Is this a low pass filter?

[cosmic_ninja]

I'm guessing it is. Can someone please tell me what components do I need to make a similar one (see pic or link) for a mini subwoofer (6 ohms and 3w)? I bought several 1000uH inductors but it doesn't seem to work.

 

[davenn]

Can someone please tell me what components do I need to make a similar one (see pic or link) for a mini subwoofer (6 ohms and 3w)?

most reasonable sub-woofer filters are active filters and are in circuit BEFORE the amplifier that feeds the sub-woofer speaker

see examples below


https://www.bing.com/search?q=audio...s=n&sk=&cvid=272b3f18f99348d5bb52640e7452961f

 

[Audioguru]

The speaker and its enclosure you are using as a sub-woofer cannot produce low frequencies because they are too small and the enclosure is not designed properly. Did you try the little speaker by itself to hear that does not produce low frequencies? A lowpass filter passes low frequencies that the little speaker cannot produce.

It looks like your stereo has two midrange tweeters. It has no woofer. A cheap woofer is a 4" 15W speaker in an enclosure designed for its detailed spec's or recommended by the speaker manufacturer. Then a sub-woofer could be a high quality 8" 25W woofer or a less expensive 10" or 12" 40W woofer in an enclosure designed for its detailed spec's or recommended by the manufacturer.

 

[WHONOES]

If you are in the USA, have a look at the Madisound website.