Just long enough for the magic smoke to escapeIt would last precisely.....that long.
Just long enough for the magic smoke to escapeIt would last precisely.....that long.
That setup is only good for relatively high distortion amplifiers. It is not suitable for anything of the class of amps we are talking about here. I had to put a lot of care in my dummy load design to measure distortions that are -130 dB down.Howto - Distortion Measurements with REW by xrk971
https://www.diyaudio.com/forums/solid-state/338511-howto-distortion-measurements-rew.html
I had to put a lot of care in my dummy load design to measure distortions that are -130 dB down.
Hypex brought a paradigm shift onto the "hi-fi" DIY audio market. You can get FA122 for 300.- euro with remote. It's a stereo n-core plate ampwith a great DAC (AKM) and DSP. Put it into a nice old wine box and 99% of the population won't be able to tell the SQ difference in direct comparison with any amplifier possibly costing 30x more.
Next marketing model? IKEA-like "order-by-website" electronic innards and the case to taste to put together at home in 10 minutes.
Or "ready-made" box for 20$ extra.
in PROFESSIONAL auditory tests. That has been my experience with n-core and AKM DAC, anyway.
I am skeptical about vinyl rips having the detail necessary for resolution tests.
Also the range of the test music must be wide: vocals, single instruments, percussion, chamber, orchestra, jazz...
The crude "DR meter"is not really a metric how good a recording is. It simply compares peak and RMS levels.
Even with the same master the processing for vinyl will often result in spikier waveform. This reduces the RMS
and results in higher DR values. The processing can use filters that change broad peaks into alpine rocks
and/or the stereo separation and deep bass are reduced for the limited medium. The vinyl playback system can also
change the DR. Eg. the poorer the bass reproduction the higher the DR.
I know very well that DR is not everything, nor do excellent measurements necessarily indicate a fantastic sound.
Dire Straits - Dire Straits (1978), Vinyl, Vertigo, UK
https://www.diyaudio.com/forums/music/6958-playing-listening-post5839810.html
Same vinyl and system but with other cartridge and something more. Same DR. With the new cartridge the sound is BETTER.
https://www.diyaudio.com/forums/music/6958-playing-listening-post5839812.html
Well, you changed your original post by deleting the vinyl cover and track DR figures.dr.loudness-war.info Jethro Tull - Aqualung
CD, Vinyl... if you have not done dirty with the CD or odd things with the vinyls the DR is very similar or the same.
I listen to music regardless of the format, I look for the best sound possible and that excites me. It is not my fault that many do their job badly despite the best current technology.
If I put the DR is to raise awareness of the loudness war.
No the key is controlled listening tests, and no amount of carpet bombing threads with your untested opinions is going to change that.The key is the type of the music.
The intermodulation effects of ultrasonic content were studied in this paper.In Benchmark's literature, they state the following (https://benchmarkmedia.com/blogs/ap...ory-use-of-the-benchmark-ahb2-power-amplifier):
The important difference between the AHB2 and class-D amplifiers is that the AHB2 does not produce switching noise. Class-D amplifiers are measured with brick-wall AES17 filters that ignore the switching noise above 20 kHz or 40 kHz. Tweeters can demodulate this ultrasonic noise and fold it into the audible band.
Some of us (at least me!) can't help wonder if there could be some kind of harm from having the ultrasonic noise. Really I think I am fairly well convinced that this is harmless, but I would like to hear what you have to say about the above, and your response to any other critical points you have heard regarding Class D ultrasonic noise.