Cases for NS1000 Cross-Overs

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ChrisOH1
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Cases for NS1000 Cross-Overs

Post by ChrisOH1 » Tue Dec 04, 2018 4:02 pm

Hi,

I'm in the process of commissioning a pair of external cross-overs for my NS1000s. A large part of the budget needs to be spent on components that are being specified so I'm left with little to fund enclosures and wonder what people might suggest or preferably where to buy please. I understand non-ferrous is preferable and the boxes need to be A3 sized to accommodate everything properly.

Thanks in advance for any advice

Regards

Chris

sq225917
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Re: Cases for NS1000 Cross-Overs

Post by sq225917 » Tue Dec 04, 2018 7:06 pm

I defer to the knowledgeable member for Sheffield central.
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YNWaN
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Re: Cases for NS1000 Cross-Overs

Post by YNWaN » Tue Dec 04, 2018 7:21 pm

Do they really have to be A3 in size Chis? Cos that’s pretty blooming big! Are you sure you don’t mean A4 - this is about the size of mine?

You are right that non-metallic is best but an aluminium case wouldn’t be the end of the world if the inductors are not placed too close to it (lots of speaker manufacturers don’t even pay attention to this aspect).

Otherwise I would look at a plywood or MDF enclosure. You could make your own (if you have the gear/skills/time/compulsion) or eBay possibly (I’ll have a look). I’ve seen repurposed wooden wine boxes used, for example.

Personally, I made my own cases but you need quite a lot of specialist gear to do the cases I made. I am toying with a new design that is rather like an inverted V in layout but this is still in the concept stages and I have lots to do before this.
Mark

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Re: Cases for NS1000 Cross-Overs

Post by YNWaN » Tue Dec 04, 2018 7:26 pm

Also, please tell me all about these crossovers you are having built - component choice, circuit etc. - everything please :).
Mark

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Re: Cases for NS1000 Cross-Overs

Post by YNWaN » Tue Dec 04, 2018 7:51 pm

Sorry to post yet again but I’ve had a quick on eBay and there appear to be loads of of wooden box options.
Mark

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Re: Cases for NS1000 Cross-Overs

Post by flatpopely » Wed Dec 05, 2018 7:45 pm

I've got two unpainted NAIM cases if they would be any good?
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ChrisOH1
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Re: Cases for NS1000 Cross-Overs

Post by ChrisOH1 » Thu Dec 06, 2018 10:30 am

Hi Gents,
Sorry for the slow response, have been sidetracked.

Wine boxes are a good shout, I had been looking at them with a view to perhaps getting them sprayed.

Would love to get something to match my Voyager power amps or Paradise phono stage in Aluminium or perspex so am on the hunt. What size are the Naim cases please, they might be a possibility?

I am hoping to have RFC do the work who have made a detailed proposal which involved making what would no doubt be wonderful cases to house the crossovers, but I can’t find the cash required.

Proposed for components is a mixture of Claritycap and Mundorf caps, Vishay resistors, Permite / Jantzen inductors, using high purity tinned copper rail in large cases to allow them to breath.

Regards

Chris

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Re: Cases for NS1000 Cross-Overs

Post by YNWaN » Thu Dec 06, 2018 7:31 pm

Acrylic cases will be difficult to source ready made, but there are people on-line who will make them. You don’t actually need a whole case as such - just a platform on which to mount everything. It looks neat if you have a second layer over this platform through which the legs of the components pass. In my own case this second layer is cut such that the components are cradled in recesses cut for them (though this isn’t strictly necessary).

The crossover you mention sounds very much like the ones I built - they also use ClarityCap ESA and Mundorf capacitors combined with Jantzen inductors. Jolly good they sound too :).
Mark

reffc
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Re: Cases for NS1000 Cross-Overs

Post by reffc » Wed Jan 16, 2019 8:22 pm

I'll be starting on these for Chris presently. I've looked at the design and made a few minor tweaks such as specifying a lower DCR inductor for the bass section to up DF. I've checked the values and will mess around in simulation when I can get some driver measurements but have a few ideas about improving phase in the LF to Mids. Like you Mark, I've plumped for inexpensive but reasonable quality polys in the Bass but up-spec'd the HF and mid sections.

Inductors used are pretty similar to yours with permite cores (bass uses permite with discs which I was hoping to avoid but the values needed were only available in P core + discs). The discs just add to the amount of core volume that can be saturated but it's no-where near as audible in the bass as higher up where air cores are used instead.

The boxes are pretty large but I'm following a discrete topology designed to keep noise floor as low as possible and the additional space allows maximum spacing flexibility for the inductors. I could just about squeeze everything into a box roughly half the area but the components would be pretty jammed tight.

ChrisOH1
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Re: Cases for NS1000 Cross-Overs

Post by ChrisOH1 » Thu Jan 17, 2019 1:46 pm

Hi Paul,

I'm obviously really looking forward to getting hold of these in your custom made cases. I got there in the end by pointing out to the powers that be that they would be on display forever, as i have no plans to move on from the NS1000s any time soon. This and having made some creative financial arguments means that I'm all in and looking forward to seeing them progress and hearing the effect they have in the not too distant future. Pleasure dealing with you and look forward to meeting you in a few weeks when i drop the speakers off.

Regards

Chris

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