I also bought astrotec AM800 based on the review here but i found them lacking in bass. 1. The sound is clear and very bright as described but there is no deep bass to be felt or hear at all. 2.They sound is very loud on my smartphone -- on the past i  have tried some Sony 16 ohm 100db + also...

Ok i consider buying those headphones based on the reviews but i have a couple of questions and looking for suggestion from the experienced users from this site.   1.I like the signature sound Samsung headphones have like HS330.   The headphones will only be used for my smartphone(galaxy beam)...