LSA Voyager GAN Amplifier

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?

And the only thing ASR sycophants care about is 1khz SINAD. Here’s the holy grail for them. The best way to land sales is to keep the consumer dumbed down to only needing to understand 1 number.

If Amir really wanted to educate people. this chart would be of THD+N vs power vs frequency over a 20-20k bandwidth. But his Chinese partners would have a harder time winning that game.