HDSE stands for "Heavy Duty Special Edition" but it could also stand for "High Definition Special Edition." HDSE is identical in size and form to standard Rollerblock Jr. but has the following enhancements:
1) Top grade 7075 "aircraft" aluminum alloy body
7075 aluminum is harder than some steels and provides superior Brinnelling capacity (resistance to denting and deformation under extremely severe conditions) and superior mechanical coupling over 6061 aluminum.
2) Special "Hard Coat" anodized body and cup area
Hard Coat anodizing provides a thin, precision skin of ceramic hardness which constrained-layer damps the HDSE body, as in Rollerblock Series 2, and also retards wear in the cup area.
3) High precision Grade 10 Tungsten Carbide balls standard
Tungsten Carbide is the best material for use in ball bearing isolation devices; Grade 10 means that each ball meets or exceeds a sphericity and diameter tolerance of 10 parts per million, which is 2.5 times better than the best "off the shelf" ball bearings available. These are the same super-precision balls that are supplied with Series 2+ Rollerblocks, and are only bettered by the Grade 3 Superball (see below).
HDSE was originally developed for use with heavy loudspeakers (HDSE was first introduced in the Symposium Panorama loudspeaker), but offers higher resolution and enhanced bass performance over standard Jr. versions in non-loudspeaker applications such as digital players, analog turntables, preamps, amps, power supplies and conditioners, etc. It is second in performance only to Series 2+ Rollerblocks.
HDSE may also be ordered with State of the Art Grade 3 Superballs for maximum resolution.