RESONANCE CONTROL CONCEPT JEWEL

DESIGN

All record weights and clamps known to us are simi­lar in their basic cylind­ri­cal shape. With JEWEL, we have imple­men­ted a dar­ing design con­cept and deve­lo­ped the first asym­me­tri­cal reso­nan­ce con­trol con­cept. Alt­hough the outer con­tours of the body, mil­led from solid stain­less steel, are asym­me­tri­cal, in num­e­rous com­pu­ter simu­la­ti­ons we have mana­ged to achie­ve one hundred per­cent even weight distribution.

With our three-point approach, we have deve­lo­ped a uni­que reso­nan­ce con­trol con­cept. The com­bi­na­ti­on of a shaft seal, brass rods and Sor­bo­tha­ne dam­ping ring mini­mi­zes the cont­act points with the turn­ta­ble and the record while allo­wing the ener­gy of unwan­ted mecha­ni­cal noi­se and vibra­ti­ons from the record play­er and the record its­elf to be absor­bed and neutralized.

Ramar’s Record Stand was also desi­gned as addi­tio­nal pack­a­ging pro­tec­tion for the reso­nan­ce con­trol con­cept. This makes the pack­a­ging safer and more sus­tainable. When you purcha­se JEWEL, the Record Stand is included.

THREE-POINT APPROACH

• JEWEL is moun­ted to the spind­le via a so-cal­led shaft seal. The uni­que design of the shaft seal ring ensu­res a sta­ble con­nec­tion with the spind­le. The ela­s­tic coa­ting of the ring neu­tra­li­zes the vibra­ti­ons, that might be trans­mit­ted via the spind­le. At the same time, the expan­da­ble NBR rub­ber coa­ting allows JEWEL to be used on a wide varie­ty of record play­ers with dif­fe­rent spind­les. The mate­ri­al NBR (nitri­le buta­die­ne rub­ber) is an elas­to­mer with excel­lent mecha­ni­cal pro­per­ties and has high abra­si­on and ten­si­le strength. The­re is a coil spring around the cen­ter hole insi­de the shaft seal that ser­ves to addi­tio­nal­ly sta­bi­li­ze the spind­le mount. 

• Eight brass rods are sus­pen­ded inde­pendent­ly of each other in the body. As soon as JEWEL is pla­ced on the record, the rods plun­ge down and gent­ly touch the sur­face. The­se trans­mit some of the reso­nan­ces insi­de JEWEL, whe­re they are eli­mi­na­ted. The sus­pen­si­on allows the indi­vi­du­al rods to adapt per­fect­ly to any dif­fe­ren­ces in height of the record sur­face cau­sed by dif­fe­rent label struc­tures. This ensu­res that the cont­act sur­face of the brass rods remains con­stant for all records.

• In col­la­bo­ra­ti­on with Sor­bo­tha­ne Inc., we have deve­lo­ped a uni­que Sor­bo­tha­ne dam­ping ring. This was deve­lo­ped accor­ding to our spe­ci­fi­ca­ti­ons for the func­tion, mass and shape of JEWEL and ensu­res balan­ced dam­ping of unwan­ted vibra­ti­ons and reso­nan­ces from records.

Sor­bo­tha­ne is a pro­prie­ta­ry, vis­coela­s­tic poly­mer. Vis­coela­s­tic means that the mate­ri­al has pro­per­ties of both liquids and solids (ela­s­tic mate­ri­als). Sor­bo­tha­ne com­bi­nes shock absorp­ti­on, good memo­ry, vibra­ti­on iso­la­ti­on and vibra­ti­on dam­ping. While many mate­ri­als have only one of the­se pro­per­ties, Sor­bo­tha­ne com­bi­nes all of them in a sta­ble mate­ri­al with a long ser­vice life.

IMPORTANT

In order to be able to use JEWEL pro­per­ly, you need a visi­ble (abo­ve the sur­face of the record) height of the spind­le bet­ween a mini­mum of 6mm and a maxi­mum of 20mm. With a lower or hig­her spind­le length, the desi­red hori­zon­tal pla­ce­ment of JEWEL can be enorm­ously impai­red or even prevented.