/12 (3)
- For the record, Villastrangio continues battering his way through the fact - Timbo in Oz 17:35:11 04/18/12 (2)
- RE: For the record, Villastrangio continues battering his way through the fact - jimdgoulding@yahoo.com 22:49:21 04/18/12 (1)
- RE: For the record, Villastrangio continues battering his way through the fact - villastrangiato 04:39:08 04/19/12 (0)
- RE: Really?!!!!!!!!! - villastrangiato 06:30:23 04/18/12 (6)
- RE: Really?!!!!!!!!! - Mushroom Soup 04:33:12 04/20/12 (2)
- It doesn't have to be - badman 13:31:04 04/30/12 (1)
- RE: It doesn't have to be - jimdgoulding@yahoo.com 06:56:21 05/10/12 (0)
- Comprehension poor today? - Timbo in Oz 08:05:17 04/18/12 (2)
- RE: Comprehension poor today? - villastrangiato 08:24:59 04/18/12 (1)
- I did NOT suggest that subs suffer from diffarction effects, I was commenting that it is often stated that - Timbo in Oz 16:05:43 04/18/12 (0)
- RE: Dennis Murphy?? - chocolate_lover9999@yahoo.com 17:01:36 04/17/12 (2)
- RE: Dennis Murphy?? - villastrangiato 18:40:53 04/17/12 (1)
- RE: Dennis Murphy?? - chocolate_lover9999@yahoo.com 09:18:51 04/18/12 (0)