The F601A is a high performance professional microphone preamplifier. Its innovative Zero-Negative-Feedback design improves low frequency and transient reproduction dramatically. In addition, the F601A delivers detailed high frequency information without being harsh, a truly silky and smooth experience. It's fully discrete Class-A gain stage with its high performance Lundahl LL1578XL input transformer outperforms “classic” microphone preamplifiers by a wide margin. This combined with the F601A's very low noise will provide exceptional sonic results.