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Stereo buffer & isolation V2.1
Stereo buffer | preamp with isolated output aimed at 19 Inch rack equipment. Input volume can be boosted up-to 10dB.
This design is intended to be used in a modular configuration, where it functions as the input / output stage for an audio effect or preamp.
This version includes a relay and simple switch connector for toggling the isolation on|off.
Transformer isolation:
- Zin ~1M Ohm
- Zout ~600 Ohm
- THD+N @ 1kHz ~0.05% (Increased THD below ~200Hz).
- SNR ~100dB
- Crosstalk ~70dB
- For a flat (±1dB) frequency response: requires an additional load on the output of 680Ohm in series with 10nF.
Without transformer isolation:
- Zout ~0.3 Ohm
- THD+N improves to ~0.0015%
- Frequency response improves to ±0.04dB
Stereo buffer & isolation V2.1
Project images are for reference only. Actual production is based on the manufacturing files on the project page.
Please review the designer's notes (e.g., PCB thickness) and select the appropriate options.
PCBWay is not responsible
for issues caused by unsuitable parameter selections.
For more important ordering information, please refer to
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