Hobbs NX-Studio Build

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Tyson

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Re: Hobbs NX-Studio Build
« Reply #300 on: 29 Jul 2022, 05:00 pm »
If anyone is interested in trying out Vcap ODAMs for yourself, I have some for sale in the Accessories section here on AC.

Hobbsmeerkat

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Re: Hobbs NX-Studio Build
« Reply #301 on: 3 Aug 2022, 03:31 am »
Crossovers are assembled!


Next steps is to have some MDF boards cut so i can mount the crossovers to them like i did with the Miflex crossovers.
Then I'll finish wiring them up and get them burning in  :thumb:

Only thing I don't like about the Duelund JDM caps is that they have the leads on the same side and the only way to avoid shorting the leads on the metal cylinder was to cover part of the VCap in electrical tape.

The smaller VCap bypass on the woofer actually has a clear plastic film over it, but the Sonicap isn't made of metal.

Kaiju2189

Re: Hobbs NX-Studio Build
« Reply #302 on: 3 Aug 2022, 11:11 am »
Hobbs. What’s a best practice for choosing values on bypass caps.

I have always just used 0.1 values in the past. I’m see you chose 0.01 on the tweeter and 0.1 for the woofer. I’m curious how you chose those values.

Thanks for sharing some knowledge.

Hobbsmeerkat

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Re: Hobbs NX-Studio Build
« Reply #303 on: 3 Aug 2022, 12:35 pm »
Hobbs. What’s a best practice for choosing values on bypass caps.

I have always just used 0.1 values in the past. I’m see you chose 0.01 on the tweeter and 0.1 for the woofer. I’m curious how you chose those values.

Thanks for sharing some knowledge.

Normally i stick to 0.1uF, but in this case, the JDM silver foil caps only come in 0.01uF 0.022uF & 0.047uF. Silver is also known for being "bright" if overused, so keeping it small is a good option in this case. Though, if paired with a "darker" sounding cap like the Jupiter copper caps, it can help to balance out the tone, especially up top.

If i had stuck to copper foil bypass caps, I would have used 0.1uF since it's tonal influence tends to be more smooth/lush.

With large caps (30uF+) most often used in the mid or bass circuit, you want to stick to values that are 1/100th of the main cap to avoid phase shift in audible ranges. So if you have a 75uF cap in the mids a 0.68uF bypass is about as big as you want to go.
A 100uF cap can be bypassed with up to 1uF.

mkrawcz

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Re: Hobbs NX-Studio Build
« Reply #304 on: 3 Aug 2022, 12:48 pm »
Crossovers are assembled!


Next steps is to have some MDF boards cut so i can mount the crossovers to them like i did with the Miflex crossovers.
Then I'll finish wiring them up and get them burning in  :thumb:

Only thing I don't like about the Duelund JDM caps is that they have the leads on the same side and the only way to avoid shorting the leads on the metal cylinder was to cover part of the VCap in electrical tape.

The smaller VCap bypass on the woofer actually has a clear plastic film over it, but the Sonicap isn't made of metal.
Nice work on that. Those caps will need at least 100hrs to open up enough to be listenable.

Hobbsmeerkat

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Re: Hobbs NX-Studio Build
« Reply #305 on: 3 Aug 2022, 01:58 pm »
I plan to give them at least 400 hrs, but ill be sure to check in on their progress from start to finish.  :thumb:

wgraft5

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Re: Hobbs NX-Studio Build
« Reply #306 on: 3 Aug 2022, 03:28 pm »
Thats nice, i like that.

I have Sonicaps with Miflex bypass. I was thinking maybe add 1 ODM Vcap and 1 Duelund JDM  to my Miflex for a blend.

I looked for those resistors but I think they are sold out and they were discontinued.

Anyway, thanks and keep us updated.

Hobbsmeerkat

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Re: Hobbs NX-Studio Build
« Reply #307 on: 3 Aug 2022, 03:46 pm »
I found the resistors on partsconnexion. they are discontinued, but  they were still available at a decent price. They do have a newer version which is black, but im not sure what the differences are, plus they were 2x the price, even on sale.

mkrawcz

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Re: Hobbs NX-Studio Build
« Reply #308 on: 3 Aug 2022, 06:28 pm »
BTW Hobbs, I can’t tell from the picture, but make sure the leads of the bypass cap are not touching the case of the vcap because it’s conductive.

Hobbsmeerkat

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Re: Hobbs NX-Studio Build
« Reply #309 on: 3 Aug 2022, 06:30 pm »
BTW Hobbs, I can’t tell from the picture, but make sure the leads of the bypass cap are not touching the case of the vcap because it’s conductive.

I mentioned it in the post. I used electrical tape to separate the V-caps from the bypass.