For Sale Symposium Acoustics Rollerblock Jr.+ Isolation Devices

Further Information

Rollerblock Jr. consists of 6 tops and bottoms and 3 center bearings, to make 3 "Double Stacked" isolator/coupler units. Each top and bottom is constructed of black anodized, aircraft alloy aluminum, and has a 1.875" diameter (4.76 cm) and 5/8" (1.58 cm) thickness. These dimensions were carefully chosen to make Rollerblock Jr. easy to use and set up, yet strong enough to withstand the rigors of use under heavier equipment such as large amplifiers and heavy loudspeakers. The special cup interior has been designed so that the top and bottom "sandwich" is stable with the ball inserted in the centre, making for easy setup. The bottom and top are flat and suitable for all equipment chassis, as well as flat surfaces and carpeting.

The standard Rollerblock Jr. is supplied with 3 chromium steel balls (Grade 25, each exceeds a sphericity and diameter tolerance of 25 parts per million). The "Rollerblock Jr.+" includes the same tops and bottoms but with the super-precision Grade 10 Tungsten Carbide balls.  What I am selling include the Grade 10 Tungsten Carbide balls, which makes them the Rollerblock Jr.+  As opposed to chromium steel balls, Tungsten Carbide balls provide better bass, lower background noise, more definite imaging specificity, weight, and greater musical authority. 

Proper installation results in increased transparency, dynamics and musicality, properties which include better harmonic separation and reduction of vibration-produced excessive sibilance. Further, one may expect to discern greater clarity between instruments in the sonic field, and better defined bass performance with more accurate timbral balance.

Note: I have two sets of these that I wish to sell, hence two separate ads.