LOL ... Good one!
I don't know about the pants, but they could rattle all the dishes in the kitchen any time I wanted them to.
Had them hooked up to a self-built 50w/ch amplifier (which was high power for the time) and a home-brew pre-amp with a 9 band equalizer.
My neighbours hated me.... 🙂
Damrnit, wish I had maty tinman's ability with timber and sawdust:
A box just waiting to be populated with a two-way setup! 😀
Just rumbled back from the cinema with Ford versus Ferrari, 1966. A cracker!
Fans of engineering excellence will love this one. Those heavy old cars might measure well, but they won't go round corners! And they can't stop fast! 😎
Racing always tends to fast and light. Just like Harbeth, IMO: YouTube
This is the bleeding edge, IMO.
An externally hosted image should be here but it was not working when we last tested it.
A box just waiting to be populated with a two-way setup! 😀
Just rumbled back from the cinema with Ford versus Ferrari, 1966. A cracker!
Fans of engineering excellence will love this one. Those heavy old cars might measure well, but they won't go round corners! And they can't stop fast! 😎
Racing always tends to fast and light. Just like Harbeth, IMO: YouTube
This is the bleeding edge, IMO.
Phoney, phoney, phoney, and the title of the article is a lie.
The diagram (which looks too phoney to be a real measurement)claims to show:
A - vibration on the wall of a some kind of cabinet (likely a box of plywood junk), and
B - a woofer loosely attached to a very damped cabinet
Neither shows audibility to your ears, as the title proclaims. Anybody have that audibility data?
BTW, if your woofer is loosely attached to the cab and therefore the frame of the driver shakes all over the place as the patent claims, what kind of sound issues from that kind of unstable driver?
B.
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Tony Gee's build, not mine. I do not like the CSD at HF, cheap tweeter. And other things.
About the importance of Cumulative Spectral Decay: [Video] Speaker measurements by Danny Richie | Audio Science Review (ASR) Forum
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Harbeth loudspeaker, inside
From the video Harbeth Loudspeakers Factory Visit
Light loudspeakers but I can see something black as bitumen or viscoelastic material an the back side.
Front, back
Crossover
From the video Harbeth Loudspeakers Factory Visit
Light loudspeakers but I can see something black as bitumen or viscoelastic material an the back side.
An externally hosted image should be here but it was not working when we last tested it.
Front, back
An externally hosted image should be here but it was not working when we last tested it.
Crossover
An externally hosted image should be here but it was not working when we last tested it.
Harbeth Super HL5plus loudspeaker | Stereophile.com
Black material on the endges too. It seems that the back side is a sandwich.
Harbeth Super HL5plus loudspeaker Measurements | Stereophile.com
Fig.2 Harbeth Super HL5plus, cumulative spectral-decay plot calculated from output of accelerometer fastened to center of top panel (MLS driving voltage to speaker, 7.55V; measurement bandwidth, 2kHz).
Fig.8 Harbeth Super HL5plus, cumulative spectral-decay plot on lower-tweeter axis at 50" (0.15ms risetime).
I like much more the CSD of Ascend Sierra 2-EX RAAL ribbons
Sierra-2EX Measurements
Black material on the endges too. It seems that the back side is a sandwich.
Harbeth Super HL5plus loudspeaker Measurements | Stereophile.com
Fig.2 Harbeth Super HL5plus, cumulative spectral-decay plot calculated from output of accelerometer fastened to center of top panel (MLS driving voltage to speaker, 7.55V; measurement bandwidth, 2kHz).
Fig.8 Harbeth Super HL5plus, cumulative spectral-decay plot on lower-tweeter axis at 50" (0.15ms risetime).
I like much more the CSD of Ascend Sierra 2-EX RAAL ribbons
Sierra-2EX Measurements
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You gotta be careful with oak.
No idea if oak dust is carcinogenic, it is however poisonous.
I don't suppose the life expectancy of ship builders in the 18th century was very high!
Around 6,000 trees were used in the construction of HMS Victory, of which 90% were oak.
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Being a wood sail boat owner I can tell you that salt in the ocean did a great job of preserving those ships.
That is why oak lasts longer than other woods: It contains natural fungicides/pesticides which you don't want to breath in.
Good ventilation and a dustmask is a must when working with oak.
Not many people know this, but I had a career as a HMS. Victory tour guide in the Portsmouth Historic Dockyard:
Victory was already 50 years old when Lord Nelson took on the combined French and Spanish fleets.
IMO, he was on a hiding to nothing. 😱
But somehow emerged 29-0 victor. IMO, down to a close friendship with the Captain of HMS.Temeraire.
Temeraire was the true winner of Trafalgar. It's one of those amazing tales that Nelson restrained Temeraire from leaping ahead into the battle. Nelson wanted to take the battering on the nose. But at the height of the battle, Temeraire came to the rescue. That is why we revere the Turner painting. 😀
Victory was already 50 years old when Lord Nelson took on the combined French and Spanish fleets.
IMO, he was on a hiding to nothing. 😱
But somehow emerged 29-0 victor. IMO, down to a close friendship with the Captain of HMS.Temeraire.
Temeraire was the true winner of Trafalgar. It's one of those amazing tales that Nelson restrained Temeraire from leaping ahead into the battle. Nelson wanted to take the battering on the nose. But at the height of the battle, Temeraire came to the rescue. That is why we revere the Turner painting. 😀
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I am afraid the terms are varied. One says this, the other says that.
The terms:
Ply
Chip
Fiber
Particle
Strand
can mean different products depending where you live.
The terms:
Ply
Chip
Fiber
Particle
Strand
can mean different products depending where you live.
My first model build. I might not have done her the justice she deserved but it was a good starting point.
HMS. Victory:
It is a good starting point. As a neutral, I actually quite liked "Old Ironsides" aka USS Constitution, currently preserved in Boston Harbour. Actually not iron at all. But solid timber. 😀
Not many people know this, but Ozzie Donald Bradman was just about the gutsiest Cricketer of all time, But he'd never have made it to greatness without a partner. Bill Ponsford.
The story I most like about Bill Ponsford, is that he came back to the dressing room with about 80 runs to his name and about 80 bruises on the back from Larwood and Voce's disgraceful bodyline tactics. He said he'd have taken a few more bruises if he could have made a century! 😀
My kind of guy!
It is a good starting point. As a neutral, I actually quite liked "Old Ironsides" aka USS Constitution, currently preserved in Boston Harbour. Actually not iron at all. But solid timber. 😀
Not many people know this, but Ozzie Donald Bradman was just about the gutsiest Cricketer of all time, But he'd never have made it to greatness without a partner. Bill Ponsford.
The story I most like about Bill Ponsford, is that he came back to the dressing room with about 80 runs to his name and about 80 bruises on the back from Larwood and Voce's disgraceful bodyline tactics. He said he'd have taken a few more bruises if he could have made a century! 😀
My kind of guy!
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A batsman may only be as good as his bat!
Just like in the production of speaker cabinets, the composition and construction of fantastic bats involves getting the wood into the right condition.
The surprisingly complex world of cricket bats - Telegraph
I have to buy 2 sheets of plywood and only need a sheet and a half so I plan on making the front baffle with 2 sheets of plywood with Decidamp between them.
As the old math textbooks used to say, "It is left to the reader..." to calculate the volume of the second sheet of plywood and would it be better to add (certainly needless*) rigidity to the front or better to have the extra cubic volume in the box?
B.
* eyeballing some of the pix, sure looks unlikely there are many points on anybody's front panel that are unsupported more than a few inches
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