Audio Frequency Response?

20 to 20 kHz (=20,000 Hz) is actually pretty much the range of human hearing, so you're not going to have to go beyond that. It is most certainly better than the other, which has a whole lot of stuff missing from the high and low end of the spectrum.
However, depending on the exact specs these figures are based on and given different tolerances, the 100 to 12.5 kHz (which is what is meant here, not 12.5 Hz as you wrote) might just be more honest, which I doubt, though. These numbers are really not good for an audio playback device. Also, the audio quality you're hearing (including frequency response) will depend a lot heavier on the quality of the headphones used, not on the player.
Just out of curiosity: Which other device is it?
Hope this helps.

Having been an audiophile for decades I can tell you specs lie. Cheap audio equipment often has specs that ON PAPER best units costing literally 100 times as much. It's best to read trusted sources for reviews and use your own ears. I learned about the "arms race" in specsmanship back in the 70's when I was in and out of high end audio salons for years, replacing components in my home system. I finally got what I really like when I got, among other things, a Mark Levinson amp. NOTHING beats listening and since our ears have short term memory, the best way to know which of several pieces of equipment are best for you is to do a carefully controlled A/B test. A/B tests CAN be biased, but done fairly (no salesman shenigans) they are the best way to know which item to buy (presuming your pocketbook matches the quality of your hearing) 🙂

Message was edited by: David.

Message was edited by: David.