AI may very well be a groundbreaking and effective tool. As outlined below, charlatans will still use it for cover. Beware especially so-called AI masquerading inside social media.
@4thtry said:
I'm putting together a writeup for the project gallery, but am having difficulty explaining some of the concepts. I wonder if Grok could help me with directivity and spinorama questions?
If the link doesn’t work for you, I can copy and paste. Also I just put in a generic question to describe these concepts- so nothing specific
Thanks. That link, with your question, worked for me. The AI description provided seems to be a good summary of the basic directivity and spinorama concepts, but it is written from the perspective of a reviewer who is evaluating a finished loudspeaker. It is not written from the perspective of a DIY speaker builder who is scratch building a new speaker. No mention of evaluating and measuring individual drivers that may or may not work in a particular design. No mention of why particular xover frequencies are better or worse than others. It is just a very general overview that does not really help me do my writeup. I think the reason the AI description is so generic is because most of the information on the internet centers around reviews of finished products. Information about how individual designers struggle with driver selection, baffle shapes, choice of xover points to avoid directivity problems, etc., is very sporadic and hard to find.
I told Vivian that I will send her a PDF in the next few days. I'll keep plugging away at it and see what I can come up with.
Thanks. That link, with your question, worked for me. The AI description provided seems to be a good summary of the basic directivity and spinorama concepts, but it is written from the perspective of a reviewer who is evaluating a finished loudspeaker.
I just had generally requested: Explain the concepts of directivity and spinorama (in reference to speakers).
So kinda have to expect a general review. If you follow-up with specifics: i.e. and your goal of perspective of a DIY builder,... it should provide more relative and informative responses.
Thanks. That link, with your question, worked for me. The AI description provided seems to be a good summary of the basic directivity and spinorama concepts, but it is written from the perspective of a reviewer who is evaluating a finished loudspeaker.
I just had generally requested: Explain the concepts of directivity and spinorama (in reference to speakers).
So kinda have to expect a general review. If you follow-up with specifics: i.e. and your goal of perspective of a DIY builder,... it should provide more relative and informative responses.
I modified your linked question for Grok, as quoted below, and got a much improved response. Still far from perfect, but much better than before: "explain the concepts of directivity and spinorama, not in reference to loudspeaker reviews, but in reference to someone building his own loudspeakers from scratch." Thanks.
Way, way cooler (IMO) than an old original Bronco (I have one on the new ones - nice, but…). This guy had the engine rebuilt with carb style fuel injection. IH at it’s best.
I went to Menards this morning for water softener salt and they had another stack of those 11.5" x 48" x 3/4" PB shelf boards for only $0.99 each. Strange it wasn't shown on their website. I sorted through the stack and found six good ones. Bam Baby!!! That's pretty much my Indy 2026 project enclosure (I have 2 other boards from the last time). So under $10 after tax
@Nicholas_23 said:
Thats a good looking Scout ! Shame alot of them rusted out. Yup those are rod holders on the roof.
A buddy of mine had an orange IH in college. It was really cool. He did unfortunately find out one day that the drive shaft was aluminum (lots of gas and dumping the clutch on a hot day - rear tires stuck to the blacktop like glue). Once pulled, it ran nicely front wheel drive until he got the new drive shaft.
Hooked up some Singularities that were built by David (djg) on Tech Talk. I've had them for some time, but haven't used them much. They or the drivers might be finding a new home tomorrow. One last session.
So I started the rehab process on my wrist, which consists exclusively of stretching for now. Man, I lost a lot of flexibility and muscle mass during the last 8 weeks of constraint. Hopefully will be well enough to DIY stuff before snow flies since I have some plans, dammit.
Unrelated - very very cool here lately, highs in upper 60s lower 70s. Pretty rare for this time of year. Not complaining, if I had my druthers it would be this weather 365.
@jr@mac said:
So I started the rehab process on my wrist, which consists exclusively of stretching for now. Man, I lost a lot of flexibility and muscle mass during the last 8 weeks of constraint. Hopefully will be well enough to DIY stuff before snow flies since I have some plans, dammit.
Start with a half pint, and work your way up - all the best
Cleaning up my stereo shelves I came across the owners manual and my purchase slip 11/79 of my old Marantz SR6000 (which I lent to my sister way, way back when, and she doesn’t remember what happened to it - sigh).
Those were pretty solid receivers! I love the power meters. I picked up an SR4000 at a garage sale years ago that needed a little TLC. A good general cleaning & Deoxit in the pots & switches and I think I made a quick $125!
It is amazing how much strength and flexibility one loses after eight weeks of constraint. Very painful stretching the wrist out, and I am not yet allowed to do any strength training on it.
So when you see me at Iowa and I am acting like a wussy that is why.
I think I found the source of our spare car's problems. v6 Chrysler Sebring.
It is a ground terminal with literally 10 wires going to it. It attaches to the drivers side shock tower about 1/3 way down right next to where the main wiring harness enters the firewall. It is hidden pretty well under the master cylinder and a bunch of other stuff. Took me 30min just to get it up to this spot. I opened up the fingers on the terminal holding the wires by the insulation.. there were no more copper connections any longer, all corrosion and wire ends like they were just cut.
