"jaap" wrote in message
ll.nl...
honestguvnor schreef:
On May 11, 10:07 pm, max graff wrote:
I know that class A is the best in amplification however attaining
that level at higher wattage is only hypothetical.

This is not a wise statement. I am sure you will find quite a few
readers prepared to bet you cannot hear the difference between a
reasonable class A amplifier and a reasonable class AB driving a
reasonable loudspeaker.

I want to know what and how good is the supposed class D
amplification.

This is a good question (assuming "digital" amplifier of whatever
class and audibly neutral under normal conditions) . I do not know the
answer and given the absence of any reliable consumer audio
publications and the absence of reasonable specifications from the
manufacturers it is not obvious to me where to look for an answer.

Obviously one could perform experiments oneself but that would imply a
pretty awesome loss of basic technical knowledge about the performance
of consumer audio in these broadband www days.

Anyone?


Just an opinion: history shows that despite 'progress' amplification
quality diminishes every decade. Don't believe you can't do without this
new class. A good system dating from 1960 or 1970 or 1980 will beat any
plastic rubbish -whatever class- dating from 2007.

**What a load of bull****. Find yourself a system costing $X.00 in 1970.
Find yourself a similarly rated system, costing $X.00 in 1=2007 (allowing
for inflation) and listen. You will likely be surprised at the improvements.


The other day I demonstrated a nice turntable setup to someone who had
listened solely to digital audio. She was surprised by the reality coming
from old gear, despite S/N THD and whatever cyphers modern stuff tries to
sell to the public.

**So? All I see is that modern equipment is much cheaper than in the old
days. Here's my example:

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.


--
Trevor Wilson
www.rageaudio.com.au



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