Audio Asylum Thread Printer

Get a view of an entire thread on one page

FAQ / News / Events

Critic's Corner

That was NOT the fundamental premise!!!

108.34.204.30

In Reply to: RE: That's completely wrong... posted by Doug Schneider on July 21, 2024 at 12:58:13

I said "As far as I know," because I am familiar with only three such programs. "Auto-BSC" was not on any of the lists of features. I was talking about "Auto-BSC" and perhaps I was not emphatic enough on that. (I have no experience with the very expensive modules from Loudsoft.com. I am told that Harbeth uses those.)

I had a phone conversation with the designer of the program I believe to be the most respected package (X-over Pro version 3) and he said that it was not part of his software and that he did not envision it as a possible feature of any "Insert the data, press 'Process' and you get a crossover design" packages, because there are too many cabinet-related variables.

Regardless, my point was that Baffle Step Compensation, as important as JA and I (and apparently you) think it is, is not something that every loudspeaker designer thinks is worth the trouble.

I was surprised as all get-out when JA commented upon the apparent lack of BSC on a very expensive solid-rock-enclosure loudspeaker he was measuring. I thought that with all that money on the table, why no BSC?

"Though the response in the crossover region is flat, there is a broad peak in the upper midrange, which implies a lack of baffle-step compensation in the crossover. The tweeter's output between 5kHz and 20kHz is 3-5dB higher than it is in the presence region, almost matching the level of the midrange peak."

john

https://www.stereophile.com/content/acora-srb-loudspeaker-me (Open in New Window)

Follow Ups:

Not sure where you got this idea... - Doug Schneider 17:12:13 07/21/24 (2)
"...is not something that every loudspeaker designer thinks is worth the trouble."

I'm not sure how you can make a statement like that. That a designer doesn't think it "is worth the trouble"?

It's about the behavior of the driver when it is attached to a box. Baffle step isn't some magic -- it's an acoustic result as the driver goes from radiating from 4pi (free space) to 2pi (half space), because of the baffle it's now attached to.

On a freestanding loudspeaker, the choice not to compensate indicates not a design compromise, but a fundamental misunderstanding of how drivers work with their enclosures. Compensating is part of designing. And once again, this is an easy thing to model, even with a calculator and a piece of paper.

Doug
SoundStage!
- Whoa - John Marks 18:15:47 07/21/24 (1)
  You complained about:
  
  "I'm not sure how you can make a statement like that. That a designer doesn't think it "is worth the trouble"?"
  
  Did you read my reply, in the context of JA's statement about the Acora Rock Box???
  
  Are you privy to some double-secret explanation why the Acora Rock Box had no BSC?
  
  john
  - Nope, Didn't... - Doug Schneider 18:43:04 07/21/24 (0)
    Nope, didn't read your reply in the context of anything but what baffle step compensation is and why it has to be dealt with.
    
    Doug
    SoundStage!

Post a Followup:

FAQ

Post a Message!

Forgot Password?

Moniker (Username):
Password (Optional):
	Remember my Moniker & Password (What's this?) Eat Me
E-Mail (Optional):
Subject:

Message:	(Posts are subject to Content Rules)

Optional Link URL:
Optional Link Title:
Optional Image URL:
Upload Image:
E-mail Replies:	Automagically notify you when someone responds.

To view your new posting or follow-up, click on the RELOAD or REFRESH button on your browser.

This post is made possible by the generous support of people like you and our sponsors: