I've been using PC350s for quite some time now and I was satisfied with the sound (no amp and onboard real tek). However, a buddy of mine told me that I need to get an amp as it drastically improves the sound quality. Recommended this one, http
/www.amazon.com/Kilimanjaro2-E11K-Headphone-20Hz-20KHz-16-150Ohms/dp/B00MFMW29I/ref=sr_1_3?s=electronics&ie=UTF8&qid=1432429335&sr=1-3&keywords=fiio+amp
Now, I've done some research and I've got multiple answers. Some say since the impedance is 150, an amp is necessary. Some say a good soundcard is necessary. And finally, some say both an amp and soundcard are a must for this headset.
So, let me ask you, do I need an amp?

Now, I've done some research and I've got multiple answers. Some say since the impedance is 150, an amp is necessary. Some say a good soundcard is necessary. And finally, some say both an amp and soundcard are a must for this headset.
So, let me ask you, do I need an amp?