Soundstage and depth of image
 

On Fri, 18 Aug 2006 09:17:10 +0100, Jim Lesurf
wrote:

Alas, manufacturers often feel obliged to bring out a 'new model' - if only
to get mentioned in the magazines via a round of 'reviews'.

Why the quote marks? They are everyday words used with their normal
meaning.

Soundstage and depth of image
 

In article , Laurence Payne
lpayne1NOSPAM@dslDOTpipexDOTcom wrote:
On Fri, 18 Aug 2006 09:17:10 +0100, Jim Lesurf
wrote:

Alas, manufacturers often feel obliged to bring out a 'new model' - if
only to get mentioned in the magazines via a round of 'reviews'.

Why the quote marks?

To recognise the fact that the 'newness' may simply be a matter of moving
the deck chairs around. So may be 'new' in name, but not always in terms of
useful performance.

They are everyday words used with their normal meaning.

Which, alas, can be manipulated by the PR/sales team to mislead people.
:-)

Slainte,

Jim

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Soundstage and depth of image
 

"Laurence Payne" lpayne1NOSPAM@dslDOTpipexDOTcom wrote in message
...
On Fri, 18 Aug 2006 10:58:20 +0800, "Alan Rutlidge"
wrote:

I have two multi-channel power amps which just after the 5 year warranty
ran
out developed exactly the same fault (within a week of each other) in
exactly the same channel (left-rear). The in-built protection fortunately
activates protecting the speakers from damage as the output gets stuck
hard
to the -ve supply rail. No components are faulty but exactly the same PCB
tracks develop dry joints which produced the fault. I just wish I knew
more
people with the same model amp to compare notes to see just how widespread
the same fault may be.

Well, perhaps if you divulged the make and model you MIGHT get to know
more people with the same amp!

WHY are people so coy about the very information that would make a
post worthwhile? :-)

Well Laurence, if you had cared to read the reply I made to TW's post of the
18th August and to which you did indeed reply the following day (to TW's
post); you would have seen that I not only identified the make and model of
amplifier in question but also described the cause of the fault in the first
place.

Obviously you have overlooked that particular post of mine.

For your benefit I've copied and pasted my reply below -

**** Sony TA-N9000ES 5 channel power amplifier (introduced late 1998 - early
1999??) and last of the ES separates before they started rolling out the new
integrated digital HT receiver crap.

The fault is common on both units to the left rear channel. There is a
Class A cascade section that uses 3 surface mount small signal bipolar
transistors. In both cases none of the semis were faulty but dry joints /
hairline fractures in the very narrow tracks in the underside of the PCB
associated with this part of the circuit were identified as the cause of the
fault. The fault causes the output of the LR channel to go full voltage to
the -ve supply rail, which causes the protection circuitry to operate
isolating the load from the amplifier's output. The visible flashing of the
power LED indicates to the user a serious fault has been detected. ****


Cheers,
Alan

Soundstage and depth of image
 

"Laurence Payne" lpayne1NOSPAM@dslDOTpipexDOTcom wrote in message
...
On Fri, 18 Aug 2006 13:34:17 +1000, "Trevor Wilson"
wrote:

**Which brand and model?

And, of course, the same question to you?

**WRT to the manufacturer's distributor, for whom I was service manager, it
was Marantz. The most reliable Marantz model (up to around 1977) was the
Model 1070. The least reliable, was the 4270. The most costly product to
Marantz was the Model 500 power amp. I own one. I couldn't resist a bargain.
The company simply refused to sell the remaining stock to the public. The
other brand and model I decline to disclose.


--
Trevor Wilson
www.rageaudio.com.au




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