You're sending a source -- a DAP? a computer? a phone? -- into a DAC/Amp. Doesn't your source have a headphone jack?

With sensitive IEMs you could also skip the DAC/Amp and plug into the headphone jack....just saying...

You might want to post this in the Grado Fan Club forum. https://www.head-fi.org/threads/grado-fan-club.530965/page-4377

It sounds like your dongle is malfunctioning. Does Apple sell in Moldova?

If you like Beyerdynamic's fit and approach, there's the fairly recent DT700 Pro X. https://www.amazon.com/beyerdynamic-Closed-Back-Headphones-Stellar-45-Monitoring/dp/B09G75RWN2?th=1 By all accounts it tames the treble peaks of the DT770 and DT880. They are closed-back, so not the hugest...

It seems like that your Ali dongle is not doing a good job. You might try the $9 Apple dongle and see if it does better, at apple.com . It doesn't amplify but it does have well-measured specs as a DAC. https://www.apple.com/shop/product/MU7E2AM/A/usb-c-to-35-mm-headphone-jack-adapter Shanling...

I have tried a lot of budget-fi hype trains here on Head-Fi. Most aren't bad. Exaggerated bass, shrill or metallic treble. But over $100 (IEMs) or $200 (headphones), I expect something serious -- not a fast-food boom-sizzle salt-fat blast but something that respects the original production.

ATH-MSR7b are low-impedance, high-sensitivity, meant to play with anything. iPhone DAC is good and you don't need extra power for those phones. Just plug it in and rock out!

There was an old, old audiophile refrain: "No highs, no lows, must be a Bose..." I think your audio horizons are about to expand significantly.

There is a whole Sound Science section on this site where knowledgeable people try to deal with marketing hype -- and get a lot of pushback. Mechanical, physical things -- headphone design, pads, eartips and also the loudness level of the music (because hearing responds differently in loud and...

Not an unpopular opinion at all. The headphones are crucial. The other stuff is incremental at best -- and I think a lot of the perceived improvements are placebo effects. Yes, an amp will help if the headphones need the power. But at the moment you can get an amp with perfect measurements for...

Your new headphones have more midrange -- the range of vocals and instruments like guitars and horns -- than the Airpods, so vocals will be more upfront. Have you tried listening to live albums? Stop Making Sense, Nirvana Unplugged, Live/Dead, Aretha Franklin at Fillmore West, Radiohead's I...

Audeze, Dan Clark Audio and HiFiMan have good reputations. You might look in Classifieds here to find more affordable used sets. You'll want to factor in an amp if you get planars. And they are heavier.

What connection is the phone output? If it's USB-C the VE Megatron is a monster -- $56 shipped to USA. https://www.veclan.com/engappliance_sel_one?eng_ApplianceVo.eac_id=63

If those have been your headphones, then any of the choices mentioned above is going to be mindblowingly better and you don't need to be spending thousands of dollars. If you search around this site you'll run across the concept of "diminishing returns." Twice the price just doesn't bring twice...