I use the MC100b from Yaqin and i like him very much.
He is dual mono and has blach gate capacitors. He is power full.
Sounds better then the MC10l from Yaqin. I have changed the tubes to make a big improve in soundstaging and details. I use Elektro Harmonix tubes 4 x KT88, 4 x 6SN7 and 2 x 5751. The 2 last ones had the most influence on the sound. The amp costed $ 600,- incl. delivery to the netherlands from hong kong.