Reed 3Q tonearm is dedicated for customers, who like to set up their audio equipment precisely using latest technology. Reed 3Q is equipped with laser, which allows to adjust VTA and azimuth very quickly and precisely (VTA precision +/- 0.1 mm, azimuth precision +/- 0.25 deg). It is very important after changing cartridges, because cartridge heights are different. As everyone may know, after every switch of cartridge VTF should be adjusted also. Using cartridges with high and medium compliance, VTA (SRA) should be adjusted every time after changing VTF. It is because VTF changes cause cantilever bending and changes of SRA. To get best sound quality, even after changing LP with different thickness (it can be from 0.8 mm to 3 mm), VTA should be adjusted accordingly.