From: "Arny Krueger"
References: <firstname.lastname@example.org> <3Sjh9.email@example.com>
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 15:48:12 EDT
Date: Mon, 16 Sep 2002 19:48:12 GMT
"GregS" wrote in message
> In article , John
> Devereux wrote:
>> "Kevin Aylward" wrote:
>>> I agree. A pure current drive would sound dreadful. However,
>>> inserting a resistance of the order of 4-10 ohms to mimic tube
>>> type output impedances has, debatable maybe, been considered 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.
>Its more of the
> harmonic content of the amplifiers making the sound.
Based on what I've learned about changes in harmonic content due to
nonlinear distortion from
http://www.pcabx.com/technical/nonlinear/index.htm , it takes lots of
nonlinearity to actually change sound quality. Nonlinear distortion
often increases with loudness, meaning that it is not as noticeable
at low levels.
In contrast, changes in frequency response are about the same at all
>Increasing impedances within the amplifier also can change the
Depending where you increase the impedances, the results can vary
over a wide range of effectiveness and audibility.