I want to amplify a really low noise condenser microphone (5dBA self noise!), but I don't want to spend a load of money on a preamp for it.
Why not just run it into a portable recorder's mic in, you ask? Well, portable audio recorders' pres are too noisy to take advantage of the mic's low noise, so the end result is just a noisy recording (by 'noisy' I mean that the noise is audible when recording quiet ambience).
So, my question is, would it be possible to use several preamp circuits in parallel to have a low noise output? I'm not quite sure how it works, which is why I'm asking.
My thinking is that the signal coming out of the mic will get amplified by the preamps, with their own noise contaminating the recording, but because the preamps' output signals are combined it would mean that the microphone's signal will be INCREASED, but the noise of each preamp would stay the same because of the different phases. Is there ANY possibility that what I'm thinking might work, or is it a complete waste of time and not worth trying?
Why not just run it into a portable recorder's mic in, you ask? Well, portable audio recorders' pres are too noisy to take advantage of the mic's low noise, so the end result is just a noisy recording (by 'noisy' I mean that the noise is audible when recording quiet ambience).
So, my question is, would it be possible to use several preamp circuits in parallel to have a low noise output? I'm not quite sure how it works, which is why I'm asking.
Rich (BB code):
--| preamp 1 |
mic >--| preamp 2 |>---- line input
--| preamp 3 |