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From: "Trevor Wilson"
References: <email@example.com> <firstname.lastname@example.org>
Subject: Re: Class B amplifiers: what are the large low-value resistors for?
Date: Fri, 15 Nov 2002 11:03:13 +1100
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"Phil Allison" wrote in message
> "Trevor Wilson" wrote in message
> > > >**Not in this universe. There is only one brand of commerically
> > > >loudspeaker, which APPROACHES a resistive load. That brand would be
> > Magnapan
> JW wrote:
> > >
> > > Not entirely true, I think. Some of the KEF models had/have Zobel
> > > networks to make their impedances almost purely resistive.
> > **Not quite. I believe the Zobels were for the upper bass, lower mids
> > lower treble. There were no Zobels to cover the bass humps.
> *** There was a version of the 104 that was resistive across the audio
> band. Series tuned circuits were used as conjugates to cancel out the
> bass humps.
> The impedance was 6 ohm + /- 10 % 20 to 20 K
**AFAIK, the Zobels were not applied to the bass section. I will be happy to
be corrected on this, by anyone who has performed the measurements. I have
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