RE: Re: [regsaudioforum] RE: DNM Wires
Like many things, it rather depends on the amount
The three ohm or so output impedance of a lot of
single ended triodes makes a big difference--since
the impedance of speakers is often not larger by much than
3 ohms(and may even be less). The output impedance
of the amp and the impedance of the speaker are
similar in size and things go all over the map as
But something like 0.3 ohms has, obviously , a much
smaller effect. Of course, 0,0 ohms is ideal. But there
is a big difference in the size of the effect between
0.3 and 3 !
I doubt that most people would find switching from
the essentially 0 voltage tap on the Carver Sunfire
and the 1 ohm "current source" tap to be a really
huge thing. Of course it is audible. And it is surely
enough to confuse one about the exact identity
of a speaker under review.
But in practice, when magazines reviewed the Sunfire,
quite a few people actually preferred the CurrentSource.
Of course it is wrong in a sense and it acts like
an erratic tone control. But it pleased a lot of people.
The point here is to know what is happening. Science
is information, not morality. It is very helpful to know
how things work--because if you don't, you cannot
arrange so easily what you want and moreover you cannot
defend yourself from people who are selling, whether
wittingly or not, items that cost a lot but do things that
could be done much more cheaply if one knew exactly what
But no one is obligated to do anything in particular
by scientific considerations. Science is a servant--
who enables you to do what you want. It makes
no sense to let science start ordering you around,
like a servant in Harold Pinter.
On the other hand, if you want to control frequency
response, it is easier to do it with an EQ --and more
predictable--than with a high output impedance.
Usually. For reasons that are obscure, people do
seem to like higher output impedance sometimes.
Maybe they like letting the speaker resonate a bit more.
PS Generally neutrality sounds better to me. But
recorded music is mostly pretty dismal stuff--very
few recordings are actually all that good--and I have
sympathy for people who want to fix them up somehow.
Trouble is that a coloration to fix them up tends
to sound after a while--or even really soon--like a
coloration laid on, not like an improved recording.
Too bad. It would be good to have a device that
actually would improve recordings. Closest you can
get is EQ that you can control.
---In email@example.com, <firstname.lastname@example.org> wrote:"Mention of the effect of resistance of such cables puts me in mind of a mention (in this forum?) that adding series resistance (3 Ohms perhaps?) to a transistor amplifier can make it sound like a valve (tube) amp."REG talks about this in his review of the Carver Sunfire amp. Carver supplies two outputs, current and voltage, the current having added resistance which indeed (I understand, though I haven't tried them on my Sunfire) make it sound more like a tube amp.Having discussed the science used - or mis-used - in the DNM speaker cables, what about the science involved in the DNM electronics; namely, the used of plastic for cases as opposed to metal? Or any other aspects of their electronics?Ned
- What is known about components added at either end of these cables?Fred.
From: HM <listentwice2002@...>
Sent: Tuesday, 1 October 2013, 10:04
Subject: [regsaudioforum] Re: DNM Wires
what do you mean by RC-filter?
Speaker cables have a timeconstant T=L/R and the DNM comes close to 10 which is pretty good.
> Isn't' that just increasing the R in an RC filter with the obvious consequences?