Its geometry and construction ensure that difficulties with warped records, end of side distortion and temperature or humidity problems are greatly reduced. It incorporates a fixed headshell and an extremely stiff, light arm-tube. The low slung counterweight, used to adjust tracking force, places the mass in exactly the right position for both stability and minimum inertia and will remain set even when the arm-tube is lifted clear of the turntable. Arm-tops can be purchased separately to facilitate easy and fast cartridge changes without the need for realignment and recalibration.