Anyone using a new Prefix?

Posted by: Dave J on 16 March 2004

I'm on the hunt for a phono stage.

I have to say that the K cards in the 52 are performing far better than expected however RFI has become an issue since upgrading from an 82. As RFI was known to be a problem with earlier Prefixes, I'm keen to know if this has been resolved in the latest version as has been claimed. Anyone using the new version?

Dave
Posted on: 16 March 2004 by Top Cat
As a corollary, is RFI more of a problem with old prefixes (prefii?) than with internal boards? I've secured a Prefix K via a contact but haven't got it yet and I'm curious whether or not to have it sent on to Naim for the upgrade...

John
Posted on: 16 March 2004 by MarkEJ
quote:
Originally posted by Top Cat:
...old prefixes (prefii?)...


Prefices. (careful how you say it) Smile
Posted on: 16 March 2004 by Willy
quote:
Originally posted by Dave J:
I'm on the hunt for a phono stage.

I have to say that the K cards in the 52 are performing far better than expected however RFI has become an issue since upgrading from an 82. As RFI was known to be a problem with earlier Prefixes, I'm keen to know if this has been resolved in the latest version as has been claimed. Anyone using the new version?

Dave


Dave,

I resolved most of my RFI problems with the prefix by routing the earth lead to a spare din on the supercap. Thereafter I would get a bit of what I believe to be Spanish radio breaking through. Since upgading to the new spec last December I've heard nothing.

Regards,

Willy.
Posted on: 16 March 2004 by Eric Barry
In my experience the old Prefix is more vulnerable than the corresponding cards--probably the thinner case provides less shielding.

--Eric
Posted on: 16 March 2004 by Dave J
Eric,

That's interesting and would certainly dissuade me from buying an older unit. The last thing I want to do is make matters worse.

Willy,

Other than the reduction in RFI were there any other noticeable improvements?
Posted on: 16 March 2004 by Jo Sharp
Older Prefixes can be modified to cure/reduce the RF problems. It also gives improved sound quality as well, so even if you didn't have an RF problem before it is probably worthwhile. Phone your dealer or the Service dept at Naim for details - I think it costs about £80.

Jo
Posted on: 16 March 2004 by smike42
I've got as new prefix - and haven't noticed any of my old RF problems

Smike
Posted on: 16 March 2004 by jpk73
Confused Will the upgrade of the Prefix change it's case? Confused
Posted on: 17 March 2004 by sean
Jun,

I've had mine done and it keeps the same case.

Sean.