Built Nightshade v.3 15" - Car Audio | DiyMobileAudio.com | Car Stereo Forum

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Old 03-03-2014   #1
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Default Built Nightshade v.3 15"

I came in yesterday and built this bad boy... a customer had ONE unit on order for a bit and I got a pair of the Aluminum sleeves as samples so I am building this one and one other one this week (both with fat 8-layer coils and are single sub orders). These also don't call for any Gap ID sleeves as they use the fat coil -- so I have enough parts to make them.

-----


* Collecting the parts up.


* You can see the black coated aluminum pole sleeve in place on the pole but not Gap ID sleeve -- so the overall gap is still pretty massive. The "fat" coil fills it up nicely, though.


* Starting the rear glue joint


* Rear glue joint completed


* Prototype "XL" lead wire option. The XL spiders for the NS v.3 are EXTRA red in color. The stock spiders are a very faint reddish with smaller triple lead wires. These leads are prototypes for now -- we'll offer them later as an option for anyone.


* It was interesting to get these all in the terminal.


* Finished product


* Finished product

-----

So I hope to get it tested and dust cap on today

I probably haven't said much over here on DIYMA... but the NS v.3 features a new "gap sleeve" system that allows 45 possible gap configurations. I stock about 8 different coils that will work in these various configurations as well (both D1 and D2 versions... so 16 varieties). Needless to say it's flexible.

At some point I may offer an under-hung as well

- Jacob Fuller
- Owner, Sundown Audio
- Sundown Audio on FACEBOOK
- I DO NOT USE PMs -- Email me at [email protected]
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Old 03-03-2014   #2
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Default Re: Built Nightshade v.3 15"

I pulled the T/S spec today -- notice how low inductance is even with the massive fat coil. That is the pole sleeve in action -- and the NS v.3 also has a magnet ID ring and a pole cap ring... so triple faraday action



Yes that is right around 1/2 of the Re in terms of Le.

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Old 03-03-2014   #3
 
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Default Re: Built Nightshade v.3 15"

That thing looks beefy. Any idea of the approximate xmax and xmech? I looked 3 times, I hope it's not sitting there in the specs you showed.
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Old 03-03-2014   #4
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Default Re: Built Nightshade v.3 15"

Those are not listed in the spec.

This particular coil is relatively short at 55mm in length -- top plate is 40mm thick -- linear x-max comes out to around 25mm one-way by FEA prediction for 70% BL point. In the past my Klippel x-max has been higher than FEA thanks to the tall pole extension; so should touch close to 30mm one-way (27-30mm or so).

The "stock" coil for these is a 4-layer flat wire 80mm long. FEA predicts 32.5mm one-way from that setup; I'd expect a Klippel of 36-40mm or so for 70% BL.

X-Mech is VERY high... even with the longest coil motor limited x-mech is close to 3" in one direction.

Fun fact for SQ guys -- when the 4-layer stock coil is combined with the aluminum sleeve inductance is around ~25% of the RE value

- Jacob Fuller
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Old 03-03-2014   #5
 
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Default Re: Built Nightshade v.3 15"

Wow, that's awesome. If these become available I might have to try a pair...... IB of course lol.
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Old 03-03-2014   #6
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Default Re: Built Nightshade v.3 15"

They will definitely be available within ~2 weeks or so

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Old 03-17-2014   #7
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Default Re: Built Nightshade v.3 15"

Pulled specs on the first STOCK one from the batch we built w/ Red Spiders + XL Leads. Other than the XL lead wire this one is bone stock -- just a bit heavier MMS from the extra giant lead wires but otherwise basically a stock spec.

The stock drivers use an ~80mm long 4-layer flat coil; as opposed to the shorter 8-layer round coil posted above.

Stock gap spec is 74.5mm steel pole // 85.2mm steel gap OD... coil is ~82.5mm OD and 76.7mm ID leaving a gap of 1.35mm OD and 1.1mm ID.

I also offer a pole sleeve of 75.5mm (0.6mm gap) and an OD sleeve of 84.25mm (0.875mm gap) // basically makes the gap very similar to the Z v.2 model (tightest gap we ever offered) -- for guys looking to burp these; that will pair great with the upcoming SPL cones and spiders for a nasty high frequency setup. BL will shoot up quite a bit with those tight sleeves.


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Old 04-17-2014   #8
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Default Re: Built Nightshade v.3 15"

https://www.youtube.com/watch?v=ymG-...ature=youtu.be

NS v.3 15" in action

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Old 04-17-2014   #9
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Default Re: Built Nightshade v.3 15"

WOW that's insane.....
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Old 04-17-2014   #10
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Default Re: Built Nightshade v.3 15"

It's getting close to 5" p-p travel.

- Jacob Fuller
- Owner, Sundown Audio
- Sundown Audio on FACEBOOK
- I DO NOT USE PMs -- Email me at [email protected]
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