The Whitestone Audio
The Whitestone Audio P331 Tube Loading Amplifier was developed to bring professional tracking, mix and mastering engineers versatile, elegant, precise and repeatable audio circuit variation. There’s nothing like running a signal through a well-designed piece of analog gear, at “unity” gain without any “processing” applied at all. Simply exploiting the sound of some of these analog input and output gain circuits with processing bypassed is often-times just the thing to help bring subtle life or enhanced depth to recorded audio. That’s what the fully balanced P331 is all about; giving you control of how an audio signal passes from input to output and how it can be enhanced throughout its journey.
All Information https://www.whitestoneaudio.com/p331/