Name: RPG Acoustical Systems Uni-Protractor
Brand: RPG Acoustical Systems

About the Uni-Protractor

The Acoustical Systems Uni-Protractor is a high-precision tool designed for aligning and positioning phono tonearms and cartridges with exceptional accuracy. It supports alignment to any tangential curve desired, including standard curves by Löfgren, Baerwald, and Stevenson in both IEC and DIN norms, as well as the unique UNI-DIN tangential curve developed to reduce distortion in stereo stylus tracking. The Uni-Protractor allows users to measure and verify all positioning parameters related to the geometrical and mechanical alignment of cartridge-tonearm combinations, regardless of tonearm effective length or mounting distance. It includes a metal main frame with a micrometer linear drive, multiple spindle adapters, and a clear acrylic positioning arm for mounting distances from 8 to 14 inches. The system features a wide selection of templates for different tonearm geometries and offers precise, error-free single-point alignment. The UNI-DIN curve, exclusive to the Uni-Protractor and SMARTractor, accounts for the non-linear stereo groove and provides significant sonic benefits such as less distortion, more subtle details, and increased headroom in critical passages. This tool is essential for audiophiles seeking the utmost precision in analog front-end setup.

Specifications

- Supports alignment to multiple tangential curves: Löfgren A/B, Baerwald, Stevenson (IEC and DIN standards), and UNI-DIN. - Metal main frame with micrometer linear drive for precise adjustments. - Includes 3 POM spindle adapters for tonearm spindle diameters 7.10, 7.15, and 7.20 mm. - Clear acrylic positioning arm adjustable for mounting distances from 8" to 14". - Multiple locators including gun-metal pin and stainless steel pins with reticles for precise positioning. - Wide selection of alignment templates, including manufacturer-specific and universal standards. - Enables measurement and verification of tonearm geometry and cartridge alignment. - Designed for all pivot tonearms regardless of effective length or mounting position. - Allows single-point alignment with no error possible. - Compatible with UNI-P2S for precise mounting distance measurement (0.05 mm accuracy). - UNI-DIN tangential curve reduces distortion by 18-45% in the last two-thirds of the record groove. - Provides sonic improvements such as less stress on vocals, reduced grain, increased air, and more headroom.

Uni-Protractor

About the Uni-Protractor

Specifications

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