☆ Welcome☆ to ☆ my ☆ shop ☆ Description: The current batch of finished board op amps uses JRC, this sound is more balanced,Of course, no op amp is suitable for all systems, and you can replace it yourself.SSM2141 balanced signal to unbalanced signal, the board is stereo two-channel, the supply voltage DC ± 9-15V (recommended ± 12V) Input balanced signal and output unbalanced signal. It is suitable for the system where the front stage is balanced signal output and the back stage has no balanced signal input. Especially for those who use professional pre-writers, most of the professional pre-classes are balanced output. This board can turn your balanced signal source into the unbalanced signal required by ordinary power amplifiers. It is worth boasting that the internal resistance of SSM2141 is laser trimmed, and its accuracy is as high as 0.0001%. In terms of distortion and noise and parasitic interference, its performance undoubtedly reaches "professional level". Compared with the previous conversion circuit made with 5532 op amp, the performance is greatly improved. By laser-tuning the on-chip resistors, excellent common-mode noise rejection and offset error performance can be achieved, ensuring the device has high gain accuracy. The SSM2141 uses a cross-coupled electronically balanced topology that can simulate the performance of a fully balanced transformer solution for line drive. Compared with the transformer, the SSM2141 is much smaller than the transformer, has lower distortion, occupies much less board space, and can achieve common mode rejection performance comparable to the former with fewer components. SSM2141 is used in series with the differential transmitter SSM2142 to build a complete and reliable solution for audio signal driving and receiving applications on long cables. Shipping list:1pcs bare PCB or Assembled Shipping> We ship to worldwide.> Orders processed within 24-48 hours after payment verification.> We only ship to confirmed Paypal addresses. Your Paypal address MUST MATCH your Shipping address.CountryShipping WayShipping TimeTrackable United StatesUSPS(ePacket)7-18Yes RussiaChina Post15-35Yes Other CountryEconomic Air Mail15-40NoIf you need register mail or other express shipping, Pls contact us. Warranty & Guarantee> Good good quality. Buy with confidence!> Returned & Guarantee. If not satisfied with the item, you can choose to return it for a replacement or money back. We afford all cost if it's our fault. Exchange or refund.Please contact me before you return it. full refund after we receive our original item.> We maintain high standards of excellence and strive for 100% customer satisfaction! Positive feedback is very important to us. We request that you contact us BEFORE you give us neutral or negative feedback, so that we can satisfactorily address your concerns Contact us> Our goal is customer satisfaction!> Our Working-time From 8:30 AM to 21:30 PM(GMT+08) .> We strive to provide you with the best service, we will reply your question within 24 hours.( IF have any problem, we will appreciate that you contact us first BEFORE open a dispute or request, we will try our best to solve the problem with you. ) Payment> We accept Paypal only, It is fast, easy and safe.> Payment must be completed within 7 days.> PLEASE NOTE: S&H DOES NOT INCLUDE DUTIES, LOCATL TAXES OR ANY OTHER IMPORTATION FEES. About me Please contact me first before you leave a negative review if my item are damaged or defective when you got it, I'll do resend or refund (as your choice) once I confirm with that, which is a most kind of favourable way to both of us work things out together.Your support and comprehension are highly appreciated for me. Thanks for everything, and at last, I full of expectation to do business with you!!!!