| Cal Weldon |
I have heard good reviews. All except the efficiency/sensitivity.
How have other used this unit and in what volume of a box?
6.5"
Here is what I am trying. 600 cubic inches only
Boxes
Comments?
Cal |
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| jjdche |
I haven't used it, but I hope to one day.
Does that help? |
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| Cal Weldon |
Ya that's great jjdche, What are you a cheerleader? :D
I tell you what. I'll let you know how they sound and if they are worth the effort. If only they'd get here tommorow, I could take them to the DIY in Vancouver (Surrey actually) on Saturday. Fingers are crossed.
Ya right, Canada Post.
Cheers |
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| BassAwdyO |
| Looks about like the Tangband version of Extremis6. It doesnt seem to go near as high frequency wise though, quite a bit cheaper on the other hand. I havent heard it, but 6.5" isnt much of a sub if you ask me. I'd call it a woofer or mid-woofer. |
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| DC Dave |
| Do a search on the Parts Express Tech Talk forum. There is a good amount of info on that driver. 600 in should get you into the mid 30s. The hardest part of the design is dealing with the port length in such a small box. Slot port could be the way to go. |
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| Cal Weldon |
| quote: | Originally posted by BassAwdyO
I'd call it a woofer or mid-woofer. |
Bless you BassAwdyO. I'm almosy scared to call it just a woofer these days, what with all of this "sub" talk going on.
With an FR only to 800Hz and a Fs of 35 Hz, I think it's safe to call it a woofer.
| quote: | Originally posted by DC Dave
The hardest part of the design is dealing with the port length in such a small box. Slot port could be the way to go. |
I am going to try it sealed in the little pyramid enclosures first before I decide if it needs porting. I have an idea about creating a mini scoop at the bottom.
Cal |
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| jjdche |
| I'm planning on putting it in a small portable sytem. I tried it with a Dayton DVC 8" but it just wasn't small enough. |
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| DC Dave |
| I'm working on a design using a ported enclosure. The exterior dimensions are about 12" cubed. Interior is about .46ft tuned to 37hz, -3db at 33 hz. It uses a slot port. When I get done with the drawings I'll post some more detail. |
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| Cal Weldon |
So they did arrive on Friday.
I got them assembled and listened to them for about 1/2 hour before it was bedtime. They turned out different than I thought 'cause the amp and driver didn't fit like I wanted, so I turned the cabinet on it's side to mount the stuff and added some triangles at the bottom.
They sound OK. They need work. There is no shortage of bass. They farted a little. Here's a link to the event.
http://www.diyaudio.com/forums/show...68&pagenumber=3
Cal |
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| Cal Weldon |
After a few tweaks, this is starting to sound better. If anyone is planning to use this woof, it seems like a good deal and extends low enough for most music.
I give it a 4 out of 5.
Cal |
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| Jason Watts |
| I bought 4 of the Tang Band 4 inch subs just to play with. Turns out when I measured the T/S parameters they were way off from the manufactures specs. The Fs measured 62 Hz manufacture said 55Hz. You may want to check them. |
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| moving_electron |
I am using the 6 1/2" to build 2 ported "subs" that are 24"hx12wx9"d.
The idea is to use them as the back 2 legs of a computer desk. The "main" speakers are sealed 3" TB W3871S on either side of the desk.
One of the motives was to save space in a space constrained room and go with 2 so that the stereo imaging would be maintained.
The full plan is to go to 3 speakers so that via a couple of switches you can use one of the desk speakers and one on the other side of the room for TV viewing. We will put a 3rd sub there so we essentially have 3 "2 way" speakers we can use. Should help the imaging since I crossed them at 150Hz to be able to get elevated volume out of the W3871S.
Hopefully I can close up the "subs" and try then out in a week or so and see how the experiment turns out.
Another use for 6 1/2s is in a 8" high box wide enought to support a TV. I have done this with a pair of Dayton 6 1/2s and it was quite a good addition. We never ask for so much base from it that it is a vibration problem and flanked by a pair of TB W3871S it is wuite an improvent in that room. |
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| moving_electron |
A third idea was to build a pair of boxes for the 6 1/2" "subwoofers" large enough to use as a stands for the 3" "mains" that would go on each side of the desktop. The sub box would be about 10" tall above the desktop in that senario to put the 3" sealed mains at earlevel.
I would then fit the rest of the box and the port tube down and through the desktop. This would produce a "2-way" that would have pretty deep base for music but not take up to much desk space. This was my personal favorite design idea since we were making the desktop anyway.
Alas my son did not go for it as he wanted all the desk space he can get. So the 3" mains are being mounted on wall brackets at ear level and I went with the "back leg" subwoofer idea.
The customer is always right........ |
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| coolkhoa |
Just FYI for this woofer PE recommends either a 0.15 cu. ft. sealed box (with an F3 of 70 Hz :D) or a 0.35 vented (F3 of 43 Hz). I've been eyeing that 6-1/2" since it came out, and I too want to pair it with that 70W plate amp from PE. I wonder what driver would be suitable for the 25W version??? ;)
Please keep us posted. :) |
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| Cal Weldon |
Things have changed dramatically since I last visited this thread.
I am nearing completion on this.
On the back:
TB 6.5
8" PR
Plate amp
On the front
MCM 7" mid bass in cabinet
and
Coral 4" alnico with planet10 dave alterations
Foster inverted dome
both OB
XO at 100, 1,000, 10,000 all 6dB
Will post pics when the grilles are finished
Cal |
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| Cal Weldon |
| OK, here is the back |
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| Cal Weldon |
| and front, sans grille |
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| BAM |
| Surely you weren't going to post all those pictures and not give us some idea of how they sound, were you? |
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| Cal Weldon |
Bam,
The reason I can't tell you at this point is that the Foster 8 ohm midrange is temporary. The actual unit will look much the same but will be a Coral 16 ohm. Hence the XO points aren't right and I can't really tell you how they sound until they arrive. planet10 dave is looking after them for me.
I can tell you the bass is just fine. Deep and plenty of it. :D
Cal |
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| BAM |
| Another question: Is that PR one of the Pioneer 8" PRs that Parts Express and Radio Shack used to have? If so, I also have three of them that are sitting around wondering what I'm going to do with them. You can't hang any mass from them unless you put an extra foam surround on the back, which is what I think will eventually happen with mine. |
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| Cal Weldon |
Yes they are the Pioneer ones.
While you can't hang mass, you can paint the back with white glue or Puzzle Kote. Just be careful not to overdo it because the poor thing will start to sag. Even with only minor mods, they sound pretty good. Better than I expected.
Cal |
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| Cal Weldon |
Finally got the Coral mids in the speakers and do sound great. Never heard Jimmy Buffett sound so good. Oh and since this thread started, I have built two more sets. It's about time I received those Corals Dave. ;)
Cal |
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