er6i and um1 sounds good. er6i got slightly better clarity. but um1 got more bass. not that much more. i say get um1 as it is more versatile plus it is more comfortable. build wise, i am not so sure.
anybody who knows the thing, with or wothout any qualifications, can do it. but, qualifications is needed to get an advantage to get the job, as most would agree.
yap, doesn't mean having a diploma or degree means you have better knowledge in a certain field than someone with any qualification. but, most of the time, the educated one is more knowledgeble.
i need to know any sources apart from farnell and federal to get opa227 or opa2227? i know that koba only has 234 and 604 left right now.
also, i would like to know if there are like the Analog Devices series amps available anywhere.
thanks.