Hi guys. Im very new in the audiophile world and I just acquired a superlux 668b. Im quite interested in this DAC and would greatly appreciate it if any members could shed some light on this.

Would it make any improvements if I connect it to my macbook pro > DAC > headphones?
And is it plug and play or do I have to configure it/change any settings in my control panel?

Is there a significant difference between this and the UD100? Im on a tight budget atm (student) and was wondering whether to splurge another rm60++ for the UD100. Im not an expert in determining audio quality tho. So I just want to know whether someone like me could distinguish the quality between these two DAC's.