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RE: I'm using the funky Grace alignment

> I've got no inclination to try to re-align to Lofgren (I'm sure the thought of this alignment would drive John Elison nuts).

Wrong! This alignment wouldn't drive me nuts but I believe that the 66-mm/120.9-mm Lofgren "A" null-point alignment is slightly better. It's a matter of opinion, though -- a trade-off, if you will.

The red distortion curve is the important aspect of all alignments. It's weighted in the sense that it means the same regardless of where on the LP it displays distortion. In other words, when the red line indicates 1% distortion on an inner groove, it's the same 1% distortion as on an outer groove. You can see from the blue tracking error curve that it requires more tracking error on an outer groove to produce the same level of distortion that less tracking error produces on an inner groove.

At first glance, it appears that the Grace alignment is the better alignment. However, the Grace alignment produces significantly more distortion on the first 25-mm of outer groove area. Consequently, the first couple of songs on every record you play will have greater distortion than the 66-mm/120.9-mm Lofgren "A" null-point alignment that I prefer. After that, there will be slightly less distortion throughout the remainder of the record.

All alignments are basically a compromise. Consequently, if you can put up with more distortion at the beginning of every record in order to get slightly less distortion on the remainder of the record, then the Grace alignment is a good one for you. On the other hand, the 66-mm/120.9-mm Loefgren "A" null-point alignment limits the maximum distortion on outer grooves to be the same as the maximum distortion on middle grooves and inner grooves. In my opinion, that makes more sense. It's a trade-off, though! YMMV


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