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 Post subject: Class D amps
PostPosted: Sat May 19, 2018 3:59 am 
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Joined: Tue Jul 05, 2005 3:09 pm
Posts: 1512
Location: Sherbrooke, QC, CA
Just read a comment that Class D amps are not digital despite what the name tends to make people believe.

Can anyone with actual knowledge please explain to me what in hell is a class D amp?

What were the modules that are no longer made?

As I understand audiophiles (I mean real ones) do not like class D amps.

I welcome all comments from all who will take the time and effort to answer my query be it on the technical level or on the personal experience level in their own system.

From the beautiful Eastern Townships, have a nice music-filled weekend.


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 Post subject: Re: Class D amps
PostPosted: Sat May 19, 2018 4:07 am 
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Joined: Sun Dec 28, 2008 7:49 am
Posts: 1903
Location: Fairport Beach (in Pickering), ON, CA
Amplifier classes:

https://www.audioholics.com/audio-ampli ... er-classes

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Collecting vintage tube Pilot (Pilotone) HiFi gear.


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 Post subject: Re: Class D amps
PostPosted: Sat May 19, 2018 4:14 am 
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Joined: Sat May 27, 2006 8:52 am
Posts: 306
Location: Toronto, ON, CA
Got this from a search tool called Google off this new thing called The Internet.
https://en.m.wikipedia.org/wiki/Class-D_amplifier

See link at bottom of article for equivalent on Class A, A/B.

I’ve tried 4 or 5 Class D amps; just did not have enough body to the music for me. Smooth, but thin.
Primare was the best I tried, Nice implementation. Very fast. Natural.

Class G is interesting, Tried one of those, and liked it a lot (Creek Evolution 100A) but went back to the dark side (tubes) and staying.


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 Post subject: Re: Class D amps
PostPosted: Sat May 19, 2018 4:26 am 
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Joined: Tue Jul 05, 2005 3:09 pm
Posts: 1512
Location: Sherbrooke, QC, CA
Digital Don wrote:
Got this from a search tool called Google off this new thing called The Internet.
https://en.m.wikipedia.org/wiki/Class-D_amplifier

See link at bottom of article for equivalent on Class A, A/B.

I’ve tried 4 or 5 Class D amps; just did not have enough body to the music for me. Smooth, but thin.
Primare was the best I tried, Nice implementation. Very fast. Natural.

Class G is interesting, Tried one of those, and liked it a lot (Creek Evolution 100A) but went back to the dark side (tubes) and staying.



Google!

So no one needs this site I guess...


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 Post subject: Re: Class D amps
PostPosted: Sat May 19, 2018 4:29 am 
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Joined: Sat May 27, 2006 8:52 am
Posts: 306
Location: Toronto, ON, CA
CAM is more fun.


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 Post subject: Re: Class D amps
PostPosted: Sat May 19, 2018 4:55 am 
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Joined: Wed Oct 10, 2012 10:07 am
Posts: 266
Location: Repentigny, QC, CA
I've tried small digital amps; for the reasonable money, you cannot beat them (at that level). Eg. SMSL, using the chip TA2020 or 2024. You can make up some interesting configurations with these efficient amps, using say two or three within a 3-way system etc. Used as 'stereo monoblocks', they can sing.

See: https://en.wikipedia.org/wiki/Class-D_amplifier Particularly the section headed 'Signal modulation'. This is to the nub of the difference.
And:
http://www.analog.com/en/analog-dialogu ... fiers.html


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 Post subject: Re: Class D amps
PostPosted: Sat May 19, 2018 5:05 am 
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Joined: Mon Nov 11, 2013 6:43 am
Posts: 36
Location: Toronto, ON, CA
Using a NAD D3020 with totem mites in a bedroom system, sounds great.


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 Post subject: Re: Class D amps
PostPosted: Sat May 19, 2018 5:22 am 
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Joined: Fri Jun 05, 2015 9:02 am
Posts: 124
Location: Toronto, ON, CA
I am a big believer in Class D. To get a true taste what it can do you need to give it a proper chance with BelCanto or Wyred4Sound, most recent production models. Refined sound with full body, amazing detail and endless power.


