I've got the old master kit hanging out, but the 24 dB/octave modules only go down to 50Hz in pre-built. I do have blanks available, and according to the document I'll link below momentarily, you'll need to solder in 8 470KΩ resistors to get 15Hz. There's also a formula on the document you can use to achieve a lower frequency is 15 isn't low enough for you.

Note 1005 (audiocontrol.com)

 

I've got the old master kit hanging out, but the 24 dB/octave modules only go down to 50Hz in pre-built. I do have blanks available, and according to the document I'll link below momentarily, you'll need to solder in 8 470KΩ resistors to get 15Hz. There's also a formula on the document you can use to achieve a lower frequency is 15 isn't low enough for you.

Wow, sleeves... I didn't think this post would go anywhere! Now that I look (and confirmed by @Nemisis87), you're right: The PFM subsonic module is a 14-pin DIP header (18db/octave).

I have a soldering iron (newly purchased). I'm not great at it, but I might try my hand at fashioning one.

Thanks for the reply!

 

Darn, I just gave away a bunch of these! Hit up @buffalobill989 to see if he’ll send you one or two chips.

You can also buy them from Mouser. The PFM uses 18dB high pass, 7 resistors/14 pins and not 8/16 like the 24dB high/low crossover.

 

Thanks for weighing in, Nemesis. I've never heard of Mouser, but I'm checking out their site now. They have all kinds of goodies!

I might send a message to buffalobill. Thanks for the tips!

 

Not sure what you will need. If I have it and won't need it. I would be happy to send it to you. We still have a few weeks of sprint car racing left before we can spend time to install. Hell we've had the box pieces cut for 2 weeks and still need to put it together. Let me know what you need and I'll see what I have.

 

Hey, Bill... super kind of you to chime in. I'm was looking for the 14-pin DIN header and transistors for 15 Hz (470 kOhm) or 20 Hz (360 kOhm). Didn't know if anyone had any lying around...

Good luck on your install!

 

I'll look through what I have. I don't think I will need anything that low.