There is less than 3" of wire between the harness and the terminal. And less than 3" of space between the master cylinder and shock tower. I hope I don't need to cut into the harness to get more length because I'd be doing it blind (no room to have a hand+tool and see at the same time). Time to invest into one of those automatic wire strippers I guess. I've never had that much bad to say about Chrysler compared to others.. but this.. ugh.
Battery stopped charging.. Easy, bad alternator just like any other car.... nope. The PCM controls the charging and it gets it's ground reference from this strap point. I bet it is the source of the transmission code that has it in 2nd gear limp mode too.
The horrors of old "modern" cars. Though a single bad ground (that I found in seconds) turned into a good score for my previous car. Paid $800 and got 100k more miles out of it before losing compression in a cylinder.
Drew,
Lucas strikes again? (My 2004 Ram 2500 4WD truck has all Lucas electrical and goes batsh*t crazy at times for no known reason - battery goes dead sitting for a month, wipers turn on and the horn blows like crazy.
Can you cut it back enough to install a SPLIT BOLT Connector to extend the cable length and seal the fresh wire connections with silicone and tape/heat shrink tubing?
Looks like the grounding crimp got hot from lack of tension in the crimp . . .
It's an '06 so pretty much 20 years old. This kinda stuff is to be expected from spending that much time in Ohio IMO. Just gotta roll with the punches.
Planning to strip them back until I find good copper and try shoving all the ends into a big waterproof heatshrink butt connector connected to a small length of wire, and termainate that to a ring terminal. That is probably the best I can do. I doubt it would need to last another 20years before it makes it's way to the crusher I'm just glad the loud clacking lifter finally unstuck after starting and running it a few times.. It has been sitting years because of these issues. I replaced the fuel pump at one point, which got it starting and driving, only to have it die on the test drive because the charging issue reared it's head.
LUCAS: "Leaves Us Cold and Stranded" or: "Prince of Darkness"
Most cars have some truly stupid design or engineering features; for example, some BMW models have the battery for the sat-nav etc buried in the rear headlining, so you have to pull all the headlining out to change a $50 part. Many European cars have the timing chain at the back of the engine, so you have to take the engine out to replace it.
Our Subaru Outback's headlight globe carked it, but replacing it involved taking the wheel and all the fender lining out - an hour's labour to change a globe.
The Ford Transit van I drive for work just went in for it's 20K scheduled stuff. That included the air filter. They charged $100 just for that. I Googled it and now I know why it seemed high. Lots of stuff in the way, including the headlight assembly. I think the manufacturers do this kind of thing on purpose so their dealers have a nice steady stream of cash coming in the shop doors.
Van's are notoriously difficult to work-on because there isn't sufficient hood area to access the engine from outside the vehicle. $100 for an air filter and labour still seems outrageous though . . .
Comments
AI may very well be a groundbreaking and effective tool. As outlined below, charlatans will still use it for cover. Beware especially so-called AI masquerading inside social media.
Thanks. That link, with your question, worked for me. The AI description provided seems to be a good summary of the basic directivity and spinorama concepts, but it is written from the perspective of a reviewer who is evaluating a finished loudspeaker. It is not written from the perspective of a DIY speaker builder who is scratch building a new speaker. No mention of evaluating and measuring individual drivers that may or may not work in a particular design. No mention of why particular xover frequencies are better or worse than others. It is just a very general overview that does not really help me do my writeup. I think the reason the AI description is so generic is because most of the information on the internet centers around reviews of finished products. Information about how individual designers struggle with driver selection, baffle shapes, choice of xover points to avoid directivity problems, etc., is very sporadic and hard to find.
I told Vivian that I will send her a PDF in the next few days. I'll keep plugging away at it and see what I can come up with.
I just had generally requested: Explain the concepts of directivity and spinorama (in reference to speakers).
So kinda have to expect a general review. If you follow-up with specifics: i.e. and your goal of perspective of a DIY builder,... it should provide more relative and informative responses.
I modified your linked question for Grok, as quoted below, and got a much improved response. Still far from perfect, but much better than before: "explain the concepts of directivity and spinorama, not in reference to loudspeaker reviews, but in reference to someone building his own loudspeakers from scratch." Thanks.
Way, way cooler (IMO) than an old original Bronco (I have one on the new ones - nice, but…). This guy had the engine rebuilt with carb style fuel injection. IH at it’s best.
Izzat rod up top for in-travel-refueling?
Mmmm fly fishing in Colorado. That's a rod holder.
I went to Menards this morning for water softener salt and they had another stack of those 11.5" x 48" x 3/4" PB shelf boards for only $0.99 each. Strange it wasn't shown on their website. I sorted through the stack and found six good ones. Bam Baby!!! That's pretty much my Indy 2026 project enclosure (I have 2 other boards from the last time). So under $10 after tax
They have three foot Formica'd shelves, scratch and dent next to those partical board shelves at my store for $1.50.
Thats a good looking Scout ! Shame alot of them rusted out. Yup those are rod holders on the roof.
