DVV, the amount of spelling errors that you make are an insult to the readers of this thread. And I know you can write flawless English.[/QUOTE
Dun wury about speling. The inglish don kare eiver
Mor L8r
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I also found that in general you can close the loop at higher F's with CFA.
You have some outstanding designs OS - you are to be congratulated. And especially thanks for sharing with everyone.
+100.You have some outstanding designs OS - you are to be congratulated. And especially thanks for sharing with everyone.
Dan.
There is a limit to everything. At some point, it beome a buy-in job altogther, no trace of any own work. How then is it YOUR product? Wht's yours if you buy everything in?
Think back to the golfen era of Italian cars, the 1960ies. Yer, they bought in Detroit engines, but they also usually did things to them, like tuning them to their taste. People like ISO (Grifo. lele, etc), De Tomaso (Mangusra, Pantera, Lomgchamps, etc) Intermeccanica (Indra, etc), etc. Ditto for AC cars of UK, Jensen as well, but Jenden added all wheel drive no Detroit car had at that time. (Not counting SUVs and trucks).
No harm in that, Gerboxes are expensive to develop, way above the means of small luxury car manufacturers. Hardly anybody does their own these days, why should they when ZF does it just as well, if not netter, and at a lower price?
Sure, big companies would just love to sell you a special run of 10 of their usual run od 10,000 engines. At a special, just for you price. You call it integratiotn to me that's just slapping things together. Mind you, it can work on occasion, as it did for say Lotus who use TOYOTA'S V6 in aspirated and turbo mode for their top model, but I am unaware of their sales figures, so I cannot know how ell it workes out for them.
CFA
Here is an example of an 8 transistor core CFA config (my head phone amplifier of 2-3 years ago); The test signal (yellow) is just below the amps distortion:
A couple years ago, I said the CFA sounds better and is easier to stabilize. That started a discussion of what is a CFA? and also some designs by Bonsai and Dadod. OS decided to see by doing as whole bunch of each topology and combinations. But as I and OS and many, many others hear them, the CFA is always cleaner, more detailed and just more real/accurate sounding..... faster as heard on brushes, finger snaps or other transient signals. Esperado here has been saying the same thing.
However, if there is any audible correlation to a measured parameter, the higher slew rate amp is better sounding. CFA excel in easy to get high SR and still have low distortion as well. That is the only parameter that is significantly difference from VFA and CFA of OS's maxed out designs. The DADoD CFA amp is also up around 450v/usec SR with ultra low distortion.
Is there a 450v/us SR VFA of same power output etal and as low THD to compare with 450v/us CFA?
Same Same.
Case closed?
THx-RNMarsh
Here is an example of an 8 transistor core CFA config (my head phone amplifier of 2-3 years ago); The test signal (yellow) is just below the amps distortion:
A couple years ago, I said the CFA sounds better and is easier to stabilize. That started a discussion of what is a CFA? and also some designs by Bonsai and Dadod. OS decided to see by doing as whole bunch of each topology and combinations. But as I and OS and many, many others hear them, the CFA is always cleaner, more detailed and just more real/accurate sounding..... faster as heard on brushes, finger snaps or other transient signals. Esperado here has been saying the same thing.
However, if there is any audible correlation to a measured parameter, the higher slew rate amp is better sounding. CFA excel in easy to get high SR and still have low distortion as well. That is the only parameter that is significantly difference from VFA and CFA of OS's maxed out designs. The DADoD CFA amp is also up around 450v/usec SR with ultra low distortion.
Is there a 450v/us SR VFA of same power output etal and as low THD to compare with 450v/us CFA?
Same Same.
Case closed?
THx-RNMarsh
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Lotus go bust every couple of years, their business model never works. Who said I was looking at building 10 cars. If I was would be crate engine, crate geabox etc then off to one of the many many specialists that can convert to my spec. Even the big guys do this. AMG for example even before merc effectively borged them.
Take https://en.wikipedia.org/wiki/Caterham_7_CSR factory duratec with a few cosworth tweaks bought as a crate engine. less than 5k made each year.
Or the VW passat W8. maybe 5000 sold in 3 years. I've certainly never seen one on the road.
Now being british and old fashioned I feel the last real Bentley was made in 1932. Everything from then till them become VW was badge swapping. Real Bentleys were a chassis that you then sent to a coachbuilder to turn into the car you wanted. Proper stuff!
