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Comment by clolege | Hacker News Reader

Where do you get your recordings from?

It bums me out that most music recording and reproduction equipment drop off drastically outside 20-20,000hz. I wish that we could open that range up a bit more, the low end for haptics and the high end for the other beings in our house that can hear in that range (dogs, cats, etc)

The new amplifiers from Purifi are incredible when it comes to delivering a flat response to 0hz, at high power into complex loads.

I’m curious to see if I’ll be able to tell a difference in how their amps coupled with their new power supplies drive my ButtKickers :)

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I wonder if you could just transpose the lower end, say 20-30 hz down to the 10-20 hz range since you can't hear them anyway so it won't sound bad, but you would "feel" it.

That’s what subharmonic generators do and I’ve heard mixed reviews.

Like, if you were to take the bottom octave of a piano pieces and replicate it on the next octave down, it could easily sound like crap. Might sound decent for some songs though?

I've got a lot of classical SACD and DSD recordings from many moons ago that were mastered very well.

You are right that you need to pay attention to the entire signal chain. A bad DSP or DAC somewhere in the middle will make your quarter ton of LFE completely worthless.

It's not even necessity a "bad" device. Sometimes circuit designers add a DC blocking capacitor on an input to avoid damage to the equipment (especially in an high powered analog amp you might want to avoid feeding DC into the speaker).

The digital domain is much more forgiving; reason why I preach going all-digital up until I2S into the class-d amp IC :) (No, I don't do that at home due to lack of available equipment - I'm still fully analog after the DSP/DAC combo).

One producer: Dillinja [0]

[0] https://www.discogs.com/artist/315-Dillinja

Reading the article, his track "30hz" was the first thing that came to mind. :)

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