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 Post subject: Re: Class D amps
PostPosted: Sat May 19, 2018 5:32 am 
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Joined: Tue Jul 05, 2005 3:09 pm
Posts: 1512
Location: Sherbrooke, QC, CA
natedog wrote:
I've tried small digital amps; for the reasonable money, you cannot beat them (at that level). Eg. SMSL, using the chip TA2020 or 2024. You can make up some interesting configurations with these efficient amps, using say two or three within a 3-way system etc. Used as 'stereo monoblocks', they can sing.

See: https://en.wikipedia.org/wiki/Class-D_amplifier Particularly the section headed 'Signal modulation'. This is to the nub of the difference.
And:
http://www.analog.com/en/analog-dialogu ... fiers.html



Man they sure go against the KISS principle don't they!

I'm addicted to big bad heat sinks so I guess I will leave the ARC DS450M I was intrigued by to someone else.


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 Post subject: Re: Class D amps
PostPosted: Sat May 19, 2018 5:53 am 
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Joined: Wed Aug 08, 2012 4:17 pm
Posts: 2783
Location: Winnipeg, MB, CA
I too have tried a number of class D amps and am now on my second all digital amp. Common to them have been the small form factor, built in dacs and given I run these for 15hrs plus on the weekends the design is perfect for my needs.
I have found both offer great detail retrieval and bass management, however the all digital have offered a better balanced presentation and thus less fatiguing for me. This set up is largely digital source so that is a consideration but the all digital amps seem to smooth that out better.


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 Post subject: Re: Class D amps
PostPosted: Sat May 19, 2018 6:35 am 
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Joined: Fri Mar 06, 2015 3:01 pm
Posts: 360
Location: CAMBRIDGE, ON, CA
I love Paul's Video's and explanations!

https://www.youtube.com/watch?v=rj6h4qY ... DvBrGLCCnr

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 Post subject: Re: Class D amps
PostPosted: Sat May 19, 2018 6:48 am 
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Joined: Mon Mar 02, 2015 11:39 am
Posts: 119
Location: Oakville, ON, CA
I have a Wyred4Sound MK500 mkii...amazing power amp. So much controlled grunt and no digital hash.

I believe early implementations set the tone for this whole idea of Class - D being crap. Modern implementations seem great. Personally I've found my taste really enjoys a Tube Pre into a SS power amp best of both worlds ???



VegliaAudio wrote:
I am a big believer in Class D. To get a true taste what it can do you need to give it a proper chance with BelCanto or Wyred4Sound, most recent production models. Refined sound with full body, amazing detail and endless power.


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 Post subject: Re: Class D amps
PostPosted: Sat May 19, 2018 7:11 am 
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Joined: Sun Dec 18, 2005 4:29 pm
Posts: 388
Location: Ottawa, ON, CA
I recently got a Wyred4sound STI-500 and I bought it hoping it would be an improvement over my Hegel H80s. It is! I'm no expert but it's the best class D amp I've heard.


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 Post subject: Re: Class D amps
PostPosted: Sat May 19, 2018 7:41 am 
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Joined: Wed Mar 26, 2008 9:54 am
Posts: 187
Location: London, ON, CA
I have tried a class D amp twice in my system just for fun.

I agree with many of the previous sentiments - bass authority is impressive. I still find something is wrong with it though. It sounds clear but dead; I think my ears actually miss distortion and class D offers a total lack thereof.

I am also back to tubes. haha


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 Post subject: Re: Class D amps
PostPosted: Mon May 21, 2018 5:06 am 
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Joined: Fri Jun 28, 2013 5:25 pm
Posts: 46
Location: St-Leonard, QC, CA
It seems class-d is harder or impossible to repair.

Another thing, It doesn't pass the test of time. The currend procution model will be bested by a new one in a few year and so on. It cause a problem of resale value for the old class-d et stronger desire to upgrade.


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