Just received my 58x today, I don't have a DAC/amp yet so driving them with my onboard Realtek card. While they sound great so far, I have them at 100% volume and would still like to amplify the sound more, especially the bass. Would this amp do the trick? Also found this amp "New" on ebay $48.95 here and wonder if it's legit. https://www.ebay.com/p/FiiO-E10K-DAC-Headphone-Amplifier-Black/15019370995?thm=1000&chn=ps
deshanMate, wait out on the Fiio E10K. Fiio has the successor coming out very soon!
https://www.head-fi.org/threads/new-desktop-usb-dac-amp-fiio-k3-e30-384k-32b-dsd-dop-typec.883341/
If you truly have to buy it, then go ahead but yeah...Fiio will be releasing the K3 very soon, which is looking to be a great budget DAC/Amp combo.
And Yes, your onboard soundcard would be struggling to push the 58x.
Hope this helps!