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I went from Class D to Luxman A/AB - And most of what you think is wrong

Hi everyone,

As most of you know, I’m a fan of Class D. I have lived with ICEPower 250AS based amps for a couple of years. Before that I lived with a pair of Parasound A21s (for HT) and now I’m listening to a Luxman 507ux.


I have some thoughts after long term listening:
  • The tropes of Class D having particularly bad, noticeable Class D qualities are all wrong and have been for years.
  • No one has ever heard my Class D amps and gone: "Oh, wow, Class D, that’s why I hate it."
  • The Luxman is a better amp than my ICEPower modules, which are already pretty old.

I found the Class D a touch warm, powerful, noise free. Blindfolded I cannot tell them apart from the Parasound A21s which are completely linear, and run a touch warm due to high Class A operation, and VERY similar in power output.


The Luxman 507 beats them both, but no amp stands out as nasty sounding or lacking in the ability to be musical and involving.


What the Luxman 507 does better is in the midrange and ends of the spectrum. It is less dark, sweeter in the midrange, and sounds more powerful, almost "louder" in the sense of having more treble and bass. It IS a better amplifier than I had before. Imaging is about the same.


There was one significant operational difference, which others have confirmed. I don't know why this is true, but the Class D amps needed 2-4 days to warm up. The Luxman needs no time at all. I have no rational, engineering explanation for this. After leaving the ICEPower amps off for a weekend, they sounded pretty low fi. Took 2 days to come back. I can come home after work and turn the Luxman on and it sounds great from the first moment.


Please keep this in mind when evaluating.


Best,

E
erik_squires
erik_squires OP
16,901 posts
 
Erik instead of burying your head in the sand about the problems that Class-D has had since it’s inception, with switching frequencies+filters,

The man who simply refuses to listen to any view but his own would like to claim I buried my head in the sand.

No, George, my original post was all about a progressive view point towards Class D amplifiers. Your view is from the 1980s and has moved nowhere. As we’ve discussed with embarrassing regularity, your claims of the superiority of Class A/B amplifiers over Class D based on measurements alone has no justification in terms of audibility of any amplifier made in the 21st century.

My claims are from personal experience, along with those of other audiophiles who have visited. You can complain about the sound quality of specific amps, but the trope is decrepit.  I am however astonished at your powers of necromancy in bringing them up over and over again despite so many positive reviews from Audiogoners to the contrary.
georgehifi's avatar
georgehifi
10,312 posts
 

Look at what you posted, you started the personal slurs again Iric with your post, not me.
" I was really worried that Goerge would have gotten too old and tired not to raise the same tired and irrelevant tropes"
So just suck it up sunshine without the slurs that start these confrontations. And come back with some thing technical or useful against what I’ve posted, not just a derogatory slur, your getting good at those, if you've got nothing then don't say anything. 
pokey77
1,269 posts
 
@georgehifi 

With all due respect, what's good for the goose is good for the gander.
fasteddie199
32 posts
 
Hello all,

I only have one room for A/V enjoyment.  My amplification must serve 7.1 surround and 2.1 stereo.  I think the sound emanating from my HK is no compromise in either circumstance.  I just hope HK is not going flush it all down the toilet as they appear to be migrating to "lifestyle" (aka Sonos, Bose, etc.) mediocrity.

https://www.digitaltrends.com/gadget-reviews/harman-kardon-avr-3700-review/

" Its clean power delivery and dynamic capabilities were quite impressive for a class D receiver, and its rich, powerful, and refined sound reminded us of what a good, audiophile-quality amplifier sounds like."  

I like what I have and will probably remain so until I get another bug up my butt telling me I need to upgrade.
toetapaudio
474 posts
 
@georgehifi what class D amps have you heard? 
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