I have recently been reading up a bit about low pass filters, but am struggling to calculate values.
I intend to build the low pass filter shown here:
http://www.t-linespeakers.org/tech/...assiveHLxo.html
It will be installed between the speaker posts of a valve amplifier (that will continue to drive the main speakers) and the inputs to a transister amp that will drive the subs.
I need a second order filter (12db) and a corner frequency of 75Hz. This, I think, will require just 2 resistors and 2 capacitors per channel - but what values?
Can you help, and if possible show me how the calculation is done so I can help myself in the future.
Thanks
😕
I intend to build the low pass filter shown here:
http://www.t-linespeakers.org/tech/...assiveHLxo.html
It will be installed between the speaker posts of a valve amplifier (that will continue to drive the main speakers) and the inputs to a transister amp that will drive the subs.
I need a second order filter (12db) and a corner frequency of 75Hz. This, I think, will require just 2 resistors and 2 capacitors per channel - but what values?
Can you help, and if possible show me how the calculation is done so I can help myself in the future.
Thanks
😕