Symposium introduced lateral ball bearing isolation with the original Rollerblock® in 1997; since then, Symposium's Rollerblock® Series 2 has been the standard of excellence for ball bearing isolation in the high end audio industry. Many rave reviews and customer comments reinforced their position as the premier ball bearing isolation device. However, it became evident that there was a need for a lower cost "introductory" ball bearing isolation device designed with the same audio expertise and commitment to quality as the original Rollerblock. Thus, Rollerblock Jr. became a reality.
Rollerblock Jr. consists of 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 center, making for easy setup. The bottom and top are flat and suitable for all equipment chassis, as well as flat surfaces and carpeting.
Rollerblock Jr. is effective with virtually all components, especially digital sources (CD players and transports), preamplifiers, and amplifiers, but can also be used to isolate and couple entire shelves and platforms, turntables, power supplies (including AC "line conditioners") and loudspeakers. Rollerblock Jr.'s virtues, like the original Rollerblock Series 2, are subtractive in nature. That is, rather than attempting to compensate for an existing problem or deficiency in a system through the introduction of new resonance, Rollerblock Jr. is designed (as are all Symposium products) to remove the cause of resonance and distortion. Footer devices and accessories should not create another problem by adding a new resonance; many will thicken bass and lower midrange with artificial bass overhang, lending a false "warmth" and impression of superior bass, which eventually becomes fatiguing, damaging timber accuracy and transient response of the entire music system.
For enhanced performance, select Rollerblock Jr + with superior Grade 10 Tungsten Carbide balls, or the best Rollerblock Jr. of all, HDSE, with Grade TC 10 balls, top-grade 7075 aircraft alloy body, and harder-than-steel "hard coat" black anodized skin.