Originally Posted by noah katz
Tim, thanks for sharing your experience.
I got a 3000 about a month ago to replace a CS4080HZ (1250 W/ch @8 ohms, 2000 W/ch @ 4 ohms), because the latter doesn't have enough input sensitivity to be driven to full output by a MniDSP, and because it would sometimes blow the breaker on turn-on.
I haven't noticed any difference in SQ, which I'm very happy about considering it's a 7 lb amp vs. the CS4080's 50+ lb.
Using a signal generator directly driving the 3000, I measured 63.3 V output at 10 Hz when the DDT light gets activated, driving my dual MaelX18 sealed sub.
According to WinISD it's about 2.6 ohms for the paralleled pair at 10 Hz, which calculates to 1540 W.
Driving both of my subs, the second being a DTS-10 (nominally 4 ohms), gave about the same reading, as did higher freq.
I say "about" because accuracy suffered in my haste to make the measurement quickly so as not to roast the VC's.
For those surprised that output held up at such low freq, JD Bennett told me that a component change late in the game resulted in less of a low freq rolloff than originally reported.
Then ran the signal through my Denon 4311 and MiniDSP.
With the volume control at max, I got 53 V out of the 3000 at 10 Hz, about 1.5 dB shy of full output.
The MDSP input level meters were just below the top of the scale, the outputs several dB below.
If I need to I could boost the overall level with a very low Q shelf filter, but so far I haven't seemed to need it.