BBBIB Bigger Badder BIB Speaker - Page 7

pblossom · 13th October 2006, 12:33 AM

Martin and GM,

Thanks, that clears it up.

Regards,
Paul

Variac · 13th October 2006, 12:51 AM

Oh Boy, we have Martin involved now!! Thanks guys,

I think that this project might be quite popular, also we'll get some other big varients such as Paul's.

There are tons of concentric pro 12" driver/horn tweeters out there. The right combo could be very impressive.

Even the wrong combo could be some very impressive party speakers!

Scottmoose · 13th October 2006, 06:53 AM

Thaks for the clarification Martin & Greg -re-reading, I was about as clear as a Pacific fog at midnight wasn't I? Sorry about that, Paul.

Variac · 16th October 2006, 06:40 AM

I will try to post a better one later after I get feedback on this.

what do you guys think? Are the width to depth proportions right? I think I used 1.414.

Do we need more damping on other parts?

Scottmoose · 16th October 2006, 12:58 PM

Spot on, as far as I can see, assuming 3/4in material. You usually need to stuff the point above the driver as well as line the internal baffle. I'd suggest some bracing too as these are big panels.

Variac · 16th October 2006, 06:26 PM

Since there are no big corrections, maybe in your spare time

you could do a response plot of this size..?

Those little squares in the section at the end of the flare are 2x2's to help brace a little. Admittedly at this size it would be best to have the whole thing thicker, but expensive. Punkr could add another layer on the sides later if he loves them, to make them even better- and REALLY heavy! I am looking into using the scraps to at least add some thickness at the very top.

So damping on both sides of the internal baffle/divider? How thick? What material?

Scottmoose · 16th October 2006, 06:28 PM

Just the front initially. About 1/4in thickness of BAF wadding material should do wonders. I'll run a sim shortly.

BAM · 16th October 2006, 11:11 PM

I'd be inclined to take a look at the coaxial offerings by B&C Speakers. You can find them at Parts Express. B&C Speakers is a popular brand among the pro audio manufacturers particularly. They even have a 6.5" midrange driver which looks like the older PHL models.

punkrokr1701 · 16th October 2006, 11:16 PM

B&C yes they are nice and prefered for pro audio but with a price. $309 for a 12"coaxal driver? Sorry to bust your chops but this is an econo project.

moray james · 17th October 2006, 12:38 AM

Beyma also have some nice 12 inch coax drivers. These I believe are less expensive than the B&C units but will still be more expensive than the Eminence LAT. Remember though that the LAT is a 12 inch wide range with a whizzer cone as opposed to a Tannoy style dual concentric two way with a comp mid/tweeter. More money yes but a lot more speaker and in the long run not all that much more money. At least people reading should be aware of possible options. With what you could sell a set of BIB's with LAT's in them you could afford the B&C or Beyma drivers for round two. Have a look at the Beyma 12XC30 which ought to work well in a BIB. Probably double the money of a LAT but more than twice the driver and don't forget LAT's will need a tweeter to help out the top end so there is additional cost/time to consider there as well. Regards Moray James.

13th October 2006, 12:51 AM	#62
Variac diyAudio Editor Join Date: Dec 2001 Location: San Francisco, USA	Oh Boy, we have Martin involved now!! Thanks guys, I think that this project might be quite popular, also we'll get some other big varients such as Paul's. There are tons of concentric pro 12" driver/horn tweeters out there. The right combo could be very impressive. Even the wrong combo could be some very impressive party speakers! __________________ 2013 Burning Amp Festival announced: Sunday, October 6th in S.F. We need Volunteers & sign-up's for what you're bringing!

16th October 2006, 06:26 PM	#66
Variac diyAudio Editor Join Date: Dec 2001 Location: San Francisco, USA	Since there are no big corrections, maybe in your spare time you could do a response plot of this size..? Those little squares in the section at the end of the flare are 2x2's to help brace a little. Admittedly at this size it would be best to have the whole thing thicker, but expensive. Punkr could add another layer on the sides later if he loves them, to make them even better- and REALLY heavy! I am looking into using the scraps to at least add some thickness at the very top. So damping on both sides of the internal baffle/divider? How thick? What material? __________________ 2013 Burning Amp Festival announced: Sunday, October 6th in S.F. We need Volunteers & sign-up's for what you're bringing!

17th October 2006, 12:38 AM	#70
moray james diyAudio Member Join Date: Aug 2003 Location: Calgary on the Bow	not sure but... Beyma also have some nice 12 inch coax drivers. These I believe are less expensive than the B&C units but will still be more expensive than the Eminence LAT. Remember though that the LAT is a 12 inch wide range with a whizzer cone as opposed to a Tannoy style dual concentric two way with a comp mid/tweeter. More money yes but a lot more speaker and in the long run not all that much more money. At least people reading should be aware of possible options. With what you could sell a set of BIB's with LAT's in them you could afford the B&C or Beyma drivers for round two. Have a look at the Beyma 12XC30 which ought to work well in a BIB. Probably double the money of a LAT but more than twice the driver and don't forget LAT's will need a tweeter to help out the top end so there is additional cost/time to consider there as well. Regards Moray James. __________________ moray james

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13th October 2006, 12:33 AM	#61
pblossom diyAudio Member Join Date: Jan 2004 Location: Michigan	Martin and GM, Thanks, that clears it up. Regards, Paul

13th October 2006, 06:53 AM	#63
Scottmoose diyAudio Member Join Date: Mar 2005 Location: UK	Thaks for the clarification Martin & Greg -re-reading, I was about as clear as a Pacific fog at midnight wasn't I? Sorry about that, Paul.

16th October 2006, 12:58 PM	#65
Scottmoose diyAudio Member Join Date: Mar 2005 Location: UK	Spot on, as far as I can see, assuming 3/4in material. You usually need to stuff the point above the driver as well as line the internal baffle. I'd suggest some bracing too as these are big panels.

16th October 2006, 06:28 PM	#67
Scottmoose diyAudio Member Join Date: Mar 2005 Location: UK	Just the front initially. About 1/4in thickness of BAF wadding material should do wonders. I'll run a sim shortly.

16th October 2006, 11:11 PM	#68
BAM diyAudio Member Join Date: Sep 2001 Location: Carmel, IN; West Lafayette, IN	I'd be inclined to take a look at the coaxial offerings by B&C Speakers. You can find them at Parts Express. B&C Speakers is a popular brand among the pro audio manufacturers particularly. They even have a 6.5" midrange driver which looks like the older PHL models.

16th October 2006, 11:16 PM	#69
punkrokr1701 diyAudio Member Join Date: Aug 2006	B&C yes they are nice and prefered for pro audio but with a price. $309 for a 12"coaxal driver? Sorry to bust your chops but this is an econo project.