Stereophile - Sabrina 5

EPDR

This keeps getting mentioned so I thought I could clarify it a little. 

EPDR is often discussed as a way to improve our understanding of the interaction between an amplifier’s output impedance and the speaker load.   The idea is that EPDR tells us something about the current and voltage at the speaker terminals that would result from this speaker being attached to any amplifier. 

Unfortunately this is NOT the case.  EPDR is about heat at a linear amplifier’s output transistors.  "Peak Dissipation" here means at the output transistors, or heat sinks.   In particular, if you care about EPDR, then use a Class D amp, cause EPDR does not apply at all.  It also has nothing to do with an amplifier's output impedance or current limits, at least how you think they would, and even Stereophile's original articles don't make this claim.  They just sort of let you feel they do. 

I wrote about this in a great deal of depth here. 

Obviously, nothing good about overheating your amplifier, but I would be much more concerned, if not curious, as to how Wilson can get an 8 or 4 Ohm woofer to go all the way down to 2 Ohms. That’s quite an impressive feature.  

That was a great review.as in quantum physics there are some elements formulas,theories still under debate. This is why I buy amplifiers with alot of headroom > 1kw and drop down to 1 ohm stability with high dampening factor.big transformers and lots of capicitors.  I love the furman 20 I because of the lift and surge protection and large capicitors for discharge during transients in the amp  is also believe in large gauge speaker wire to reduce resistance 7 awg or larger to minimize resistance. What does this have to do with wilson? I knew him and raced with him on Miller motor sports track.he was kind,generous,concerned and listened and answered my questions. I miss him alot and wished I had gleaned more  knowledge from him. Even though my wilson maxx can be driven with a low wattage amp it is when you step on the gas with a high kw amp they come alive.long live audiophile and engineers as I enjoy the fruits of thier labors.

Huh? Impressive?..0.95 ohm epdr ......wonder what godawful crap it was with the Alexx V. All that to eek some extra useless bass out of it... 

Here's where the common sense goes missing for the audiophile...Perhaps he thinks he's floating around in Valhalla without a room to deal with....

You walk around in front of a Alexx V and the bass was in some other spot in the room ....way outside of your audiophile triangle sweet spot for imaging wonders or whatever. Hence, still need some subwoofers for the room anyways, no matter what bass you eeked out of that Wilson or not...same goes for anything claiming to be full range

(that extra eeked out for bass, lousy load for naught)

Is a Gryphon monster amp a fidelity king, you thought? Hell no, it isn't. It all comes with a fidelity compromise dude...Those 2 hernias from lifting it for naught again...Any monster amp still sounds worse with a lousy load like that (whether it survives the load or not).

Obviously, nothing good about overheating your amplifier, but I would be much more concerned, if not curious, as to how Wilson can get an 8 or 4 Ohm woofer to go all the way down to 2 Ohms. That’s quite an impressive feature.  

Having owned a Watt/Puppy, earlier series, for a short while, and heard many models of theirs, I can honestly say they are a great speaker company. deep-333, you got to chill out. What is eating at you? I was always looking for something to better my Klipsch Lascala "experience". Dvorak, Symphony # 9, I can only say, a great speaker should play everything well, including this. There is a special spl level I like to play this at, so I can only use horns. Anyone reading this, who owns and loves horns as I do(I have owned Lascalas since their introduction, 1st pair in Brooklyn, NY), will understand what I am talking about. Tried everything.......I totally understand why erik posted this. My best, MrD.