Ping Albert Einstein or Dale Earnhardt, Jr.

High Efficiency Speaker Asylum

Need speakers that can rock with just one watt? You found da place.

Hey Y'all,

My main stereo includes DIY speakers comprising the bass horns of Klipschorns and Oris 150 horns with AER MD3 drivers. Crossover, time/phase alignment, room correction, etc. is provided by a DEQX PDC 2.6P. I have purchased and am about to add Fostex T900A horn super tweeters to the mix.

I cross over bass horns to Oris horns at a nominal 160 Hz with electrical roll offs of 96 dB/octave low pass and 78 dB/8vo high pass. The crossover is as seamless and pleasing as any I've ever heard during thirty-four years as an amateur speaker builder.

I am planning a nominal crossover point of 7 to 8 kHz for the super tweeters. I have always accepted that a steep crossover roll off slope for frequencies this high is a recipe for disaster because of phase/time problems and other sonic gremlins. However I am wondering if this longstanding rule still holds true when the crossover is accomplished entirely in the digital domain with concomitant time alignment , phase correction, etc. as is possible with that marvelous boon to DIY speaker builders, the DEQX. The 96 dB/octave (electrical + acoustic) roll off on the bottom end of the midrange makes me wonder about the possibility of a 96 dB/octave crossover from midrange to super tweeter. The symmetry has a philosophical appeal. Many have opined that such symmetrical crossovers also offer sonic benefits.

An obvious way for most speaker builders to answer this question for themselves would be to simply try it and listen. However brain damage resulting from a head injury has caused me some serious problems with visual perception, visual learning and short term memory. This makes programming or altering the programming of my DEQX a remarkably slow, laborious and frustrating process for me. If someone with intellectual prowess of Albert Einstein or Dale Earnhardt, Jr. who has experience in this particular aspect of our great hobby would enlighten me it might save me a longer period of very difficult and frustrating (for me) work than you can imagine.

Thanks in advance to any helpful respondents.

Bye,
Don Reid

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

Signature Sound

[ Signature Sound Lounge ]

Topic - Ping Albert Einstein or Dale Earnhardt, Jr. - Don Reid 14:21:59 10/19/07 (3)

RE: Ping Albert Einstein or Dale Earnhardt, Jr. - Kloss 11:54:08 10/20/07 (0)

RE: Ping Albert Einstein or Dale Earnhardt, Jr. - weltersys 22:00:02 10/19/07 (1)

RE: Ping Albert Einstein or Dale Earnhardt, Jr.-Phase - Ivan Beaver 07:41:22 10/20/07 (0)

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.