Istanbul Agop Cymbals is a cymbal producer based in Turkey. Its products are well respected for their unique sound, which is formed by the method and the alloy used, the formula of which is known only to the owners of the firm, Armenians Arman and Sarkis Tomurcuk. It is one of two companies that formed after the split of Istanbul Cymbals.

A cymbal is a common percussion instrument. Often used in pairs, cymbals consist of thin, normally round plates of various alloys. The majority of cymbals are of indefinite pitch, although small disc-shaped cymbals based on ancient designs sound a definite note. Cymbals are used in many ensembles ranging from the orchestra, percussion ensembles, jazz bands, heavy metal bands, and marching groups. Drum kits usually incorporate at least a crash, ride, or crash/ride, and a pair of hi-hat cymbals. A player of cymbals is known as a cymbalist.