1 pound CNC-machined alloy outer record ring , made by TTW Audio.Here's a video of the ring in use (shown being used with their copper platter mat): https://www.youtube.com/watch?v=XnzDGGAmtDo Includes centering device; original carton w/sleeve & cushioning material; Excellent condition. From the manufacturer's website: "TTAlloy 480 Classic Outer Ring Universal Price: $368.20 Availability: 4 week delivery Prod. Code: TTAlloy 480 Classic Ring Universal Universal Fit Kg's 0.48 Lb's 1.06 # Discs/Bullets 0 % copper 0.00 Material and Style Alloy Alloy This ring is designed for light to light/medium tables with 2Kg or heavier platters and provides excellent coupling and flattening of standard vinyl and will remove some of the warps from mildly warped 180 – 200 grams records. The sound is superb when used with the correct turntable; it is not too heavy for most turntables and provides a dramatic improvement in the sound of the record. The outer ring provides dramatic improvements to the records imaging and sound staging reducing high frequency distortion caused by microscopic vibration in the record groove. Benefits *Flatten and couple ANY record (see each ring in the catalogue for specific details) *Will make old worn vinyl sound 100% better and reduces pops and clicks *Dramatically reduces background noise up to 10 dB in noise reduction measured results *Improves cartridge tracking and stabilizes the VTA of the Stylus *Improves soundstage by more accurate record tracking/massive dynamics/VTA stabilization *Secondly the tone arm is stabilized and the “shock absorber” characteristics are minimized * The lowest resonant frequency of any ring ever produced *Powerful lively controlled sound *The ring sits in the edge of the LP and the ring NEVER touches platter *Improved turntable speed (increasing by weight) Stylus Clearance The top surface of the ring is less than .014 (.38 mm) higher than the LP surface providing excellent clearance for the most Stylus on the entry groove of the record with manual and automatic turntables. The very thin walled areas make the machining extremely difficult. To make a ring this size, perfectly flat and concentric, we use advanced plasma and laser cutting CNC’s and MULTI AXIS CNC Lathes. Each ring is produced by a senior Aerospace Machinist. The rings are flat and concentric less than .004 of an inch over the entire ring, not an easy task. The Setting Tool Our unique centering tool is included for easy installation, 5 second installation time This device is designed to locate the Outer Ring Concentric to the Platter centerline with 5-6 thousands of an inch. Literally a 5 second installation time and it is dead simple. Provides a storage platform for the Outer Ring when not in use"
| 
