> The specification page of the R-26 says that the input impedance of the p=
lug-in powered mic inputs is 3k or 2k ohms (http://www.roland.com/products/=
en/R-26/specs.html), which is even lower than the XLR inputs (5k ohms).
>
> So, I believe that here is a good chance that these 3.5 mm inputs provide=
decent quality similar to other recorders, such as the Olympus LS-xx, SONY=
PCM-M10 or Roland R-05.
Mic input specifications often are quoted for the intended mic impedance ra=
ther than the actual input impedance; in this case, however, it seems to be=
real, because different values are given for different sensitivity switch =
settings.
Am I correct in believing that the output impedance of a typical PIP mic is=
in the 2K-3K ohm range? If so having input impedances in the same range is=
kind of low; more like the old-fashioned "matching" than the current pract=
ice of "bridging," i.e. having a preamp input impedance that's 10x or more =
the mic impedance.
Does anybody know what the actual input impedances are of some of our famil=
iar PIP-input recorders, like LS-10, H2? Maybe we've been matching all alon=
g in the PIP world.
Mics have higher output levels and have flatter response into higher-impeda=
nce inputs. Preamps with lower input impedances have less noise. A design t=
rade-off.
-Dan
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