I gather Terry started the internal baffle 3/4in down from the top deliberately in order to install a grill. I ran across a post in the archives commenting something to the effect that it was to prevent it from becoming a rubbish bin... pretty tall one. 😉
Horrible news about Terry. I heard about it this morning, but didn't like to go public at that point. Living in the UK, I can't do much, but I do now have an object very firmly in the forefront of my audio mind. Dave and Dan know about it already as I've discussed it with them. Greg, you have mail. 'Can't make it public yet -hope you understand; and guys -if I'm a little sporadic on the thread for a while, please accept my apologies in advance.
In the meantime, I'll publically say it: Terry is the person who first properly sparked my interest in DIY cabinets, even though the BIB was not the first box I made. I have enormous respect for him as a designer, but also as a person. He's encouraged people to experiment and think laterally; in audio, and other fields, and always offered help whenever he could. Although we only had brief contact via email some time ago, for my part I consider him a friend, as he was to the whole DIY audio community. We all owe him a massive vote of thanks, and our best wishes and love go out to him, his wife, and his close friends.
Not well put, but it's sincerely meant.
My very best regards to you all, but especially Terry and his wife Leslie
Scott
Horrible news about Terry. I heard about it this morning, but didn't like to go public at that point. Living in the UK, I can't do much, but I do now have an object very firmly in the forefront of my audio mind. Dave and Dan know about it already as I've discussed it with them. Greg, you have mail. 'Can't make it public yet -hope you understand; and guys -if I'm a little sporadic on the thread for a while, please accept my apologies in advance.
In the meantime, I'll publically say it: Terry is the person who first properly sparked my interest in DIY cabinets, even though the BIB was not the first box I made. I have enormous respect for him as a designer, but also as a person. He's encouraged people to experiment and think laterally; in audio, and other fields, and always offered help whenever he could. Although we only had brief contact via email some time ago, for my part I consider him a friend, as he was to the whole DIY audio community. We all owe him a massive vote of thanks, and our best wishes and love go out to him, his wife, and his close friends.
Not well put, but it's sincerely meant.
My very best regards to you all, but especially Terry and his wife Leslie
Scott
I think AA and 6moons are setting something up at the moment, which should go live in the next few days.
If those in the know don't mind, maybe you can post the info here and start a new thread.
The BIB is the first cabinet I built and sold me solidly on DIY. They were a crappy build, but I continued with them for some time. I had consulted via email with Terry on several things over the past couple years and he has always shared his honest opinion, which I value. His work always makes me drool, just wonderful. Here's to a thorough, speedy recovery!!
The BIB is the first cabinet I built and sold me solidly on DIY. They were a crappy build, but I continued with them for some time. I had consulted via email with Terry on several things over the past couple years and he has always shared his honest opinion, which I value. His work always makes me drool, just wonderful. Here's to a thorough, speedy recovery!!
Hi Scott – do you think meeting approx in the middle at 145 line length would be a good compromise for a Hemp FR8 and/or Pioneer B20 BIB?
I’m just wondering what else I can do with my B20’s… but thinking of an easy upgrade path. I like rolling drivers!
Hemp Acoustics FR8
L = (Line length) 150.5"
Zdriver = Driver 30.1" down from sealed end of cabinet
Sm = 200"^2
http://www.zillaspeak.com/bib-hemp.asp
Pioneer B20FU20-51FW 8" full range
L = (Line length) 138"
So = Driver 30" down from sealed end of cabinet
Sm = 200"^2
http://www.zillaspeak.com/bib-pioneer.asp
Peace,
Godzilla
I’m just wondering what else I can do with my B20’s… but thinking of an easy upgrade path. I like rolling drivers!
Hemp Acoustics FR8
L = (Line length) 150.5"
Zdriver = Driver 30.1" down from sealed end of cabinet
Sm = 200"^2
http://www.zillaspeak.com/bib-hemp.asp
Pioneer B20FU20-51FW 8" full range
L = (Line length) 138"
So = Driver 30" down from sealed end of cabinet
Sm = 200"^2
http://www.zillaspeak.com/bib-pioneer.asp
Peace,
Godzilla
I'm sad to hear about Terry Cain. He has contributed so much to the community and the fullrange cause.
In regards to the recent discussion, I've been curious to see what the response of non-optimized BIB's looks like. What does the response look like if you screw the dimensions up a bit (say, if the CSA or length is 10% off)? I think I remember seeing graphs in some previous post showing what a severely undersized BIB would look like, but how about a severely oversized BIB?
I know the sims take a great deal of time. GM and Scott have gone above and beyond running all of these simulations for people. I'd try some combinations myself if only I had a PC.
Paul
In regards to the recent discussion, I've been curious to see what the response of non-optimized BIB's looks like. What does the response look like if you screw the dimensions up a bit (say, if the CSA or length is 10% off)? I think I remember seeing graphs in some previous post showing what a severely undersized BIB would look like, but how about a severely oversized BIB?
I know the sims take a great deal of time. GM and Scott have gone above and beyond running all of these simulations for people. I'd try some combinations myself if only I had a PC.
Paul
It depends on the driver as well as to how bad it would be. I don't have time to run a MathCad example sim right now, but generally, you'd get a large peak at Fc, followed by a dip, then heavy ripple. That said, the decrease in pressure after it leaves the terminus will probably go some way to mitigating this. At least, I think so. Will probably depend on the cab / ceiling height ratio. Greg?
