Class A amps
Easy to wire up Just get 2 of these https://icepower.dk/buy/as-series/1200as1/ $600pair And one of these https://icepower.dk/buy/power-supplies/1500s/ $400 Throw them in a nice box https://www.ebay.com.au/itm/162028925013?hash=item25b9ad3055:g:K~kAAOSw5VZXA2Ad $100 And for $1100 you’ll have a stereo version that’s just as good. You'll save $5k!!!!!!!! Cheers George |
I know you consider Pass Labs products as well designedYes they are, and that’s where it ends for me, much prefer the sound of Nelson’s Threshold amps he designed using bi-polar outputs. I don’t like the sound of Mosfet output amps, and that they don’t drive very low impedances as like the great bi-polars can, like Class-D also has diminishing performance well below 4ohms as well. I submit the Legacy i.V4 Ultra for comparison to the Gryphon Antillion. They’re just IcePower 1200 modules https://icepower.dk/buy/as-series/1200as1/ maybe with a couple of mods. Your a very game man putting up an IcePower 4ch Class-D ( 610 watts per channel into 8 ohms, 1,000 watts into 4 ohms peak current 38A😴) They never seem to show 2ohm specs for Class-D as it usually ***** itself A Gryphon Antillion https://gryphon-audio.dk/wp-content/uploads/2018/10/ANTILEON_1.jpg even though lower in 8ohm wattage nails the Icepower, (150 watts per channel into 8 ohms, 300w into 4ohm, 600w into 2ohm, and 1200 watts per channel into 1 ohm, 5000w!!!! peak per channel into 1/2ohm ohm peak current over 100amps)😵 a very game man indeed. "A "great designed" class-A solid state cannot be bettered." |
Because they are a classic for a heavy load on the amp even though efficient, and have been documented and measured in many article’s with graphs just for you. And if your driving them with a Pass XA60.5 sure they’ll work, but I can guarantee you, that you have not heard them at their best. Because the owner of the Alexia’s had the XA160 (mosfet) and it sounded good but they were quickly replaced by the Gryphon Antillion (bi-polar) once he heard the difference. Don’t think there’s a chance that would happen, care to name the Class-D amp you think would better the Gryphon Antillion? Cheers George |
Yes, but not as pure Class-A as the XA series, but they the XS (a/b amp) have large amount class-B after leaving Class-A with more crossover distortion, where the XA don’t As he says "crossover distortion it’s "alleviated" in A/B with some bias but NOT ELIMINATED!!, that only happens in Class-A amps" If you were using 4-8ohm speakers that were efficient, the the XA’s would be the choice. But if you had say the Wilson Alexia’s that are 1ohm EPDR in the bass, then the XS would be the better choice, for better current into that 1ohm epdr bass load, and class-B in the bass is fine We listened to the Gryphon Antillion Evo, a 150w amp but it can give 5000w at 1/2ohm, and on the Alexia’s and it can do the 1 ohm no problem It’s able to be switched from 20w Class-A bias to 40w or 100w on the fly, and all 8 of us could believe just how much better it was at 100w class-A bias. But the room did get very hot after 1 hour of listening. https://gryphon-audio.dk/shop/power-amplifiers/antileon-evo-stereo/ Cheers George |
This statement is false.No it’s the opposite Take it up with Nelson Pass. The Messiah of solid state class-A amplification (not you) And why his top of the line amps are low power Class-A!! and always have been. As he says, "crossover distortion it’s "alleviated" in A/B with some bias but NOT ELIMINATED!!, that only happens in Class-A amps" Nelson Pass on Class-A and crossover distortion: In class AB, this effect is "alleviated" by a small bias current, and then is eliminated in class A where the bias current is high. |
There are two types of solid state class-A Complimentary push/pull solid state amps that can be class-a/b or class-a if biased to the max so neither of the push pull transistor "ever" switch off and give crossover distortion. If they did you’d have crossover distortion Or Class-A that uses a constant current source and the bottom instead of complimentary push pull arrangement, and never gives cross over distortion When a class-a/b amp leaves it’s biased level of class-a and enters class-B then there is cross over distortion. Only an amp that is biased hard all the way in class-a avoids this. This "one" of the very best amps push pull solid state that was hard biased into pure class-a, it was the massive and maxed out doing only 25watt @ 8ohm, the Classic Mark Levinson ML2 monoblocks, but they could do almost 200w into 1ohm they were so good at giving current https://img.usaudiomart.com/uploads/large/2229206-5c605986-mark-levinson-ml2.jpg Nelson Pass on Class-A and crossover distortion: In class AB, this effect is "alleviated" by a small bias current, and then is eliminated in class A where the bias current is high. As he says crossover distortion it's alleviated in A/B with some bias but not eliminated, that only happens in Class-A amps Cheers George |
One simple thing, zero cross over distortion, changing from class-a to class-b . A great designed class-A solid state cannot be bettered If you patient read this https://www.firstwatt.com/pdf/art_a40.pdf Cheers George |
