How To Make Passive High Pass Filter?

[cacao ambiance]

oh, looks like there is such a thing as non-polarised electrolyte caps:
Alcap 200.00uF 50V DC Electrolytic Capacitor non-polarised Standard series from Falcon Acoustics, The Leading Supplier of DIY Hifi Components.

Using the search term bipolar , found some 100uf from china:
10pcs NEW Nichicon MUSE BP ES 100uF/50V (Bi)Non Polar Nonpolar Bipolar HiFi Audio Capacitor-in Inductors from Home Improvement on Aliexpress.com | Alibaba Group

Are 50V rated ones ok with TPA3250 amp powered by 48V?

I can only find 100uF and 120uF 100v rated ones:
Alcap 100.00uF 100V DC High Power Electrolytic Capacitor non-polarised series from Falcon Acoustics, The Leading Supplier of DIY Hifi Components

 

[DEAFASABAT]

oow goodie help already! 😀

was hoping for something generic that i can swap between amps.
I use tpa3116/8, irs2092,tpa3250, tas5611, tpa3255, tk2050. I mainly use the tpa3116 black board for these speakers. I have attached the 2 Input Impedance related pages from the datasheet for the tpa3116. next looks like i need to find out what gain resistors are used to know the Input Impedance, right?

next ill get photos of the speakers

If you do come up with a working passive high pass network, it could be interchangeable only if the amps' input impedances are all the same. Possible, not too likely. Better to have a tailored network for each amp you use. -daab-

 

[DEAFASABAT]

Hello cacao ambiance,

If I understand your question correctly, I had a similar issue a while ago. Due to room placement, my right speaker had a bit more low bass output than the left speaker, so I wanted to tame down the one with more output. My solution was to insert a capacitor between the output of my preamp and the input of the power amplifier for the right channel. I worked up a little spreadsheet to calculate the capacitance needed for the known input impedance of the power amplifier.

The first figure shows the simple schematic and the calculations for determining the -3dB frequency. The second figure calculates and plots the response curve.

In my case I used a pair of 0.1 MFD MusicCaps in series to get 0.05 MFD or 50 nF, which I thought was close enough to the calculated 47 nF for this application. This solution worked fine to tame the low bass output so the two speakers were better matched.

I hope this will be of some help.

Cheers,

ceulrich

So a first order, 6db/octave function did the trick? If so, it makes it fairly easy vs. implementing a second or higher order filter.

 

[DEAFASABAT]

Fast Eddie D wrote: "With passive you're pretty much stuck with 3 dB/octave. Otherwise go active."

Should be 6db/octave, using just one capacitor.
-daab-

 

[Fast Eddie D]

Fast Eddie D wrote: "With passive you're pretty much stuck with 3 dB/octave. Otherwise go active."

Should be 6db/octave, using just one capacitor.
-daab-

Yes, you're correct. I'm thinking -3dB frequency.

And I was proven wrong anyway, with the link to second order passive filters.

 

[cacao ambiance]

hmm arrghh.. which brands alcap or nichicon or unknown or Mundorf?

unknown ones: 200uf Electrolytic Bipolar Capacitors. BULK BAG 50

Nichicon: 10pcs NEW Nichicon MUSE BP ES 100uF/50V (Bi)Non Polar Nonpolar Bipolar HiFi Audio Capacitor-in Inductors from Home Improvement on Aliexpress.com | Alibaba Group

Mundorf:
Mundorf ECap AC 390uf 63V Bipolar Electrolytic Capacitor - RAW

Alcap: Alcap 100.00uF 100V DC High Power Electrolytic Capacitor non-polarised series from Falcon Acoustics, The Leading Supplier of DIY Hifi Components

 

[PRR]

With passive you're pretty much stuck with ....

Aside from the 3/6 typo---

ANY order passive filter can be built.

With caps and coils, any filter function can be done.

With only R-C (no coils), high-order filters are pretty lame (instead of a corner they roll off very slow).

In audio, where coils are extravagant, active filters are miracle workers.