What would you build? - Page 3

croat47 · 21st September 2006, 11:51 PM

Thanks! I'll post pics when it is fit and finished.

I will try the sock. I did play around a bit with the crossover point. The higher I cross....the more geese I hear. Is that too low a polyfill volume or driver related...or just a bad build?

Is it snowing up there yet? Skied Whistler once...rain at the bottom, but soooo nice up top.

Cal Weldon · 21st September 2006, 11:58 PM

The sock will give you an idea if the port is the problem. And yes the higher XO you go, the less likely it is to sound good. Honk honk!

We are still at the end of summer. Our daytime highs are 60 - 70F. Whistler is 2 hours from here. They might be getting the occasional flake or two up top.

croat47 · 22nd September 2006, 12:04 AM

What causes the honk as the xover moves up? There seem to be drivers that can to the 180Hz range if the palte amps let you cross that high...or is that a marketing feature?

Again, thank you for the help!

Regards,
Aaron

Cal Weldon · 22nd September 2006, 01:36 AM

Well, I guess I'm not a big fan of ported speakers so I told you to stick a sock in it.

I won't try and get technical but fair to say that the lower you cut off a long throw driver, the better it will sound. They aren't meant to be a mid bass.

croat47 · 22nd September 2006, 11:56 AM

Cal...I had considered closing the port. But, WinISD showed a higher F3 and long roll off for the response for the same Vb. I expected that, but am not sure which trade off I want to make. WinISD also puts the driver right in the middle of sealed/vented as far as it's suggestion of where to go, so it's a matter of what I feel works best.

On a budget (free driver), and playing the cards I'm dealt, you know? I will play around more this evening I hope...port tuning (including socks), xover, and levels.

That being said: I've seen your positive impressions of the TB W6-1139. In looking for a small, concealable sub for my living room (requires higher SAF than this one), I was wondering if two of these ala edjosh23 would be a good bet. I would prefer sealed as well for transient response, but you seemed to get good thump from 1 TB and a PR. Again...looking at these from a budget and SAF point of view to fill in below 70Hz.

A bit off the original line...but since you were kind enough to help out

.

Regards,
Aaron

Cal Weldon · 22nd September 2006, 04:22 PM

Hi Aaron,

I would consider the W8-740C 8" woofer in lieu of the W6-1139. The W6 is nice but it lacks a bit in depth and won't fill a living room. The W8 is a little powerhouse.

http://www.partsexpress.com/pe/pshow...TOKEN=85600791

The W6 with one 8" PR is in a 100 ft^2 room. The W8 with two 8" PR's is in a 250 ft^2 room.

croat47 · 22nd September 2006, 04:44 PM

Cal...thanks again. For ~$50 plus a couple of PR's, that is not too bad. What Vb did you use? I found 8" PR's on Parts Express...those the ones you used? I have another one of the drivers I am currently using...maybe a PR arrangement would be the better way to go for the next attempt.

Why PR over ported? Don't they have similar responses? Or do you get better transient response from the "sealed" nature of the PR?

Regards,
Aaron

Cal Weldon · 22nd September 2006, 04:57 PM

Aaron,

IIRC the box is about 1.3 ft^3. The drones I used are the pioneer 8" modified.

Purely subjective that I'm not a fan of ported, but I seem to like the PR system. Go figure.

21st September 2006, 11:58 PM	#22
Cal Weldon Speakerholic diyAudio Moderator Join Date: Jan 2004 Location: British Columbia	The sock will give you an idea if the port is the problem. And yes the higher XO you go, the less likely it is to sound good. Honk honk! We are still at the end of summer. Our daytime highs are 60 - 70F. Whistler is 2 hours from here. They might be getting the occasional flake or two up top. __________________ Next stop: Margaritaville Some of Cal's stuff \| Cal Weldon Consulting

22nd September 2006, 01:36 AM	#24
Cal Weldon Speakerholic diyAudio Moderator Join Date: Jan 2004 Location: British Columbia	Well, I guess I'm not a big fan of ported speakers so I told you to stick a sock in it. I won't try and get technical but fair to say that the lower you cut off a long throw driver, the better it will sound. They aren't meant to be a mid bass. __________________ Next stop: Margaritaville Some of Cal's stuff \| Cal Weldon Consulting

22nd September 2006, 04:22 PM	#26
Cal Weldon Speakerholic diyAudio Moderator Join Date: Jan 2004 Location: British Columbia	Hi Aaron, I would consider the W8-740C 8" woofer in lieu of the W6-1139. The W6 is nice but it lacks a bit in depth and won't fill a living room. The W8 is a little powerhouse. http://www.partsexpress.com/pe/pshow...TOKEN=85600791 The W6 with one 8" PR is in a 100 ft^2 room. The W8 with two 8" PR's is in a 250 ft^2 room. __________________ Next stop: Margaritaville Some of Cal's stuff \| Cal Weldon Consulting

22nd September 2006, 04:57 PM	#28
Cal Weldon Speakerholic diyAudio Moderator Join Date: Jan 2004 Location: British Columbia	Aaron, IIRC the box is about 1.3 ft^3. The drones I used are the pioneer 8" modified. Purely subjective that I'm not a fan of ported, but I seem to like the PR system. Go figure. __________________ Next stop: Margaritaville Some of Cal's stuff \| Cal Weldon Consulting

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21st September 2006, 11:51 PM	#21
croat47 diyAudio Member Join Date: May 2005 Location: Eastern Shore, Maryland	Thanks! I'll post pics when it is fit and finished. I will try the sock. I did play around a bit with the crossover point. The higher I cross....the more geese I hear. Is that too low a polyfill volume or driver related...or just a bad build? Is it snowing up there yet? Skied Whistler once...rain at the bottom, but soooo nice up top.

22nd September 2006, 12:04 AM	#23
croat47 diyAudio Member Join Date: May 2005 Location: Eastern Shore, Maryland	What causes the honk as the xover moves up? There seem to be drivers that can to the 180Hz range if the palte amps let you cross that high...or is that a marketing feature? Again, thank you for the help! Regards, Aaron

22nd September 2006, 11:56 AM	#25
croat47 diyAudio Member Join Date: May 2005 Location: Eastern Shore, Maryland	Cal...I had considered closing the port. But, WinISD showed a higher F3 and long roll off for the response for the same Vb. I expected that, but am not sure which trade off I want to make. WinISD also puts the driver right in the middle of sealed/vented as far as it's suggestion of where to go, so it's a matter of what I feel works best. On a budget (free driver), and playing the cards I'm dealt, you know? I will play around more this evening I hope...port tuning (including socks), xover, and levels. That being said: I've seen your positive impressions of the TB W6-1139. In looking for a small, concealable sub for my living room (requires higher SAF than this one), I was wondering if two of these ala edjosh23 would be a good bet. I would prefer sealed as well for transient response, but you seemed to get good thump from 1 TB and a PR. Again...looking at these from a budget and SAF point of view to fill in below 70Hz. A bit off the original line...but since you were kind enough to help out . Regards, Aaron

22nd September 2006, 04:44 PM	#27
croat47 diyAudio Member Join Date: May 2005 Location: Eastern Shore, Maryland	Cal...thanks again. For ~$50 plus a couple of PR's, that is not too bad. What Vb did you use? I found 8" PR's on Parts Express...those the ones you used? I have another one of the drivers I am currently using...maybe a PR arrangement would be the better way to go for the next attempt. Why PR over ported? Don't they have similar responses? Or do you get better transient response from the "sealed" nature of the PR? Regards, Aaron

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