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Short Line Array (line source) build
Short Line Array (line source) build
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Old 17th March 2014, 05:59 PM   #101
zobsky is offline zobsky  India
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Quote:
Originally Posted by perceval View Post
Yep, that was my understanding... low Qts means weak bass.... but this site I am looking at swears it is a great low freq driver to be put in a small enclosure.
Low Qts means weak bass only in open baffle / infinite baffle / sealed enclosures. You can increase the Q somewhat with a series resistor.

Not saying that you should, . just putting it out there.
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Old 17th March 2014, 08:28 PM   #102
norman bates is offline norman bates  United States
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I agree.

Low qts is great for detail and transients, assuming you can live with where the bass falls off.

And a resistor certainly can help add some bass (try a 3ohm).

I feel the neo magnet acts like alnico, sort of a built in shorting ring.

Is it worth it ?

I know I'd pay more for a copper cap on the pole piece or a shorting ring (even underhung) on any driver but a subwoofer.

But I wouldn't pay twice as much for a neo vs. a ferite.

Great bass from a 3" ?

lol, I have a bridge I'd like to sell you.

Norman
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Old 18th March 2014, 01:38 AM   #103
perceval is offline perceval  Taiwan
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Hi Norman,

I feel there is some mixup.

The ferrite (paper cone) is the more expensive at $20, the "neo" (if it is a neo, fiberglass cone) is at $3.

The low qts with "great" bass is from a 10inch I would add to the array.
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Old 18th March 2014, 01:49 AM   #104
perceval is offline perceval  Taiwan
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This is a picture of inside the $3 neo driver.
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Old 18th March 2014, 04:20 AM   #105
perceval is offline perceval  Taiwan
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Ok, if going to the $3 driver, then I will work hard to get 25-driver towers a reality.

Need to get them spouse approved, as she already thinks I own much of the space in the house! Music, surfing, drumming,... all stuff that takes a lot of space! Of the three, she enjoys surfing too, so that one is easy. The other two take more work...

If I follow Overkill's designs and make a shallow enclosure (say 3.5" / 9cm deep) and hung it on the wall, I think it would have the best chance at reaching high approval rates.

That would mean that I do not listen to all design enclosure softwares are telling!

Been also considering a 16-driver tower, combined with a 10" base.
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Old 18th March 2014, 07:18 PM   #106
wesayso is offline wesayso  Netherlands
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So the line array seems like the ideal solution, right? Look at how much floor space it really uses
Mine fit on a A4 page... (excluding the feet)
Click the image to open in full size.
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Old 19th March 2014, 01:27 AM   #107
perceval is offline perceval  Taiwan
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I know!

I've been following your two towers as well.

They are gorgeous!

I won't go to extreme length like you (especially since my drivers will be "good-enough" at best!), but hopefully, I'll have something interesting as well.

Click the image to open in full size.
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Old 19th March 2014, 07:31 AM   #108
Colin is offline Colin  United Kingdom
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Can you get any kind of spec for the cheaper driver? If the xmax is less, even having more of them could result in less output and/or LF making it more difficult to get the sub to match.

Despite the trend for narrow cabinets, wider, shallower cabinets can work well if you keep the same volume behind the driver. They work especially well up against a wall as Overkill says, at least in my experience.
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Old 19th March 2014, 11:20 AM   #109
xrk971 is online now xrk971  United States
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Short Line Array (line source) build
+1 on getting parameters for the $3 budget driver. I made my own TS parameter tester using built in function in REW software and a couple of 3.5mm stereo jack cables, a 100 ohm resistor and some alligator clips. Works very well and matches factory measurement of known woofers/drivers. Even at $3 that is $150 for 50 of them and the labor involved in putting them in a cabinet is not trivial. Having the parameters will allow you to size the cabinet properly and not frustrate you at the outcome by ensuring a successful predictable outcome. There are alignments that are more insensitive to driver Qts: sealed tapered TL like the Nautaloss, the Cornu, and OB. For a very small sealed cabinet the Qts can make a difference in ensuring enough cone movement control and allowing enough bass extension.
The home TS parameter measuring setup really is easy and I highly recommend all DIYers serious about building speakers to have one exactly for this reason.
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Old 19th March 2014, 02:35 PM   #110
perceval is offline perceval  Taiwan
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Zero specs available from the seller. Selling them as is.

I'll have to fire up REW to check that. I didn't know it was there.

On another angle, I just learned that VIFA drivers are made just up north from me. Tomorrow I will try to contact someone there and see if they would ship to me, or at least find a local distributor. If that could make the TC9 available to me, that'd be great!
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