Works of fine art in engineering and quality.
https://www.youtube.com/watch?v=slQ9E1s1FuQ
Great Bentley W12 Twin-Turbo 6L engine, dual OHC. Mild cam and tuning. 650#ft Trq at 1500rpm.
[makes a heavy car seem light]
The same engine design extended to make the Bugatti Veyron. W16, 8L quad Turbo etc.
Both designed by VW.
Watch a Bugatti Veyron W-16 engine being hand-built
-RNM
https://www.youtube.com/watch?v=slQ9E1s1FuQ
Great Bentley W12 Twin-Turbo 6L engine, dual OHC. Mild cam and tuning. 650#ft Trq at 1500rpm.
[makes a heavy car seem light]
The same engine design extended to make the Bugatti Veyron. W16, 8L quad Turbo etc.
Both designed by VW.
Watch a Bugatti Veyron W-16 engine being hand-built
-RNM
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Not fine art. Fine art has no purpose other than to look nice. It's engineering.
https://upload.wikimedia.org/wikipe...4/Napier_Lion_II.jpg/300px-Napier_Lion_II.jpg is a proper W12. Sounds wonderful, pig to start. Does not corner well at all. DOHC in 1917!
VW uniquely like odd low angle V engines. 15 degrees in the VR6. Sort of a straight 6 squished a bit. The VR6 begat the VR5, and begat the W8, which in turn proved the W12 could be built. So they started in the late 80s on development and got a few million miles experience in shopping trolleys. Very sensible evolution path. Still far more engineering than art. In fact form follows function to the max.
https://upload.wikimedia.org/wikipe...4/Napier_Lion_II.jpg/300px-Napier_Lion_II.jpg is a proper W12. Sounds wonderful, pig to start. Does not corner well at all. DOHC in 1917!
VW uniquely like odd low angle V engines. 15 degrees in the VR6. Sort of a straight 6 squished a bit. The VR6 begat the VR5, and begat the W8, which in turn proved the W12 could be built. So they started in the late 80s on development and got a few million miles experience in shopping trolleys. Very sensible evolution path. Still far more engineering than art. In fact form follows function to the max.
Apparently you don't know any artists very well. It is often a compulsion to do the work. They keep at it until they are satisfied or frustrated. Sort of like RNM and his pursuit of audio. (And cars.)
Now for a very basic car question. In a properly aligned car when turning a circle (Much greater than the wheel base) do the rear wheels track inside or outside of the front wheels?
In the 70s I had a few Maserati 3500 .....the clutch cylinder in the 3500s came from a..........Hillman Imp!!!
More seriously though Rolex in many of their now collectable Chronometers used Zenith movements.....and Zenith themselves used - eventually - ETA mass produced movements. [I use day to day a 1960s Zenith which - having just been serviced locally - is running at 4 sec. a day accuracy. Not bad for an 60s hand wind]
Actually not!( may depend on the camber of the rear wheels, Mr Simon)
All I can say is I have a 29 years old Honda civic. Like new and never had any problem. A good friend of mine had a Golf VW at the same time (same kind of car)... a nightmare and dead before 200 000 Km.
My drivers are JBL2426J. They were supposed to be 16 ohms, they are 6 Ohms DC, perfect to be compensated for 8, so.
They suffered at this time form a factory defect in many of their samples (not perfectly centered) so, we were obliged to sort them at Harman.
Their response curve need to be corrected in order to be slowly descending but flat up to 16 000 Hz. With this big horn,(see attached) the Xcross was at ~700 Hz. (They have modified the all enclosure in a very bad way since the time my firend produced-it)
We tried NAD at this time, were not fully satisfied. I don't know about more modern drivers, as i have nothing i would like to change from mines.
If you are really interested, i can look if i still have some measurement's paper of the response curve and send-you the filter's schematic.
MHP (la Maison du Haut-Parleur) : concepteur français de kits d'enceintes pour la HI-FI et le Home Cinéma...
Oh if the artist drives themselves mad or to death in the pursuit of the perfect sliced sheep that makes it very fine art. Look at Van Gogh. Slicing his ear off made his works very valuable when it was way to late to be of any use to him.
Depends
My kit car used to love power oversteer. Assuming you are not talking about a car with rear steer or trick diffs its inside. Nice diagram of the effect here http://mrl.nyu.edu/~dzorin/cg05/assignments/car.pdf .- Status
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