A buddy of mine had an orange IH in college. It was really cool. He did unfortunately find out one day that the drive shaft was aluminum (lots of gas and dumping the clutch on a hot day - rear tires stuck to the blacktop like glue). Once pulled, it ran nicely front wheel drive until he got the new drive shaft.
Hooked up some Singularities that were built by David (djg) on Tech Talk. I've had them for some time, but haven't used them much. They or the drivers might be finding a new home tomorrow. One last session.
So I started the rehab process on my wrist, which consists exclusively of stretching for now. Man, I lost a lot of flexibility and muscle mass during the last 8 weeks of constraint. Hopefully will be well enough to DIY stuff before snow flies since I have some plans, dammit.
Unrelated - very very cool here lately, highs in upper 60s lower 70s. Pretty rare for this time of year. Not complaining, if I had my druthers it would be this weather 365.
Cleaning up my stereo shelves I came across the owners manual and my purchase slip 11/79 of my old Marantz SR6000 (which I lent to my sister way, way back when, and she doesn’t remember what happened to it - sigh).
Who knows, this could be it - ha
A friend of ours still has one: beautiful sound, excellent build quality.
Geoff
Those were pretty solid receivers! I love the power meters. I picked up an SR4000 at a garage sale years ago that needed a little TLC. A good general cleaning & Deoxit in the pots & switches and I think I made a quick $125!
It is amazing how much strength and flexibility one loses after eight weeks of constraint. Very painful stretching the wrist out, and I am not yet allowed to do any strength training on it.
So when you see me at Iowa and I am acting like a wussy that is why.
I've heard that people's faces turn white after wrist surgery when asked to do this soon after cast removal.
I think I found the source of our spare car's problems. v6 Chrysler Sebring.
It is a ground terminal with literally 10 wires going to it. It attaches to the drivers side shock tower about 1/3 way down right next to where the main wiring harness enters the firewall. It is hidden pretty well under the master cylinder and a bunch of other stuff. Took me 30min just to get it up to this spot. I opened up the fingers on the terminal holding the wires by the insulation.. there were no more copper connections any longer, all corrosion and wire ends like they were just cut.
There is less than 3" of wire between the harness and the terminal. And less than 3" of space between the master cylinder and shock tower. I hope I don't need to cut into the harness to get more length because I'd be doing it blind (no room to have a hand+tool and see at the same time). Time to invest into one of those automatic wire strippers I guess. I've never had that much bad to say about Chrysler compared to others.. but this.. ugh.
Battery stopped charging.. Easy, bad alternator just like any other car.... nope. The PCM controls the charging and it gets it's ground reference from this strap point. I bet it is the source of the transmission code that has it in 2nd gear limp mode too.
The horrors of old "modern" cars. Though a single bad ground (that I found in seconds) turned into a good score for my previous car. Paid $800 and got 100k more miles out of it before losing compression in a cylinder.
Ouch, looks like a royal pain in the pee hole.
Just be careful that green creep has gone up the wire too.
Drew,
Lucas strikes again? (My 2004 Ram 2500 4WD truck has all Lucas electrical and goes batsh*t crazy at times for no known reason - battery goes dead sitting for a month, wipers turn on and the horn blows like crazy.
Can you cut it back enough to install a SPLIT BOLT Connector to extend the cable length and seal the fresh wire connections with silicone and tape/heat shrink tubing?
Looks like the grounding crimp got hot from lack of tension in the crimp . . .
It's an '06 so pretty much 20 years old. This kinda stuff is to be expected from spending that much time in Ohio IMO. Just gotta roll with the punches.
Planning to strip them back until I find good copper and try shoving all the ends into a big waterproof heatshrink butt connector connected to a small length of wire, and termainate that to a ring terminal. That is probably the best I can do. I doubt it would need to last another 20years before it makes it's way to the crusher
I'm just glad the loud clacking lifter finally unstuck after starting and running it a few times.. It has been sitting years because of these issues. I replaced the fuel pump at one point, which got it starting and driving, only to have it die on the test drive because the charging issue reared it's head. 
You gotta love how they bury things like that in some vehicles. Would pre-packing the crimp connectors with a little grease be of any value?
LUCAS: "Leaves Us Cold and Stranded" or: "Prince of Darkness"
Most cars have some truly stupid design or engineering features; for example, some BMW models have the battery for the sat-nav etc buried in the rear headlining, so you have to pull all the headlining out to change a $50 part. Many European cars have the timing chain at the back of the engine, so you have to take the engine out to replace it.
Our Subaru Outback's headlight globe carked it, but replacing it involved taking the wheel and all the fender lining out - an hour's labour to change a globe.
Geoff
^ Still looking for that "head-slap" smilie . . .
The Ford Transit van I drive for work just went in for it's 20K scheduled stuff. That included the air filter. They charged $100 just for that. I Googled it and now I know why it seemed high. Lots of stuff in the way, including the headlight assembly. I think the manufacturers do this kind of thing on purpose so their dealers have a nice steady stream of cash coming in the shop doors.
Van's are notoriously difficult to work-on because there isn't sufficient hood area to access the engine from outside the vehicle. $100 for an air filter and labour still seems outrageous though . . .