how good are class D amplifiers?
 

"Serge Auckland" wrote in message
...

"Keith G" wrote in message
...

"Keith G" wrote

Fair comment, but what I am principally concerned with is 'normal
music' at fairly normal levels and remember I'm more vinyl than
digital. Anyway, I've posted a couple of fairly dire sweep tones
(not at all easy to do):

http://www.apah69.dsl.pipex.com/show/FidelioSweep.wav

http://www.apah69.dsl.pipex.com/show/TLS80Sweep.wav



Forgot to say I left the announcement of the *next* track on as a
'reference point'...!!

Are these a sine-wave sweep, white noise or pink noise? Reason I ask
is that the sweeps all droop towards the top end, the Fidelios fall
away drastically, so I'd like to know what is *should* look like.


No idea, Serge - track 44 on this disk:

http://www.apah69.dsl.pipex.com/show/SoundCheck2.JPG

how good are class D amplifiers?
 

In article , Keith G
writes

"Serge Auckland" wrote


I don't understand the statement about the woolly bass of the TLs, as
the IMFs have about the cleanest tightest bass immaginable.


Let me, at this point and for the moment, change that to 'woolliness in
the bass that is available from the TLs' - as I said earlier, much of
Classic *FM* is virtually unlistenable

Its a bloody mess on FM because they set the processor to make it sound
like a 50's radiogram!..
--
Tony Sayer

how good are class D amplifiers?
 

"tony sayer" wrote in message
...
In article , Keith G
writes

"Serge Auckland" wrote


I don't understand the statement about the woolly bass of the TLs,
as
the IMFs have about the cleanest tightest bass immaginable.


Let me, at this point and for the moment, change that to 'woolliness
in
the bass that is available from the TLs' - as I said earlier, much of
Classic *FM* is virtually unlistenable

Its a bloody mess on FM because they set the processor to make it
sound
like a 50's radiogram!..


So someone, somewhere thinks that what people want - the 'valve
sound'...??

;-)

how good are class D amplifiers?
 

"Dave Plowman (News)" wrote in message
...
In article ,
Trevor Wilson wrote:
**There is little anyone can do for seriously deluded individuals.
Single driver speakers (outside electrostatics) are utterly appalling.

Which electrostatic speaker uses a genuine single full range driver?

**Acoustats, for one.


BTW I'm agreeing with you about single driver speakers. ;-)

**How could any sane person not agree?


--
Trevor Wilson
www.rageaudio.com.au



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how good are class D amplifiers?
 

"Dave Plowman (News)" wrote in message
...
In article ,
Trevor Wilson wrote:
**There is little anyone can do for seriously deluded individuals.
Single driver speakers (outside electrostatics) are utterly appalling.

Which electrostatic speaker uses a genuine single full range driver?

**And Martin Logan. I'm sure there are others.


--
Trevor Wilson
www.rageaudio.com.au



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how good are class D amplifiers?
 

"Trevor Wilson" wrote in
message


S'funny, we keep getting told how 'good amps' don't have
a sound....???

**Because that is a fact.

A fact that you may quickly contradict.

The ideal amplifier has no 'sound' of it's own.

true.

No amplifier is ideal.

True, but that doesn't mean that there are no amplifiers that are sonically
transparent.

how good are class D amplifiers?
 

"Serge Auckland" wrote in
message


My reply was to illustrate that a SET/horn system was
capable of playing louder than a high power SS/TL system.

Can we develop any generalized knowlege from that?

I would hope that nobody tries!


I made no comment about quality. Afaiac, I would probably
prefer the sound of a loudhailer to the SET/horn, but I
would have to hear them under double-blind
conditions.....

SETs can be bad enough that the difference is so gross that the DBT could be
dispensed with, if nobody objected.

how good are class D amplifiers?
 

"Keith G" wrote in message
...

"Trevor Wilson" wrote in message
.. .

"Keith G" wrote


Speaker improvements? Try getting hold of a pair of cheap, 30 year old
Tannoys/Rogers/Quads/KEFs, just for starters....

**Actually, 30 years is too tight a limitation. I did say 40 years. I say
this, because I modded a pair of B&W DM7-II speakers a few years back.
After replacing the old caps and inductors, they sounded very good
indeed. They employed many of the characteristics valued in modern
speakers. They STILL sound bloody good.


Well there you go - that's a start isn't it?

**They're not 40 years old. They were less than 30. Before that, even B&W
weren't building speakers which had the characteristics of most decent
modern speakers. The DM7 was, AFAIK, the first electrodynamic speaker with
truly modern characteristics.


--
Trevor Wilson
www.rageaudio.com.au




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how good are class D amplifiers?
 

In article ,
Trevor Wilson wrote:
**They're not 40 years old. They were less than 30. Before that, even
B&W weren't building speakers which had the characteristics of most
decent modern speakers. The DM7 was, AFAIK, the first electrodynamic
speaker with truly modern characteristics.

I thought that accolade went to the Spendor BC1?

--
*What am I? Flypaper for freaks!?

Dave Plowman London SW
To e-mail, change noise into sound.

how good are class D amplifiers?
 

"Keith G" wrote in message
...

"Trevor Wilson" wrote in message
.. .

"Keith G" wrote in message
...

"Trevor Wilson" wrote


I own a Marantz Model 18 Receiver, dating from 1968. It originally cost
US$1,200.00 and was the most power receiver on the planet, back then.
For it's time, it was quite a sophisticated product, employing full
complementary silicon outputs, relay protection system and other nifty
stuff. It was critically appraised by reviewers at the time and when I
purchased mine (ca: 1977) I was stunned at how much better it sounded
than many contemporary amplifiers of similar (60 Watts) or even more
power. Just for yuks, I recently compared it to a more modern Marantz
amplifier (cost around AUS$1,000.00). No comparison. The modern amp was
somewhat better sounding. And, allowing for inflation, the modern amp
was MUCH less expensive. Don't even get me started on loudspeakers. The
technology for designing speakers has improved in leaps and bounds over
the last 40 years.



S'funny, we keep getting told how 'good amps' don't have a sound....???

**Because that is a fact. The ideal amplifier has no 'sound' of it's own.
No amplifier is ideal.


Therefore no amplifier has no 'sound' of its own then?

**Nope. That's not what I said.


--
Trevor Wilson
www.rageaudio.com.au



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