Clearaudio CARTRIDGE ALIGNMENT GAUGE IEC - Handbuch (Seite 6)

IEC Einstellschablone
Seite/Page 6  clearaudio electronic GmbH 2013
Additional setup information for the Clearaudio Tonearm Gauge
Never before the exact geometric adjustment of a tonearm with pickup was as easy
as this:
 The overhang and the offset angle are adjusted simultaneously at a single point.
This means an enormous ease compared to the up to now iterative procedure
with which the overhang and the offset angle were to be found seperately,
whereby the previous adjustment was most easily lost.
 The tonearm gauge can be universally applied for any pivot distance (distance
from turntable center to tonearm pivot). No compromises must be taken if there
is a deviation of the actual pivot distance from a nominal or calculation base
distance, thus enabling play for variations: If i.e. the headshell does not allow for
adjusting the necessary overhang, the pivot distance can be changed accordingly
or to obtain best tracking results you can try to find the maximum pivot distance
which is allowed by the headshell adjustment range.
 Because the predominant majority of records pressed for audiophile music
enjoyment is not cut to the minimal inner groove radius of 60.325mm admitted
by IEC standard, the reduction to a smaller modulated range allows for a better
optimization with audible sound improvement by less distortion. Only when
playing the inner rarely modulated grooves one accepts worse performance.
 By checking the smallest modulated groove radius of a large number of
audiophile records Clearaudio determined that the majority is not cut under a
radius of 75mm and therefore recommends the optimization of the tonearm
geometrie to be based on this tracking range and alternatively provides this
adjustment possibility by merely changing the orientation of the base plate and
the direction finder bar. This means: within this reduced range the maximal
distortion is almost half; at a radius of 72mm distortion is equal compared to the
optimization for IEC inner groove radius and only below this radius the distortion
increases (see diagram below).