True Systems P-SOLO

The P-SOLO is a single-channel discrete Class A microphone preamplifier. It is designed to provide a warm, natural presentation while keeping coloration relatively restrained across the frequency range.

The product is described as using six germanium transistors for signal amplification. That component choice is part of the reason the P-SOLO is associated with a smooth, warm character rather than a sterile utility preamp sound.

Its primary role is microphone preamplification, so it sits between a microphone and an audio interface, recorder, or mixer. As a single-channel unit, it is suited to recording one important source such as a vocal, guitar microphone, or voiceover mic.

It provides a dedicated front end with more control over gain and analog signal character than relying only on an interface's built-in preamp. The P-SOLO manual describes a high-voltage discrete architecture intended to deliver detailed, transparent sound.