Features: Input balanced signal, output unbalanced signal. The SSM2141 features a cross-coupled electronically balanced topology that simulates the performance of a fully balanced transformer solution for line drive. The performance of the conversion circuit made by using the 5532 op amp is greatly improved. Excellent on-chip laser rejection for excellent common-mode noise rejection and offset error performance ensures high gain accuracy. Chip Description: The internal interior of the SSM2141 is laser trimmed with an accuracy of 0.0001%. In terms of distortion and noise as well as parasitic interference, its performance has undoubtedly reached the "professional level". Function introduction: input balance signal, output unbalanced signal, suitable for the front stage is balanced signal output, and the rear stage has no balanced signal input for the rear stage system, and various power amplifiers without balance input. Specifications: Material: ABS Size: Approx. 87x49 mm/3.43x1.93 in Stereo Dual Channel Input Voltage: for DC Dual 12-15V (recommended voltage: positive 15-0-negative 15) Package Includes: 1x Power Amplifier note: Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. Due to the difference between different monitors, the picture may not reflect the actual color of the item.