Re: Olympus LS-14 initial thoughts

["Raimund" animalsounds]

> To get technical, the input noise impedance (optimum for noise) of a
> direct solid state input will not match a mic at 150ohms without a
> transformer.

David,

I think that this not an issue anymore with modern operational amplifiers. =
The spec sheets of the best recorders with transformer-less inputs all exhi=
bit an EIN of -130 dBu(A), which I believe cannot be surpassed by transform=
er-based preamps.

See for instance this integrated instrumentation amplifier that has been sp=
ecifically optimized for mic preamps:

http://www.ti.com/lit/gpn/ina163

Read the NOISE PERFORMANCE section at page 6.

Regards,
Raimund