Quote Originally Posted by Sir Terrence the Terrible
As viewed from the photo's on Ebay, these speakers are beautiful and very well kept up. And yes the are the original 4024's because they do lack the "liquid cooled" wording on the L-pad, have the ten screws holding the L-pad on, and has binding posts as opposed to spring clips.

More questions CPQ, did the crossover in the 4024 do any kind of time alignment, because it looks like the midrange driver extends all the way to the back of the speaker, and the tweeter doesn't and neither does the woofer.

It appears to me the drivers in the 4024, and the ones on the 4029 are the same. Why did they need ferrofluid cooling anyway? Was the distortion you mentioned in the 4029 eliminated by the ferrofluid?

Thanks so much for the tip on the speakers, I really appreciate it!
The woofers are completly sealed off from the horn and tweeter. Yes there were precise time alignment as I mentioned earlier --" There are very complex capacitor storage for blockage and gates that the 4029's do not have - that is also why ferrofluid was added to this model, the 4029's could not hold range of frequencies so there was distortion...

The ferrofluid did not stop the distortion in the 4029's caused by underlap of frequenices and timeing issues , it was used to keep the drivers from overheating resulting in burnout or persay ,-simply to protect the cheaper drivers from the much cheaper used crossover network in the 4029's

The drivers in the 4024's and 4029's are NOT the same.again also remember the 4029's has less capacitor storage.

The Machs you just bought (4024) will have the very expensive and famous woofers with the 4-layer voice coil that is wound on a brass form , this is the one that can take the power and produce a true 20 Hz that you can feel, it is a very soild woofer that can blow out a match at 6 feet that we have done with a Pioneer SX-1980

What amp are you planning on driving these with?