"John Smith" wrote in message
...
Hi,

Is there any real difference between Technics model numbers ending A and
D,
for example, the CD players SL-PS670A and SL-PS670D (except the years they
we produced)?


No idea, but this site might give you a clue:

http://www.vintagetechnics.com/menu.htm



What is AA all about (my ST-GT550 tuner apparently has AA output)?


Interestingly, this was my first post to this group - I asked the same thing
and got no response. (Usually the way - I've got another unanswered question
hanging in the breeze, as I type!)

The best explanation I got was from the manual that came with a Technics amp
I had a while back. It appeared to come from the fact that the amp was
described as being split into two halves with mosfets in the 'signal
section' and bipolars in the output section, both of which were describes as
running in Class A, at least for a while in the Output section. Don't really
know what it was all about, the amp was most definitely not a Class A amp
and was very bland-sounding and disappointing for Technics kit!



Has Technics stopped making hi-fi separates? Looking at Panasonic/Technics
sites I can only see complete hi-fi systems.


I believe so - I was told by a local repair technician that Technics stuff
had recently been dropping lower and lower in quality until Technics no
longer wanted to play the 'cheapjack' game and finally rolled over!! If
true, it's a shame because I suspect there's a greater following for good
Technics gear than they perhaps might realise - but for decent kit, not the
'flyaway' empty boxes that are standard issue nowadays....??