I'm in the throes of bidding - so far unsuccessfully - for various older NAD
amplifiers on eBay.

I've not so far found a simple source of information on the features of
various models, and when they were made. NAD's own website has product
information sheets for some but not all models.

In particular, can anyone explain:

- what are the differences between, and approximate manufacturing periods
of, the original 3020, the 3020e and the 3020i?

- what is the difference between the 3020 series, the 3225 and the 3225PE,
and when were these last two made?

- from reading various newsgroup posts it appears that the 3020i and the 304
were perhaps being made at the same time (1993-1996). Is this true, and is
there some major difference between these two models?

Any information or pointers to online information gratefully received,

John Allen

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John Allen
Bofferdange, Luxembourg

http://www.homepages.lu/allen