"paul packer" wrote in message
...
On Sun, 25 Mar 2007 15:42:09 +1000, "Trevor Wilson"
wrote:
"paul packer" wrote in message
...
On Sat, 24 Mar 2007 12:31:23 +1100, "Trevor Wilson"
wrote:
wrote in message
egroups.com...
hi
i have a YAMAHA RX-300U natural Sound AMPLIFIER
i would like to replace some of the component with better pats.
any sugestion? this amp is only 2 X 37 chanel
any idea ?
**Replace it with a Rotel.
Not necessarily an improvement, Trevor. I have a Yamaha RX-485
**BZZZZT! How long has the RX-485 been identical to a Rotel?
How relevant is it to compare a Rotel to a Yamaha, when using headphones
if
the vast majority of people listen via speakers?
receiver and it sounds brilliant--better than the several budget
Rotels I've had.
I'd ask the OP why he feels the need for better compontents. What does
he feel the sound is lacking?
**He probably uses speakers. Rotels are designed to operate with speakers.
Yamahas work better with dummy loads.
Says you and how many others?
**Everyone who has measured them.
I cite the following on the RX-485:
"One company that does make high-current receivers for those on a
tight budget is Yamaha. Rated at 65w/ch continuously into 8 ohms, that
power goes up to 70w/ch for 6 ohm loads like the Mini-Reference.
**Big whoop. From 65 Watts to 70 Watts. A theorectically perfect amp will
run to around 85 Watts. The Yammay falls well short of ideal.
And
the dynamic power output figures really show greater
capabilities--into 8/6/4/2 ohms respectively, IHF rated dynamic power
is 96/115/135/150 watts/ch (and all these are full 20hz-20Khz
bandwidth ratings, unlike the cheating I've seen some companies do by
only measuring their amplifiers driving a 40hz+ signal).
**Except that dynamic power ratings are worse than bull****.
This sort of
output, with power going up into lower loads, is a characteristic of a
good design with a good power supply.
**No, it is not. It is just that dynamic power figures make good copy for
people who have no idea about what they're talking about. Like the author.
Receivers without dynamic
headroom, and those that have their power drop dramatically below 8
ohms, are not recommended for driving real speakers no matter how high
their wattage figures may be."
**Utter, banal bull****. The author needs to contact the following companies
and tell them how bad their amps a
Krell
Mark Levinson
Rowland
ME
Et al.
All the above amplifiers enjoy vanishingly small dynamic headroom figures.
The 'ideal' amplifier has a dynamic headroom figure of 0dB. As amplifiers
become worse (IE: Cheaper power supplies are used) then the dynamic headroom
figure rises as well.
from this link:
http://www.soundstage.com/entry01.htm
**Keep reading that nonsense Paul and you'll never learn anything. The
author clearly has no idea. My comments about your use of headphones remain.
The use of headphones invalidates your claim to knowing how an amplifier
sounds, for the vast majority of uses that the amplifier will be put to.
--
Trevor Wilson
www.rageaudio.com.au
--
Posted via a free Usenet account from
http://www.teranews.com