Did some testing this past week, since there's so much speculation about the Stetsom amps daily abilities. Setup was:
200 amps alternator
2 Kinetik 2400's in the back (unsure of front battery)
Single DD 9518, tuned to 33hz
Before we get into the meat and potatoes, I felt this was a valid test because of the claims of the Stetsom putting out 3500 watts, the pair of Sundowns should have been around 1600 watts each, making it a close test.
All testing was done at rated ohmload on both amps, which is 2 ohms. The single 2K6 was at 2 ohms, the pair of Sundowns strapped at 2 ohms.
1st test was on the meter, the 2K6 was a tad louder, 0.12db to be exact at 42hz. Kind of what I expected, giving the ratings.
2nd test was daily listening. At first, the Stetsom seemed to perform well, until about 10 minutes into the listening test, it shut down. Went into protect. Let it cool off, fired it up again, same thing, around the 10 minute mark, it shut down.
Put the pair of SAZ-1500's back in, and listened for over an hour straight at the same volume levels.
So, I confirmed what I and others think about the 2K6/7KD, it's a great burp amp, but it's not suited for daily use, even at the rated 2 ohms. What I found interesting is that the current draw on the single 2K6 was higher than the Sundowns strapped, although it's fused at 200 amps, and the manual said 240 amp max draw. We measured higher than that on the burp tests. Oh, and don't try to put another brand of fuse in the Stetsom, put a 200 amp Stinger fuse in it, and it'll pop it.