First off, not to get too lengthy, this amp finally gives me the sounds i've been hearing in my head for so many years, that I could not get with my current rig. Really love it! Both EQ sections are very musical, compressor is awesome, the tube is subtle, but absolutely affects the tone. Friggin' LOUD. The faceplate on my model has no DTECH reference silk-screened on the front. it's just a blank area now.
Now the concern......
It does hiss (not hum) as others have mentioned, but no different than what I've heard in some other amps.
I was molesting it for a good two hours last night thru a 210, & 112 @ 2ohms. with no problems. I shut if off for a brief moment, and when I turned it back on, it went into protect mode. @@!##@@ I poked around with the ohm switch, mixed cabinets, etc. but nothing. It did come back on within a few minutes, and all seemed well. I then went thru the on / off series again, and more of the same. Went to bed... This morning I fired it up, and it turned on right away. turned it on, and off several times, and it came on quickly each time. I will call carvin today for some insight, but my thought is that after shutdown when hot, there is probably some residual heat that builds up with the fan being off that caused the circuit to trip. Sound normal? It seems that it would be best during a gig situation to just leave it on the whole duration.
Anyway, otherwise, this is an incredible sounding amp....