Audio op amps, or operational amplifiers, are specialized electronic components designed for high-fidelity audio applications. They are not a single brand but a category of products offered by various manufacturers worldwide. Prominent companies producing audio op amps include Texas Instruments (USA), STMicroelectronics (Switzerland), Analog Devices (USA), and ON Semiconductor (USA). These components serve industries such as professional audio equipment, consumer electronics, and automotive audio systems. Key products include low-noise op amps, high-speed op amps, and rail-to-rail op amps, which are essential for signal conditioning, amplification, and filtering in audio circuits. Brands like Burr-Brown (acquired by Texas Instruments) and NE5532 (a classic audio op amp model) are well-known in this niche.