Hi, Jeff,

What's wrong with the internal preamp on the A807? (I have my own pet
peeves, but I'm wondering why you're going the external route).

AME was never a consumer format, so I would dismiss that. I am one of a
handful of people equipped for AME reproduction on current equipment, and
I've supplied some of the AME filters to other transfer houses. You'll find
it on 2- and 3-channel masters from the 1960s at 15 in/s. See the info at

CCIR is widely used in Europe, but I doubt (m)any of your tapes will be
that format. A stock A807 can be set up to switch between CCIR and NAB.

Please note that at 3.75 in/s, there is no difference between U.S. (NAB)
and European practice. Again, see the MRL Web site. The table on page 3 of
the "Choosing and Using..." document indicates that the IEC EQ was used
only in professional circles in Europe. Consumer machines and pre-recorded
tapes worldwide apparently followed the NAB standards.



At 03:44 PM 11/15/2004 -0600, you wrote:
>I'm getting a Studer A807 fitted out for archival use and plan to use an
>external head preamp. I've been asked what EQ curve I'd like to use (NAB,
>CCIR or AME) but am not sure what curve, if any, was used for consumer open
>reel decks and/or commercially duplicated reels? Most of what I'll be
>working with is 2 and 4 track reels at 7 1/2 IPS, with about a 50/50 mix of
>consumer recorded and pre-recorded reels. In cases where I have recording
>deck info it's generally machines such as older Teac A series, Sony and Akai
>units of '60s vintage. Any help is greatly appreciated.
>Jeff Kane