Martin B. Kantola
Well-known member
- Joined
- Jun 24, 2005
- Messages
- 209
For experimental use I will need a microphone preamplifier, must have standard +48V phantom feed and typical input impedance (2k) because I'll use it to test typical condenser microphones. Well, maybe not so typical...
The only important is to get the noise as low as possible, even if it means sacrificing other qualities. Frequency response, distortion, output impedance or offset etc. are not critical. About 60dB of gain should do, but another 10dB would be great.
My question is which path or combination to choose for best results:
- dedicated chip such as THAT 1502
- low noise OP such as LT1115
- transformer input (higher than 1:4 ratio?)
- discrete bipolar input pair
- some kind of cooling arrangement?
- parallel devices
And ideas appreciated. The more creative (crazy) the better...
Martin
The only important is to get the noise as low as possible, even if it means sacrificing other qualities. Frequency response, distortion, output impedance or offset etc. are not critical. About 60dB of gain should do, but another 10dB would be great.
My question is which path or combination to choose for best results:
- dedicated chip such as THAT 1502
- low noise OP such as LT1115
- transformer input (higher than 1:4 ratio?)
- discrete bipolar input pair
- some kind of cooling arrangement?
- parallel devices
And ideas appreciated. The more creative (crazy) the better...
Martin