Mono blocks-High current/low impedance...options?

Hey Vince.......

You forgot to tell us what the frequency response looks like @ 2 ohms. The current output you give is the peak value, which means only for a very short transient. All it really says is that with an 80V rail, and a 2 ohm load, it should be able to operate for a short period of time without melting.

(Of course, that assumes that the supply voltage doesn't drop under such conditions.......etc.)

But if you want an amp that puts out 1 kW into only 4 ohms, then have I got a deal for you.............

I know....behave and stop making trouble. [joke]

I know....you're itching to get your hands on some of our stuff. Maybe when more of our loaners come back, we'll work something out.

Irony is........you would think that an amp that can do 1 kW into 4 ohms, and can work into loads as low as 2 ohms, would be great on a really difficult, power hungry load. That is what we thought.

Problem with all ICEpower modules is the frequency response tends to peak as the load impedance goes lower. While the peak is above the audio range, it still tends to tilt the HF response.

With an 8 load, I can easily understand why you are so happy with Henry's amps. The 250 doesn't peak too much, and while the 500 does a bit more, it is manageable. At 8 ohms, that is.

You only run into severe peaking problems with loads below 4 ohms. For those loads, the peaking is shifted into the audio band. This has the additional detrimental effect of causing the very top (18-20 kHz) to drop off rather quickly. Again, not too bad in the 250, so-so in the 500, but way too much with the 1000ASP. So, you end up with a peak around 16 kHz, and a sharp drop at 20 kHz with the big module. (If you look closely at their specs, they only spec the stand-alone 1000W module for 6 kHz or so.)

OK........crux of all this:

I know that there are companies selling amps using the 1000ASP modules. Some of them may even be friends of mine.

BUT:

I do not recommend them to be used with very low impedance loads. Seems like a waste, as why would anyone with anything other than an inefficent, low impedance load need an amp that puts out 1 kW?

Pssst........if you need a kilowatt for a (sub) woofer application, call me. Prototype units available at a great price.

The "point" did not show up on my screen. I was sure you had a fairly low load.

And yes, it is indicative of ALL of them.

Mine, Henry's, Rowland's, PS Audio......you name it. You can't change the laws of physics.

Face it: you can't measure it and I can. If you like it, then fine. I really don't care. I'm just telling you what the truth is. You choice to believe it or go about impervious.

You realise there is the distinct possibility that whatever you had before had even a harder time driving that load, and had just as many, if not more, problems. But since you have absolutely no way of verifying anything, we will all have to just guess.

I am not crashing anyone's party. Neither you or Henry run this forum.

If you can not accept the laws of physics, then just butt out. A lot of us are tired of your constant cheerleading. Maybe we ought to lodge a protest against you.

I don't know what your problem is. We aren't even talking about the same entity. Your buddy Henry does not build amps using the ASP modules, and that is what I am talking about. Unless you are willing to compare apples to apples, I suggest that perhaps you should not try to confuse the readers.

The ASP modules are more suited to low Z application, as they have current limiting and short circuit protection built in. In theory, they would be ideal. But they don't work well for very low Z loads in a full-range application. If that subtle point has eluded you, well, I can not take responsibility for that.

Personal jab??? I thought that you had a sense of humour. I suppose I guessed wrong.

Should I ask everyone to genuflect now??? [JOKE]