Charge Couple - 250TiLE.

[JBL_620]

Hello CC Guru's,,
I am planning and wanting to CC the crossover and have a quick question wrt the attached schematic. I understand from reading the threads here that I need to double the value of the capacitors then add one identical to make pairs.

I need clarification on whether I need to do this on ALL the capacitors - meaning including the bypass ones like 0.01uF and 0.005uF or just the higher value ones?

Your help is much appreciated.

[Allanvh5150]

Hi, Generally you would not worry about installing the bypass caps at all. Some however, do. If you choose to do so, just use the bypass caps as they are now. I.E. bypass each group of capacitors.

Allan.

[JBL_620]

Hi, Generally you would not worry about installing the bypass caps at all. Some however, do. If you choose to do so, just use the bypass caps as they are now. I.E. bypass each group of capacitors.

Allan.

Thanks much Allan for the advice. So I went ahead and modified the diagrams as shown below with the bypass caps removed from the circuits.

Does everything look correct? Any other suggestions before I start shopping for the parts?

Thanks.

[Amnes]

Looks good to me. Might do it in mine some time too.

[JBL_620]

Looks good to me. Might do it in mine some time too.

Thank you Amnes for the confirmation of the modified circuits. Come on and lets do it.
I'll be biamping the speakers as well.

[Hey19]

Thank you Amnes for the confirmation of the modified circuits. Come on and lets do it.
I'll be biamping the speakers as well.

will you be using?

[Uncle Paul]

Thank you Amnes for the confirmation of the modified circuits. Come on and lets do it.
I'll be biamping the speakers as well.

Are you using an active crossover? If so you can eliminate much of the larger and more expensive components. Also, others with much experience have recommended using Solen caps without the need for bypass caps. There is a really, really good build thread here by 4313b somewhere, though for the version that uses bars to select padding. Still, much to be learned there due to the excellent construction technique.

[JBL_620]

Need help on finding the right values for these parts.

Seems they don't make the inductors in these exact values, What equivalent are you using to get these values:

0.03mH
0.18mH
0.5mH

Same for the 3.9 Ohm 10W resistor, can I use a 4 ohm resistor, or four 1 ohm resistors in series? With 5% tolerance, I think this should work.

Your advice and guidance is much appreciated. Thanks.

[Robh3606]

When I built my Jubilees I just purchased a coil size a bit larger and then just wound off some coils. For the resistor you can use 4 ohms

Rob

[JBL_620]

Thanks Robh3606 for your link to the CC Jubilee. I have read through them and good job on the speaker cloning. Do you have own the pair?


So here's the BOM with price for one speaker. Since I am going to be using an active XO, I will likely not order the parts for the LF portion (or maybe I should in case at the end of the day I will just stick to the CC network only - without the biamp. I am not sure yet).




Obviously, the shown price doesn't include the required misc parts like (this is what I can thing of at the moment):

• 9V battery and connectors
• PCB's (I will stack the PCB's similar to how Robh3606 did on his CC Juliee)
• Stand-offs, washers and screws
• 2-position toggle switches
• speaker terminals
• etc...

Do these prices seem about right in today's market? These are all from the Parts Express.

Any concerns of the listed brands or specs?

Any suggestion or recommendation on the PCB's? Use MDF cardboard from Home Depot?
Thanks again.