Jeff -I don't see why not. You'll loose a little LF, but driver rolling is something I'm looking into at the moment, in the hope of creating a generic BIB that should suite a wide range of drivers in the 5in - 7in range, possibly a few 4 1/2in units too.
Jeff -I don't see why not. You'll loose a little LF, but driver rolling is something I'm looking into at the moment, in the hope of creating a generic BIB that should suite a wide range of drivers in the 5in - 7in range, possibly a few 4 1/2in units too.
I have been leaning towards the 2001 BIB with the B20's to justify a cheap project... get them into the basement against the walls/corners... no need for a sub (save money)... then next birthday/holiday season/fathers day... SWAP FOR THE HEMPS!
The B20's have been a GREAT test mule for me over the years... sealed, ported, future BIB... a bargain for $25 IMO!
Helper tweeter on back/front of course.
Thanks Scott!
Godzilla
The B20's have been a GREAT test mule for me over the years... sealed, ported, future BIB... a bargain for $25 IMO!
Helper tweeter on back/front of course.
Thanks Scott!
Godzilla
No worries. I'd check the clearance of the magnet and sloping baffle BTW -might need an additional false baffle to help with that.
Godzilla,
Why not just make the full on Hemp 2001 cabinets and dropping your B20 into them for the now? GM said that extra line and/or mouth just makes drivers seem more relaxed, so rolling in anything that has already been speced with less line or mouth should still be a decent match.
Kensai
Why not just make the full on Hemp 2001 cabinets and dropping your B20 into them for the now? GM said that extra line and/or mouth just makes drivers seem more relaxed, so rolling in anything that has already been speced with less line or mouth should still be a decent match.
Kensai
I may do just that… but first I must finish up my BIB which remains 75% complete in my garage. My goal is to finish them before December and get them in my office!
The next project will probably be another boring TB in a sealed or ported box and a small sub for the new small den.
The 2001 would be in the basement which has short ceilings… but I may build anyway and stuff the BIB openings to compensate. I’m just thinking things thru now.
Peace,
Godzilla
The next project will probably be another boring TB in a sealed or ported box and a small sub for the new small den.
The 2001 would be in the basement which has short ceilings… but I may build anyway and stuff the BIB openings to compensate. I’m just thinking things thru now.
Peace,
Godzilla
Well, I'm just going to project some positive energy out there to help you get through your current BiB construction. I've been waiting to hear your impressions for some time now, and now that I know there might be a pair of monoliths with B20s down the line after, I'm more anxious than ever ;-p
Oh, and Scott, you'd mentiones some sundry pages back that you'd decided to K-Slot the back of your BiB . . . did that get put on hold due to your BiBs being speakernapped?
Kensai
Oh, and Scott, you'd mentiones some sundry pages back that you'd decided to K-Slot the back of your BiB . . . did that get put on hold due to your BiBs being speakernapped?
Kensai
Unfortunately yes. And no. I managed to do the 165s, and there did appear to be an improvement in the midband, but I can't be sure, because I did the mod in Lancashire where they currently reside, and didn't have much chance to listen to them. I gather Eric thinks it's an improvement.
FWIW, I mentioned the K-Slot thing to Bill Wood, an Arch-Lord of the horn speaker, Jedi wunderkind of Yorkville Sound, in Toronto, and his gut feeling was that the slotback BIB was a Good Thing, ----based only on years and years of experience, and its resultant instinct.
My BIB168's are cut down on a 20' wavered angle, to increase the effective width of the mouth, plus, it adds greatly to the lines, the horizontal perimeter reminiscent of the tail of a quarter note, and overall physical perspective, especially when seated, they are fairly "tall," at 66 inches. I liked that design, as I see the BIB speaker as a musical instrument, as opposed to a box with a bunch of drivers, all connected with metallo-ceramic prosthetics, which at this point are guaranteed to ruin the sonic fun...
I think for the 5 inchers I will measure a K-slot. Just thinking out loud here.
My BIB168's are cut down on a 20' wavered angle, to increase the effective width of the mouth, plus, it adds greatly to the lines, the horizontal perimeter reminiscent of the tail of a quarter note, and overall physical perspective, especially when seated, they are fairly "tall," at 66 inches. I liked that design, as I see the BIB speaker as a musical instrument, as opposed to a box with a bunch of drivers, all connected with metallo-ceramic prosthetics, which at this point are guaranteed to ruin the sonic fun...
I think for the 5 inchers I will measure a K-slot. Just thinking out loud here.
I just have a personal investment in the idea because I thought of it before I caught up with the statement of it in this thread ;-p If I manage to build something with them, they will be sketchy hand carved beasts . . .
Kensai
Kensai
http://www.zillaspeak.com/bib-pioneer.asp
I added this sketch for a possible 2001 B20 BIB... Imagine that running off a Sonic Impact amp and a small portable cd player.
Might be the biggest sound around for cheap cheap cheap!
I added this sketch for a possible 2001 B20 BIB... Imagine that running off a Sonic Impact amp and a small portable cd player.
Might be the biggest sound around for cheap cheap cheap!
Attachments
Now those are funky. So they're actually putting the slot inside? I would think that would change things quite a bit. Then again, there's a bit of magic to the cab. Hmmm...
there is another version...
of the Wadhoorn that is inverted and has a karlson slot on the inside divider as well as on the real opening. Tride to post it but the pic is too large and can;t see how to shrink it down to size.
of the Wadhoorn that is inverted and has a karlson slot on the inside divider as well as on the real opening. Tride to post it but the pic is too large and can;t see how to shrink it down to size.