Quentin Jarrell

Yea basically, shit happens. Enclosure size and tuning effect the amount of power it can take. It's just insurance.

I don't believe I said linear spiders suck. Please find it and quote it for me if I did. I said progressive spiders are better for the application of a ported alignment. As I said before, a spider is a spring. A linear spider will have a smooth curve through its movement. Meaning it gets tighter and tight at a smooth constant rate until its stretched out similar to say an accordion. Now on a progressive spider it gets tighter nice and smooth just like the linear spider up until it hits xmax. Once it hits this point it gets exponentially tighter acting as a break, to help the driver from hitting hard mechanical limits if that makes sense. Given the fact that ported enclosure unload below tuning its good to use a progressive spider as a safety feature.

DOD. Isn't that some type of MIlitary popo

To answer your other question. It's obvious that if you can fit ported do so. The BP option is for folks who want to cram a bunch of stuff in small spaces.

A more reliable FEA program and also verified by hand calculations a more appropriate enclosure would be 3cft total tuned to 48 hertz puts the bottom f3 at 28 hertz and the top F3 at 80 hertz. This enclosure is more in line with the subwoofers thermal rating. In other words the driver will hit xmax at rms rating. ~1,800 watts. However it's response is 2 db down across the board. I did not post that enclosure at this time as I knew less educated people that do not know that WinSd can't factor in PeMax due to the fact it doesn't factor suspension. The posted enclosure would take about 2,500 watts to hit xmax. But again I knew Id get tons of flaming due to the "correct" enclosure being 2 db down.

Now of course I'm not going to test. I thought that's what the customer is for.

Specs for the 15 inch Ethos with 4th order bandpass option Re 1.5 ohms Fo 31.52 Qts .4429 Qes .4728 Qms 7 Vas 63.78 liters BL 15.48 T/M xmax 33mm Mms 362.9 grams Cms 70.26 uM/N spl 87.95 1W/1M Recommended enclosure rear volume 1.4 cubic feet front volume .86 cubic feet tuning 50.8 hertz bottom F3 ~32 hertz top F3 ~83 hertz The below graph is the regular Ethos 15 compared to the Ethos 15 with the bandpass option. The bandpass option sub will work in a normal vented alignment however output will suffer due to the suspension being ~1/3 softer. Therefor it will not be able to handle the same amount of power in a vented alignment.

Four of these left.

I like pics but all I see are two and the post reapeat itself three times?

Need to get u one of those cooling suits

For sitting on my ass 95% of the time it's obscene.

Last August I was getting readings over 200 on the tin walls with a temp gun. The operators are in air conditioned loaders. I only go in to pull samples. The warehouse is about a half a football field full of ground up and cooked fish that has been ran through a hammer mill. If you have ever sniffed a can of those fish food flakes you get the general idea.

For those of you that want a driver specifically designed for fourth order bandpass enclosures I am looking at offering this option. As long as I don't have to add mass to the moving assembly to achieve desirable frequency response it will be a free of charge option. Details later today.

You could be in a 120 degree warehouse infested with Mosquitos sniffing fishmeal dust.

The spider is a spring. A progressive spider (which has nothing to do with progressively smaller rolls) if properly designed will get exponentially stiffer past 50% cms (20% distortion, audible distortion). Linear spiders do not. When you run a subwoofer in a ported enclosure it looses its dampening exponentially. A progressive spider compensates for this.

Make sure the speakers aren't too deep before you start building.

Yea I know. I inspect bulk cargo ships in Darrow on a daily basis.

He didn't cone that driver I did. I don't have the man power to fully assemble the amount of transducers I have coming so he will at his warehouse. I will still inspect everything before I ship them out. Around the end of the second quarter I will have a Klippel QC machine set up to inspect every single transducer. I have no plans on using a linear spider. Besides risking mechanical failure in ported enclosures there are to other reasons not to use a linear spider on a subwoofer 1) a spider with a significant creep creates a more preferable warmer sound and 2) induces even 4th order distortion which gives the sense of more output.

All drivers are built and charged by Nick Wright. My spiders are nomex cotton blend with a 1.72 creep.

No, Nuway did not go out out of business they were bought by Loudspeaker Components. When you call and talk to Neil he still calls it Nuway. When you call Rafiel in Mexico the receptionist answers the phone as Nuway. When the spiders come the packaging is labeled as Nuway. Nuway builds spiders in Mexico. LCC builds bodies and edges in the US. Same owner different companies.

No. 1/2 inch.

Same principle. Just cut the baffle to fit around it.

Nuway

3 feet net tuned to 32 hertz.

Who ever built it definatly races. Good bit of camber on the front.