LSA Voyager GAN Amplifier

Because performance within the audible band is what audiophiles care about. But some folks must only listen to music where all the tones are at 1khz. So this test would be meaningless for them.

1khz is within the audible band. I’m guessing 1 khz is chosen because its harmonics are within a reasonable range. Perhaps a sweet spot. Not sure.

Some people may actually wish to listen to a 1khz tone, but there are probably other meaningful therapeutic influences in play should they wish to do so..

You may wish to listen to a 15khz tone by what you have said. A most interesting anomaly.  I don't think it would be very pleasant.

The point of the 15khz tone is to see if the amp struggles with those frequencies. As most amps have a much harder time as the frequency climbs above 1khz. And there’s meaningful content in music above 1khz.

Most audio specs aren’t to prove how good the gear handles music. They’re simply for marketing purposes. And when the consumer doesn’t understand what actually matters, 1khz is enough to get the job done. ASR is a great example. The quality chart that everyone buys gear based on is all of a 1khz THD+N spec. So Amir's partners (Topping for example), just need to design gear that maximizes that spec (sound quality with music irrelevant), and the commissions come rolling in from the frenzy of sales. 

As most amps have a much harder time as the frequency climbs above 1khz. And there’s meaningful content in music above 1khz.

Quite some time ago someone here was seeking a musical CD player.  They chose a Yamaha CDP, because Yamaha also make musical instruments.

Were you that person?

I would be really interested if you could show that they make even a 10th of a dB difference to the noise floor. In practice that seems difficult at best since you'd need an anechoic chamber to prove it.

Why would an anechoic chamber be required? The proper way to measure the noise and distortion of the system before the drivers is an audio analyzer. Would you measure an amplifier though a speaker in an anechoic chamber?

In case anyone cares, since Mike is too lazy to read the full test or understand the measurements, here is what is in it:

1. SINAD at 1KHZ
2. SNR - 20Khz  (for these two, it s noted that the gain is only 19db which improves the result)
3. 32 tone multi-tone IMD, far harder than 1KHz + 15KhZ. This spans from 20Hz to 20KHz, and if you know how to read it, you can see the impact of harmonics from multiple tones.
4. FR into 4/8 ohms
5. High frequency unattenuated switching noise
6. 1K-20KHz crosstalk
7. THD+N from 50mW to 100W at 1KHz, 4 and 8 ohm, 45KHz at 20Hz, 500Hz, 1KHz, 5KHz, 10Khz, 15KHz.

Has @mivmike never read past the first page or does he not understand the rest of the measurements?