Hey everyone, just got my first Sunn head and took it to a respected local tech to get a full once over as it was all original, with the 2 prong plug. when plugging into the 4 ohm ext jack I get no sound. It's my understanding that with one cab the amp has a switch between 8 and 4 ohms between the main and ext jacks on the back. wanted to confirm this is true and not my own error before taking it back and making a stink... anything inside to look for or advice would be much appreciated. sunn forever
ps... while ive got you- how much of a difference/what do you all prefer for guitar? k140 or the sunn transducers in a 200s cab? have the opportunity to buy either but not sure if its worth spending an extra $300 for the jbls.