OPA627 Operational Amplifier on a gold plated adapter board - Function and suitability Uses field effect transistor input mode and is suitable for front and rear amplifier stages, output buffers, voltage amplifiers, and headphone amplifiers. - Compatibility and upgrade options The usual dual op amps can be used in audio applications. Compatible models include LM833, LM4562, 4558, 5532, 4556, LF353, OP275, AD712, AD827, AD746, AD797, OPA2604, OPA627 Dual, OPA637 Dual, AD797 Dual, AD8, AD843. Can replace or upgradeDual, AD847 Double, and similar devices. - Appearance and hardware Gold plated pins on the adapter board. OPA627AU SMD single operational amplifier mounted on an exquisite adapter board with fully gold plated pins. - Sound and performance Delivers a warm sound with a spacious sound field. The output is characterized by delicate, soft and graceful tonality with clearly defined highs and strong presence. - Practical use scenarios 1) Upgrade hi fi front or rear amplifier stages, including headphone amps, for improved warmth and clarity. 2) Replace or upgrade op-amp paths in audio equipment to enhance signal integrity and overall sound quality. 3) DIY audio projects requiring an OPA627AU SMD single op-amp on a gold plated adapter board for easy installation.