pirad

Responses from pirad

new GAN amplifier
Is it not demonstrated that a true flying machine, self-raising, self-sustaining, self-propelling, is physically impossible? — Joseph LeConte, November 1888It is apparent to me that the possibilities of the aeroplane, which two or three years ago ... 
Do we really need anything greater than 24/96? Opinions?
Indeed there are numerous problems with this AES paper and one of them is raised in the discussion: how can one train for unknown causes? The author’s answer is not convincing to me. https://secure.aes.org/forum/pubs/journal/?ID=591Metaresearch ca... 
Do we really need anything greater than 24/96? Opinions?
Is the Earth flat and in the center of the universe? Opinions? 
Do we really need anything greater than 24/96? Opinions?
https://people.xiph.org/~xiphmont/demo/neil-young.html44.1/16 is enough for any stage in the signal chain, even more so at the playback. Some oversampling at the mastering/AD/DA conversion -sure. 24 bit is because of lazy/sloppy engineers. Good re... 
new GAN amplifier
Like the Halcro Eclipse  with its incredible specs; 110kg/250 pounds, 135,000$ 😉 
new GAN amplifier
You asked for the file, Amirm said he didn't have it and you said "If you don't have it that's fine". It's all there if anybody wants to read this interesting thread. 
new GAN amplifier
https://www.audiosciencereview.com/forum/index.php?threads/review-and-measurements-of-purifi-1et400a...The above was explained ad nauseam from post #558 in this thread at ASR 
new GAN amplifier
All digital audio is built around the sampling theorem, not the other way round.  There are places in the signal chain where high sampling rates make sense. The final reproduction stage is not one of them. Why, and how it can be harmful is well ex... 
new GAN amplifier
>100kHz response?  Some species of bats indeed can detect 200kHz but they can't hear the human range sounds.Then there is the question of transducers, I think I came across once a lab specimen that goes high ultrasonic. Then there is the proble... 
new GAN amplifier
arty_vandelayYou wrote: "Distortion (IMD) is still higher than a decent classic blameless AB design above 10kHz." Do you mean this part of Amirm's test: "I was surprised to see the rise in distortion with frequency. I had hoped that the super high... 
new GAN amplifier
arty_vandelay,Please compare data for your favorite top A/B amp U-LD Mk4, given by the creators at www.siliconchip.com.au (August 2015) and the newest D-class from Bruno Putzeys - Purifi 1ET400A (www.purifi-audio.com). The D-class beats the A/B in... 
new GAN amplifier
Hypex ncore nc1200 doubles the output at 2 ohm. Georgehifi builds the Lightspeed Attenuator that measures poorly but sounds decent. He has this obsession of GANs that have one metric pumped up, cost more, but do not perform better than ncores or P... 
Design a $60,000 Speaker - Start here
60k speakers is veblen goods territory. Anything for home use priced like that is - IMNSHO.PS. 60k worth of home equipment carries the annual secondary carbon footprint of 20 tons of CO2 ( connected to the manufacture). Add the electricity used fo... 
Why the fascination with subwoofers?
Human hearing below 20Hz is described in this paper:Hearing at low and infrasonic frequencies Moller H, Pedersen C S - Noise HealthGood site with audio tests including subs:(this direct link also tells when you are hearing sub overtones- not good)... 
The Carver Amp Challenge and the 21st Century and it's Failure
Bruno Putzeys claims that he can make his n-core amplifiers sound in any desirable way. The OEM line is bufferless, manufacturers can bring their own sound with the buffer construction. I tested some of them (including those based on the expensive...