i have pairs of both DPA 4006s and the little 4061s, and they are
vastly different in tonal response. the pattern is amazingly omni on
the 4061, but it defintely exhibits a noticeable high0end lift - this
is great for acoustic guitar, and some other applications, but it ain't
so good for live ensemble work or for acoustic instruments that contain
significant high freq's like strings, woodwinds, etc. the larger 4006s
display a nicely "flat" freq response curve, and are useable on
literally anything, IME. for a less expensive, generally flat response
omni, i cannot recommend the AT4049 or its cardioid version the AT4051,
as they are both rather bright to me (i do own a pair of hte 4051s that
i use on some warmer sources). instead, check out the AKG c480/ck62
and its cardioid version the ck61 - wonderful mics that can be had for
a song and a dance compared to the DPA prices. i use the c480/ck61 on
all types of things, and have found it nearly interchangeable with my
DPA 4011s.