MOX active crossover buy - Page 22

AndrewT · 17th February 2006, 05:12 PM

Hi Bobellis,
any chance you could post the spreadsheet for the unity gain filters?

BobEllis · 17th February 2006, 05:28 PM

I'll clean it up and include the notch filter section that uses Jens' formulas in his Active Filter One manual. Really all I did was plug the formulas into a cell, referencing the various inputs in cells above.

It will be a couple days though. I am heading out for a DIY project involving plumbing, painting, electrical work and maybe cross country skiing.

JensRasmussen · 17th February 2006, 06:49 PM

Quote:

Originally posted by BobEllis
Jens,

Since you seem to have nothing better to do on a Friday night , maybe you could add a notch/boost filter like in the MOXLite. (or another small board with a pair of notches) I'm currently heading down the Cauer-Elliptic path towards very low tweeter XO frequencies.

Bob

2 EQ sections.... hmmm let me take a look at it I might have to go for a dual layer... would that be ok?

How about a powersupply? I seem to have room for a pair of LM7815/7915....let me know

\Jens

BobEllis · 17th February 2006, 10:05 PM

Wow! beggars can't be choosers, double sided and PS would be great. Thanks

harryeng · 18th February 2006, 07:24 AM

When you guys are going to produce boards, I would be interested....

I have tried active filtering with a Deqx PDC2.6 and it worked great. I sold it to build a complete Pass system, but I just know I want to go active again, with Aleph 5 for high, and Aleph X for low.

I just love the future!

Greetings, Harry

troystg · 18th February 2006, 12:48 PM

Quote:

Originally posted by harryeng
I have tried active filtering with a Deqx PDC2.6 and it worked great. I sold it..... Greetings, Harry

Sorry to be off topic but I promise to be brief.

Harry-

Where did you get it, and how much did you buy and sell it for?

JensRasmussen · 18th February 2006, 02:52 PM

Files for review:

http://www.delta-audio.com/Active_Fi...er_1.4_SCH.pdf
http://www.delta-audio.com/Active_Fi...er_1.4_TOP.pdf
http://www.delta-audio.com/Active_Fi...1.4_BOTTOM.pdf
http://www.delta-audio.com/Active_Fi..._1.4_PARTS.pdf

enjoy

\Jens

jacco vermeulen · 18th February 2006, 02:57 PM

Jens,
please stay healthy

Looks like there is room for a single to dual opamp doubledecker on the board, very nice. (i happen to have a tube of filthy decadent single opamps lying here.)

harryeng · 18th February 2006, 07:42 PM

Quote:

Originally posted by rabstg

Harry-

Where did you get it, and how much did you buy and sell it for?

Hi Rabstg, you got a PM.

Greetings, Harry

BobEllis · 19th February 2006, 05:03 PM

AndrewT - here is the spreadsheet that you requested. I've included notch and boost EQ calcs, all pass and baffle step as well.

Hope it helps - note that it won't do much good if you have different frequencies set in your MOX, and you'll need to calculate/measure the actual MOX F3 to get a direct transfer.

Bob

17th February 2006, 05:12 PM	#211
AndrewT diyAudio Member Join Date: Jul 2004 Location: Scottish Borders	Hi Bobellis, any chance you could post the spreadsheet for the unity gain filters? __________________ regards Andrew T.

18th February 2006, 02:57 PM	#218
jacco vermeulen diyAudio Member Join Date: Oct 2004 Location: At the sea front, just under Rotterdam	Jens, please stay healthy Looks like there is room for a single to dual opamp doubledecker on the board, very nice. (i happen to have a tube of filthy decadent single opamps lying here.) __________________ Looks like Sponge Bob has killed another thread.

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17th February 2006, 05:28 PM	#212
BobEllis diyAudio Member Join Date: Sep 2003 Location: Upstate NY	I'll clean it up and include the notch filter section that uses Jens' formulas in his Active Filter One manual. Really all I did was plug the formulas into a cell, referencing the various inputs in cells above. It will be a couple days though. I am heading out for a DIY project involving plumbing, painting, electrical work and maybe cross country skiing.

17th February 2006, 10:05 PM	#214
BobEllis diyAudio Member Join Date: Sep 2003 Location: Upstate NY	Wow! beggars can't be choosers, double sided and PS would be great. Thanks

18th February 2006, 07:24 AM	#215
harryeng diyAudio Member Join Date: Dec 2004 Location: Roosendaal	When you guys are going to produce boards, I would be interested.... I have tried active filtering with a Deqx PDC2.6 and it worked great. I sold it to build a complete Pass system, but I just know I want to go active again, with Aleph 5 for high, and Aleph X for low. I just love the future! Greetings, Harry

18th February 2006, 02:52 PM	#217
JensRasmussen diyAudio Member Join Date: Jul 2002 Location: Denmark - Jutland	Files for review: http://www.delta-audio.com/Active_Fi...er_1.4_SCH.pdf http://www.delta-audio.com/Active_Fi...er_1.4_TOP.pdf http://www.delta-audio.com/Active_Fi...1.4_BOTTOM.pdf http://www.delta-audio.com/Active_Fi..._1.4_PARTS.pdf enjoy \Jens

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