High current amp search

I have a mint pair of Electron Kinetics Eagle 400s, which were rebuilt by a company that Nelson Pass at Pass Labs recommended. While they're no Boulder 2060, they punch way above their weight and sound amazing. 

harry (at) harrymax (dot) com

Hello lukaszwk!  Don't miss the Starke Sound Fiesta 4, the best bargain on power amps. The have been offering special pricing around Thanksgiving for the last few years. I drive Maggies and inkwitz with them and anythintg else that enters my home. Enjoy the Music!

My philosophy is that since it is the speakers that shape a system’s end sound, they come first.

Selecting speakers based on impedance is like picking a movie based on which snacks the theater’s concession carries. Go that route and you may see a great movie, if you’re lucky.

You may find that the speakers whose sound pleases you most have a nasty impedance curve. Don’t go oh snap and look for different speakers; just limit your  amp auditions to suitably powerful candidates, and add a generous margin for headroom.

@atmasphere you are right about power vs current, of course. Ohm’s law tells us that I=V/R, (current equals voltage divided by resistance); therefore if a) voltage is constant, and b) impedance (resistance for all intents and purposes) drops by half, then current has to double, and so on.

So, if I’m not mistaken, if you’re pushing, say, 50V into an 8 ohm load, that’s 6.25A of current and 312.5W of power. That would amount to about 100 dB SPL from a 85 dB (in)efficient speaker.

50V into 4 ohms: 12.50A and 625W

50V into 2 ohms: 25A and 1250W

50V into 1 ohm: 50A and 2500W

Note that loudness is the same in all four examples above.

The rise is limited by how much current the power supplies are able to deliver.

There are high-current amps out there. Here is a quote from the Stereophile review of the Krell FPB-600:

Driven on a toneburst equivalent to peak program duty at 8 ohms, it reached to touch the 1kW line, while at 4 ohms it attained 1.85kW, and for 2 ohms 3.53kW. And for 1 ohm—wait for it—an amazing 6kW! These are single-channel results, but, measured as short-term ratings, they should be available from both channels simultaneously.

The complete measurements are here. The numbers are so insane it’s worth the read.

https://www.stereophile.com/content/krell-full-power-balanced-600-power-amplifier-measurements

Benchmark AHB2.  Stable down to 2 ohms at 259 WPC.  Amazingly clean neutral sound.  New for $3499.  

I have the krell fpb 600 and 700 cx and they are great

They do need to be gone through every 7 to 10 years and that's the only drawback. Happy hunting. The hegel h 30 is up there as well but so is the price