so this is what happens when someone like me tries to provide information. This novice...
Not all headphone outs are made equal. It’s not just about high output impedance. Some headphone outs are afterthoughts in a design process...others are dedicated if you look at the internals.
For example, a series of resistors on a dedicated mainboard connected to ground inside the amp with another wire and a ribbon computer-like cable connected closed to where the main filter caps are is optimized to handle almost any headphone impedance / sensitivity rating expressed in dB.
Some integrated amplifiers also have dedicated volume pots with a series of their own capacitors - made to drive headphones of nearly any impedance. Always check with the manufacturer regarding output power into ohms. (both channels driven or a certain number + a certain number.
For example, quite a few Sony vintage amplifiers only had 25mw into 8 ohms. However, they surely sounded better than the audio output of a smartphone when paired with a good source.
My suggestion for bluetooth would be Audio Technica. If you look at their previous flagship models, such as the ATH-DSR9BT, (used to have it) sold it a while back, you will find that the audio quality is above just good.
With this said, listen to .wav files or .flac with that audio technica headphone, because the tech they use can almost double the data-rate in kbps compared to 320 kbps for .mp3s (1411 kbps for CDs is just right imo).
What kind of sound signature/music do you enjoy the most?
Maybe I could recommend you something great.
I appreciate your enthusiasm and flurry of posting over the last nine months but many of your posts are incomprehensible. This is one of them. Perhaps you know what you are talking about, perhaps you don't. On it's surface, what you wrote is utter nonsense.
Thanks a lot for your rudeness fsonicssmith1
If you actually spoke to people who design amplifiers, they would tell you the same thing.