What amp for 2 kappa perfect builds?

[Inertia]

I have 2 of the old Infinity kappa perfect VQ subs. Right now I only have 1 of the simple kappa enclosures but am making another... I want to run either this crown amp to them: Crown XLS 1500 Power Amp, 1500 Watts at zZounds

or this behringer amp to them: Behringer EP2000 Europower Power Amp at zZounds

If money is not an object which amp would you use?

[jinjuku]

I would pick up the Crown if those are the only two choices. For one you most likely won't need to fan mod it since it is temperature controlled.

And the situations that require the fan coming on are when the subs are really playing loud so you won't hear the fan anyways.

BUT why not just get the Behringer iNuke 3000DSP? It will have all the equalization built into the DSP portion and by the user guide is 620 watts RMS / Channel at 4 ohms.

[Inertia]

Ok Im not up on the equalization part of power amps. What exactly will the iNuke be able to do better than the crown and is the equalization easy to deal with? If I understood what it can do and how I would probably buy it instead. Thanks for any help guys!

[Inertia]

One other question... why does the iNuke 3000DSP only weigh like 8 pounds and the EP2000 weighs like 40 or so?

[agarwalro]

The iNuke is based on Class D design, which requires small compact circuit layout instead of the traditional bulky, heavy and costly parts like a huge toroidal transformer, big heat sinks, etc.

The DSP section offers delay, crossover (3 filter types, up to 48dB/octave), EQ (8 parametric, 2 dynamic), and dynamics processing. The security settings are lockable to prevent unwanted changes". It is controlled via a PC interface,

[jinjuku]

Ok Im not up on the equalization part of power amps. What exactly will the iNuke be able to do better than the crown and is the equalization easy to deal with? If I understood what it can do and how I would probably buy it instead. Thanks for any help guys!

The EQ helps you smooth out the response of the sub.

[Inertia]

How do you go about using the eq though? Do i need an spl meter? And what type of interconnects would I need for either the crown or the iNuke? Is the iNuke really that much more powerful than the crown as well? Are one of the crossovers on the iNuke a subsonic filter?

[jinjuku]

You will need some form of RTA (real time analyzer). The REW (room eq wizard. setup will run you about $200 ($100 for a Tascam US144MKII, $60 for a Radio Shack Digital SPL Meter, $40 for a calibrated Mic from Parts Express). Or there is TrueRTA and also the Dayton Omni measurement mic.

I would have went with the Omni mic if it had been available all those years ago.

You could also use the SPL meter and simply take measurements in 2 to 3 hz increments starting at 20hz-80hz and write down the dB reading of each and plot it out on graph paper. If you noticed any big dip or drop you could take measurements at that range in 1hz increments to find out where it starts and stops.

Then it is on to to programming the DSP. An AVSer made a nice intro walk through. I've been contemplating a video tutorial and youtubing it when I get a chance.

[jinjuku]

There has been some concern about the price creep in doing a properly eq'd multiple sub setup. For a one time deal the hesitation in spending $200-300 in measurement hardware is understandable.

In a nutshell what any one that wants to build and setup a high quality, cost effective sub setup can do is get an SPL meter for $60, or even try an SPL application for the iPhone or Android.

Armed with that they can do the sub crawl approach. You are going to need a friend and some time how ever to complete the sweep of the typical 20-80 or 20-100hz range.

Figure out your reasonable placement options for the subs and start crawling those areas with the sub in your typical listening position. You will want a piece of graph paper for each of your potential locations so you can construct a SPL to Frequency plot. You will need someone that can use a computer as a tone generator and start playing back tones at 2 or 3Hz intervals and record the SPL levels at locations and construct your graph.

I am personally thinking about starting a rental service of my measurement rig.

[Inertia]

I have the bass mekanik cd that does 10hz to 100hz at 1hz intervals... will that work with an spl meter?