Hello everyone, small insert here - I like using low frequency tactile transducers, also known as bass shakers for the reproduction of infrasonics. Attached to a structure you sit or lay on, you ¡°feel¡± the bass. Regards, Jonas
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On 23 Feb 2024, at 00:06, Richard Lee <ricardo@...> wrote:
?An omni electret's LF response is usually limited by
- the small hole which prevents it acting as a barometer
- the electronics.
The hole is easily seen on the side of a B&K capsule but should be easily identified in eg a PUI 5024.? Just put a SMALL drop of cyanoacrylate to seat it off and the acoustic bits will go down to 0Hz
In SimpleP48.pdf, making C1 = 22u should get you at least -3dB @ 4Hz and probably better than that.
Most modern preamps using THAT 15xx etc will have LF limits set by the input capacitors to deal with LF current noise & hot plugging ... usually 22u too so with 3 of 22u in series, -3dB @ 12Hz?
There's also the capsule capacitance and the FET input but in PUI 5024 etc and SimpleP48, that's way below the above factors.
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None of the other suggestions have the inherent subsonic performance of an omni electret.
