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Build Your Own Professional-Grade Audio Amp on the Sort-Of Cheap

spectrum.ieee.org

11–20 of 270 posts

Re: Build Your Own Professional-Grade Audio Amp on the Sort-Of Cheap

#11
post #2

Oh geez they could have left this statement out: "When I wrote my previous article, class-D audio was fairly new, and audiophiles were still arguing about whether class-D amps could sound as good as class-AB or class-A units. Nobody is having those arguments anymore." Those arguments are still front and center when it comes to amplifier design, both on the manufacturer and consumer sides.

[deleted]

Re: Build Your Own Professional-Grade Audio Amp on the Sort-Of Cheap

#12
post #8

Any recommendations for people that are tempted to build this but should really put their time elsewhere?

I'm not sure I understand your question; what do you mean by "but should really put their time elsewhere"?

Are you asking for an amplifier that would deliver similar performance to this, because you don't have the time to build one, or that you suspect you'll come out ahead on build vs buy because of the price you value your time at?

Re: Build Your Own Professional-Grade Audio Amp on the Sort-Of Cheap

#13
post #6
post #4

I don't know much when it comes to audio amp design, but this reminds me greatly of the O2 headphone amp[0] - that anecdotally a few of my friends have soldered for their personal use. [0] http://nwavguy.blogspot.com/2011/07/o2-headphone-amp.html

I thought of the same thing. Both are inexpensive, straightforward, no-BS projects that leverage the advances made in electronics over the years to deliver quality audio. If I made one of these, I 'd be tempted to put an ODAC and O2 board in the same chassis to have a complete amplifier.

> If I made one of these, I 'd be tempted to put an ODAC and O2 board in the same chassis to have a complete amplifier.

Such a product is available commercially:

> https://www.jdslabs.com/products/48/objective2-odac-combo-re...

Re: Build Your Own Professional-Grade Audio Amp on the Sort-Of Cheap

#15
post #8

Any recommendations for people that are tempted to build this but should really put their time elsewhere?

If you are looking for something already built, the eBay/aliexpress shops of the Shenzhen companies often have the option of selling you a complete amplifier made up of their modules. Which will probably end up cheaper than getting all the parts yourself...

Re: Build Your Own Professional-Grade Audio Amp on the Sort-Of Cheap

#16
It is refreshing to see these types of articles.

Of all disciplines of human interests and hobbies, Audiophiles are one of the most stubborn, misinformed, anecdotal and delusional bunch. Of course I am generalizing, but every time I engage in a discussion about audio quality, it is a losing battle. Not because of lack of data or supporting evidence, but because of the fundamental dissent for data driven arguments. You cannot argue reason when the first step is to be born with "audiophile ears".

Why is it hard to understand that we have sophisticated metrology and instrumentation that can analyze things better than human ears can? I can understand a separate discussion about personal opinions regarding how "warm" a particular sound is, but that should remain distinctly as - subjective and that's perfectly OK.

It feels like the entire audio industry is promoting pseudoscience barring a very few vendors that actually care. We have a $8500 mp3 player from Sony claiming all kinds of things to the overwhelming abundance of cheap Shenzhen exports. There is just so much noise.

I absolutely abhor audiophiles.

Re: Build Your Own Professional-Grade Audio Amp on the Sort-Of Cheap

#17
post #2

Oh geez they could have left this statement out: "When I wrote my previous article, class-D audio was fairly new, and audiophiles were still arguing about whether class-D amps could sound as good as class-AB or class-A units. Nobody is having those arguments anymore." Those arguments are still front and center when it comes to amplifier design, both on the manufacturer and consumer sides.

I think it might boil down to your philosophy on sound reproduction. Do you want accuracy with some potentials for ugliness if you clip, or do you want coloring and musical distortion? I don't think AM radio sounds good at all, but it is sometimes emotionally comforting to listen to. Fidelity isn't everything.

That said, many high end audio folks are straight up whack jobs.

Re: Build Your Own Professional-Grade Audio Amp on the Sort-Of Cheap

#18
Any DAC chip and some usb interface for it that you could recommend to go with this?

And slightly OT, but does anybody know any ABX test of balanced input/output signal? I find it hard to believe that there is a single person who can hear the difference.

Re: Build Your Own Professional-Grade Audio Amp on the Sort-Of Cheap

#20

It is refreshing to see these types of articles. Of all disciplines of human interests and hobbies, Audiophiles are one of the most stubborn, misinformed, anecdotal and delusional bunch. Of course I am generalizing, but every time I engage in a discussion about audio quality, it is a losing battle. Not because of lack of data or supporting evidence, but because of the fundamental dissent for data driven arguments. Yo…

Someone I know was recently trying to have a conversation with an audiophile about the possibility of re-purposing some audio equipment to make noise floor measurements for another system that had similar frequency and dynamic range characteristics.

The technique worked just fine, but man, that guy was loony. He was trying to claim, with a straight face, that a GPS disciplined oscillator wasn't stable enough for his audiophile-grade Rube Goldberg machine.

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