Sorry I can't compare the DE31MS to th eloops that you have specified
as I do not own them I can, however state the following -
The Degen loops are cheap and cheerful, They are not the best made
units but are good value for money if portability is desired.
I have compared my DE31 to a Sony AN-LP1 and an AOR LA320. In both
cases it produced inferior signals. You do tend to get what you pay
for with these commercial active loops but no one can argue with the
value for money (VFM) aspect of the Degen series. I probably couldn't
build such an active loop for the price I paid (DE31 $16 delivered
from China).
I consider the Degen loops to be a useful addition to my loop arsenal
for portable work but they are not the best in my collection by a
long way.
It is interesting to note that the Sony LP1 also uses a single turn
loop and unbalanced FET amplifier. It's performance is excellent so
it would appear that the Sony uses a better pre-amplifier design.
Regards
Fraser
