Low Frequency Audio Preamp

Low Frequency Audio Amplifier Using the LM386 : 6 …

https://www.instructables.com/low-frequency-audio-amplifier-using-the-LM386/

Low Frequency Preamp | All About Circuits

https://forum.allaboutcircuits.com/threads/low-frequency-preamp.70184/

I really like this preamp, having used it before, but as you'll see from the frequency response the roll off is pretty bad below 100Hz. http://www.zen22142.zen.co.uk/Circuits/Audio/lf071_mic.htm Ideally, I'd like something with little roll off at very low frequencies (around 2Hz), lower power requirements than the one posted …

The Design of Low-noise Audio-frequency Amplifiers

http://www.keith-snook.info/Stuff-you-should-read/Faulkner%20-%20The%20design%20of%20Low-noise%20audio%20frequency%20amplifiers.pdf

THE DESIGN OF LOW-NOISE AUDIO-FREQUENCY AMPLIFIERS considering current ratios, without explicitly referring to the magnitudes of the voltages appearing at the amplifier input terminals. A great deal of confusion has arisen over the rela­ tion between noise figure and input resistance. It should be clear from Fig. 3 that if an amplifier has a

12 Best Phono Preamps in 2022 - Theirishcurse.com

https://www.theirishcurse.com/preamps/best-phono-preamp-reviews/

This phono preamp has good dynamics, very clear sound, and excellent instrument separation. If you choose a low frequency of 20 Hz, then it helps prevent the hum. SPL’s VOLTAiR technology uses an unusually high voltage, offers the advantages of an extended dynamic range.

Simple JFET Audio Preamps - Ciphers By Ritter

http://www.ciphersbyritter.com/RADELECT/PREJFET/JFETPRE.HTM

Here is a tested design for a simple, relatively low-noise, JFET-input, 3-transistor audio preamp, designed to satisfy various goals: Minimum Components: Three amplifying transistors and a few resistors and capacitors. Battery Operation: Use a single 9V battery down to 4V. Low Current: Typically under 2mA down to 0.5mA or less.