SAA7220P NOS 4 Parallel TDA1387 for DAC Upgrade Board for Audio

SAA7220P NOS 4 Parallel TDA1387 for DAC Upgrade Board for Audio Description

High-quality for DAC upgrade board for audio systems The SAA7220P NOS is a premium parallel for DAC upgrade board designed for enhancing audio performance. It supports advanced signal processing and delivers improved sound clarity and precision.
Compatible with TDA1387 systems Engineered specifically for use with TDA1387 configurations, this board ensures seamless integration and optimal functionality in audio equipment requiring high-fidelity conversion.
New old stock quality This NOS component is sourced from original manufacturing batches, guaranteeing authenticity and reliability for vintage or audio applications.

choose 4 parallel connection instead of 8 parallel connection?
Because the TDA1541 is "inhaling" about 2MA of current per channel, there is 0.002*R (IV resistor) V voltage at the output.
In accordance with the 1.8K resistor: 1.8K * 0.002 = 3.6V at the coupling capacitor side
The TDA1387 is "exhaled" 0.54MA of current per channel, 4 and is 2.16MA of current, the out side has -0.00216*R(I/V resistor) V voltage.
According to the calculation of 1.8K resistor: the coupling capacitor has -1.8K*0.00216=-3.888V
Note for substitution:
Because the TDA1541 output is positive voltage, so the circuit the positive side of the coupling capacitor connected to the 1541 pin.
The TDA1387 is a negative output, so after the replacement, the coupling capacitor the board should be reversed, or use a non-polarized capacitor.
Color: As Shown
Material: PC+Metal

Package Contents:
1* Module