This gallery contains 18 photos.

                                          Description The F4 hybrid amp is based on Nelson Pass’s First Watt F4 unity gain buffer amp and a … Continue reading →

This gallery contains 33 photos.

I am happy to present my new, improved parallel single-ended, low power amplifier, featuring again the amazing direct heated pentode  4P1L. Overall, compared with the first built, I can say the sound is similar, just more refined and definitely is … Continue reading →