[LAU] Portable Digital Recorders

[fons at kokkinizita.net]

On Mon, Feb 01, 2010 at 09:00:31PM +0100, Jörn Nettingsmeier wrote:

> if that means what i think it means (equivalent input noise), and i'm 
> not totally out of touch with the state of preamp technology, i'd say 
> all but the 106, the 99 and the ? are bogus. and i'm not even sure about 
> the 106 :)

First of all, all these numbers should have a minus sign in
front of them, and for them to be informative at all I'd 
want to know if they are dBu or dBV.

99 and 106 are *very bad* - how does one design a mic preamp
to be that bad ? Use a 714 wired as differential amplifier ?
Things start to be interesting around -125 dBV and below.

Figures in the below -125 dBV range require either a transformer
(big, expensive, heavy) or some quite nifty (again expensive)
input circuit design. 

Ciao,

-- 
FA

O tu, che porte, correndo si ?
E guerra e morte !