Currently building this crossover Id like to use it for subs.
What Size caps will I use to Have a 20 hz Rollover point?
What Size caps will I use to Have a 20 hz Rollover point?
Your question implies a passive crossover, but neglects to mention the speaker impedance much less the inductor(s) and the order of the filter or the circuit. But a passive crossover is generally a bad idea for subs because a sub is maybe 10dB less sensitive than the full range drivers, so a sub driven from a full range amp through a passive crossover is almost useless. If you want a sub, you need a 2.1 (etc) channel amp with a gain control for the sub.
Also, 20Hz is not a rational frequency for a crossover. It might be a reasonable sub-sonic filter frequency but a bit high. Generally, a sub needs to work from maybe 10Hz to 90Hz.
Also, 20Hz is not a rational frequency for a crossover. It might be a reasonable sub-sonic filter frequency but a bit high. Generally, a sub needs to work from maybe 10Hz to 90Hz.
Im pretty sure the range of the supplied caps in the kit for this unit provide a appox 380-1.2 range of adjustment.
Like to maybe do a 20Hz to 100 hz or similar with ths 6-24
I am Now doing this with a Behringer Xpro. But kind of like to substitute this unit in.
Like to maybe do a 20Hz to 100 hz or similar with ths 6-24
I am Now doing this with a Behringer Xpro. But kind of like to substitute this unit in.
Here is a link:
Mike Rothacher's filter application from: http://doublesecretlabs.com/apps/passxo
This is from the 6-24 article Nelson wrote.
Mike Rothacher's filter application from: http://doublesecretlabs.com/apps/passxo
This is from the 6-24 article Nelson wrote.
So you are talking about the Nelson Pass JFET active crossover. Nelson gave the formulas for the capacitor values in the article:
Assuming you are not connecting the power supply transformer ground through the PCB, the only way you might get hum is if you need a ground lift between the circuit ground and AC safety ground.
https://www.diyaudio.com/community/attachments/diy-crossover-6-24-pdf.1244823/
Assuming you are not connecting the power supply transformer ground through the PCB, the only way you might get hum is if you need a ground lift between the circuit ground and AC safety ground.