Modern fine-groove records rotate at 33.3 r.p.m. The older standard records rotated at 78 r.p.m. The material of which the records are made plays an important part in determining reproduction quality. The cheaper records are made of synthetic thermoplastic resins containing fillers. The moulding of records is done under pressure, with the aid of heat.
Stereophonic records are recorder with the aid of two separate microphones.
The two signals are amplified and fed to two separate loudspeakers. We hope you found the information contained on these pages informative and enjoyable. This site was created just for fun. We don't sell any of these items or know who does.