1PCS OPA2604 Classic Dual Operational Amplifier Optimized Upgraded Version

OPA2604 classic dual op amp, special tuned version, old product, completely different from the 2604 sound you are familiar withThe price is 1PCSThis series of operational amplifiers are specially tuned and optimized based on their version characteristics, and are not randomly soldered or combined with capacitors. From soldering to material selection and ratio, everything is done to maximize the power of the operational amplifiers.Customization option: default use of mysterious fever soldering to increase air sensation Mid frequency vocals: textbook level warm and natural, never getting tired of listening for a long timeThis is the core soul of this plan, perfectly preserving the iconic rich vocals of my carefully selected OPA2604 version. The singer's breath circulation, chest resonance, and lip and tooth details are gently and completely restored, without deliberate ear coloring or remote emptiness. The vocal structure is solid and full, and the emotional expression is delicate and long-lasting. Enjoy the charm of analog flavor that modern operational amplifiers cannot match.High frequency performance: smooth and transparent, with full overtones and air sensationThrough the use of additional components, the common problem of OPA2604's native high-frequency dimming has been precisely cured, while completely retaining the auditory endurance of the warm sound operational amplifier. The high frequency brought by Panasonic film capacitors is a natural extension of brightness and overtones. The violin strings tremble, the long aftertaste of the triangle iron, and the overtone ending of the guzheng are all fully presented, creating a sense of space and air around the instrument. The sound is lively and dynamic, without any burrs, spikes, or compressions. It not only solves the problem of high-frequency stuffiness, but also avoids the sharp and situation, perfectly balancing analytical power and listening endurance.Low frequency texture: firm and solid, with both atmosphere and analytical powerThe low ESR and high transient response of ruby polymer film capacitors allow for flexible low-frequency adjustment and clear and distinguishable form. The drum beats are steady and powerful, with precise diving and no unnecessary residual sounds or dragging. The bass lines of pop music and the double bass rhythm of jazz music can present a clear sense of hierarchy. It retains sufficient atmosphere without stealing the limelight of mid frequency and high frequency. The full frequency connection is natural and smooth, maintaining stable linearity under large dynamics without any soft feet or distortion.Background purity: Deep sea level noise free, complete presentation of weak detailsThe full thin film filtering architecture has zero piezoelectric distortion and zero nonlinear distortion throughout the entire process, and the bottom noise is suppressed to the theoretical limit of OPA2604.Sound field and structure: neat and natural, with full musicalityThe horizontal and vertical proportions of the sound field are balanced, without any abnormal stretching or compression, fully restoring the original spatial layout of the recording. The instrument structure is full and three-dimensional, with precise positioning without looseness. Unlike the sharp structure of pure monitoring schemes, the structure of this scheme is more solid and coherent, and the overall listening experience is more musical. Whether it's the close-up spatial feel of small-scale chamber music or the stage atmosphere of popular music, they can be perfectly presented, bringing an immersive listening experience.