The Cyber-Spy.Com Usenet Archive Feeds Directly
From The Open And Publicly Available Newsgroup
This Group And Thousands Of Others Are Available
On Most IS NNTP News Servers On Port 119.
Cyber-Spy.Com Is NOT Responsible For Any Topic,
Opinions Or Content Posted To This Or Any Other
Newsgroup. This Web Archive Of The Newsgroup And
Posts Are For Informational Purposes Only.
From: "Arny Krueger"
References: <email@example.com> <3Sjh9.firstname.lastname@example.org> <0Aqh9.381$HT1.email@example.com> <3D868192.F61269AB@webaccess.net>
Subject: Re: Cancel speaker resistance?
Organization: www.pcavtech.com & www.pcabx.com
X-Newsreader: Microsoft Outlook Express 6.00.2479.0006
NNTP-Posting-Date: Mon, 16 Sep 2002 21:38:58 EDT
Date: Tue, 17 Sep 2002 01:38:58 GMT
"Chuck Simmons" wrote in message
> Arny Krueger wrote:
> > "GregS" wrote in message
> > news:firstname.lastname@example.org
> > > In article <0Aqh9.381$HT1.email@example.com>,
> > > Krueger" wrote:
> > >> "GregS" wrote in message
> > >> news:firstname.lastname@example.org
> > >>> In article , John
> > >>> Devereux wrote:
> > >>>> "Kevin Aylward" wrote:
> > >>>>
> > >>>>>
> > >>>>> I agree. A pure current drive would sound dreadful.
> > >>>>> inserting a resistance of the order of 4-10 ohms to mimic
> > >>>>> type output impedances has, debatable maybe, been
> > >>>>> to "improve" sound.
> > >>>
> > >>> I don't think output Z has anything to do.
> > >>
> > >> It does. It can effectively add an equalizer in front of the
> > >> electrical input to the speaker.
> > >
> > > I forgot about that. But each speaker load would change
> > > differently and sound different, but not necessarily go into
> > > tubed sound.
> > I've studied quite a few impedance curves, and they do strongly
> > to follow a pattern. Peak in the LF range dip, Peak in the
> > range, dip, peak at the high end.
> > http://www.pcabx.com/product/amplifiers/mag%20left_hi.gif
> The first two peaks are mechanical. The first peak is the first
> principle mode of the diaphragm and suspension. Very small speakers
> don't have the second peak which I suspect is due to the second
> principle mode of the diaphragm. The third appears to be electrical
> rather than mechanical because it is present in voice coils not
> attached to diaphragms. A voice coil with a stiff mass load and a
> suspension has only two peaks corresponding to the spring mass
> and to the self resonance of the coil and stray capacitance.
I guess I didn't mention that it's a 2-way speaker.
The midrange peak relates to the crossover, voice coil inductance of
the woofer, and the fundamental resonance of the tweeter.
Go Back To The Cyber-Spy.Com
Usenet Web Archive Index Of
The sci.electronics.design Newsgroup