Will this preamp REALLY improve your class D amp?
Fosi Audio P3 Tube Preamp Headphone Amplifier Home Audio Preamplifier Mini Vacuum Pre Amp Receiver with Bluetooth aptX LL HD Bass Treble Tone Controls for HiFi Stereo Active Speakers with RCA
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Fosi Audio P3 Tube Preamp with Bluetooth 5.1 Bass & Treble
