BF-500 // Butterworth Filters in 500 Format

[elskardio]

Hi Guys,

A few months ago a colleague ask me if I could build a simple LPF & HPF in 500 format. Here's the result 

- Independent In/Out switch for both bands
- 6 dB/oct switch for both bands (12 dB/oct. default)
- Bump function on the HPF (à la Harrison) = 5 dB (modified to 3 dB) resonance around the cutoff frequency.
- LED indicator on every switch

Cheers

Gabriel
Chambord Audio
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If you're interested in purchasing a BF-500 module,

you can place your order here: https://chambordaudio.com/product/bf-500-filters/

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- Frequency response of the actual Hardware unit showing the 2 slopes and the Bump function of the HPF:

 

[TwentyTrees]

Beautiful design, Gabriel! I really love the front panel layout. Bravo!

 

[elskardio]

Hi Andy,

Thank you for the comment.
Any progress on the new album?

Cheers

Beautiful design, Gabriel! I really love the front panel layout. Bravo!

 

[guze]

very nice

 

[TwentyTrees]

Hi Andy,

Thank you for the comment.
Any progress on the new album?

Cheers

Heh! The album’s going well thanks, if very slowly! As I always say, if a thing is worth doing, it’s worth over-doing...

If you were to offer kits of these, do you have a sense of how much you’d sell them for?

Andy

 

[dmp]

Beautiful design

 

[Joechris]

Yes, its beautiful!! I want two kits.
Hope you consider making a bax style eq with the same kind of layout..!
Best
Jo

 

[elskardio]

Thanks guys for the comments.

 

[bobbenozzo]

Really interesting! would it be possible to have the 12-18 dB/oct option?
The 18 dB/oct hi pass (like neve's) is very musical on bass, kick, and many other sources.

 

[Bonsaimaster]

I'm in for two. Been looking for this exact thing.

 

[SKJGProject]

In for two as well

 

[elskardio]

Hi Guys,

nice to see some interest in the BF-500

For 10 kits or more, I could make a small batch.

I started a list of the members who showed interest in the first post.

If you would like to buy a kit, please let me know and I'll add your name to the list.

Cheers
Gabriel

 

[amassivetree]

Looks good, I am also interested in a pair.

 

[kante1603]

Very nice indeed,well done!
May I ask for a rough kit price in case you‘d get ten or more orders (haven‘t found any yet)?
I/O is balanced I guess,may I ask how (looks like INA and DRV,but it‘s hard to see from the picture)?


Thank you in advance,


Udo.

 

[elskardio]

Very nice indeed,well done!
May I ask for a rough kit price in case you‘d get ten or more orders (haven‘t found any yet)?
I/O is balanced I guess,may I ask how (looks like INA and DRV,but it‘s hard to see from the picture)?

Hi Udo,

Yes the I/O is balanced using the INA/DRV combo.

I'll try to calculate the kit price this week 

Thanks
Gabriel

 

[bobbenozzo]

I'm in for two.

 

[Mulmany]

I'll take two.

 

[elskardio]

Hi Guys,

just to clarify, I will collect payment the first week of October before ordering everything. I'll post the details at the end of the month.

Thanks

 

[Mulmany]

Any word on this?

 

[elskardio]

Hi guys,

sorry for the delayed response...  busy with work 

5 members has shown interest in a pair of kits:

Bonsaimaster (confirmed)
SKJGProject (confirmed)
amassivetree 
bobbenozzo (confirmed)
Mulmany (confirmed)

If you're all on board, we have 10 kits and I will make it happen.

Please confirm with a reply.
Cheers