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The Mirrophonic system and the Altec VOTT are very different beasts. The development of these systems could take a book to explain, but they are very different.

It doesn't matter: DIYer posted better pictures.

The voice coil is in a pretty conventional magnetic gap. If you try to visualize the dome and voice coil as facing to the rear, facing away from the throat of the driver, then it more clear. Here is a page with the picture of an Altec 34647 diaphram, viewed from the part which is facing toward...

Please look at this diagram of a conventional compression driver - the key defining feature of this type of driver is the presence of a phase plug: http://www.lansingheritage.org/images/altec/specs/components/802d-804a/page1.jpg There's no sense getting worked up about all of this: your horns...

Here is a cross section of an Altec Lansing compression driver: http://www.lansingheritage.org/images/altec/specs/components/802d-804a/page1.jpg The feature which distinguishes a traditional compression driver is the presence of a phase plug in front of the diaphram. The Klipsch legacy drivers...

There is a sealed chamber behind the driver which should provide the same loading as the column of air in the horn proper. Compression drivers are limited to frequencies above the bass. The lowest frequency I've seen a compression driver used for is 300Hz.

If you are referring to the large HF horn, absolutely not. Technically a regular driver mounted at the end of a horn is a waveguide. A traditional horn is loaded with a compression driver, which increases the efficiency and transient response dramatically. Do a google search for compression...

You weren't paying attention in class. There is a 100k resistor in series with the input of the pot.

Ugh, why bother. BTW, those horns / drivers are intended for very large auditoriums and are way mismatched to the bass cabinet in efficiency. I've heard that combination while I worked for Altec, and it sounds terrible.

I do know that watching 3D for any length of time causes eyestrain for me.

I agree. I still believe the Altec Lansing A-7 series speakers can be made to be far superior to anything in the Klipsch heritage line, or any other speaker available now. The only disadvantage of the A-7s is that the bass cabinet needs to be dressed up a bit for those people who don't like...

Uhhhhh...I think we're getting a bit out there...... SIMPLY.... Big ass speakers are better than wimpy teeny tiny little speakers. :music-rockout:

I've never tested with one large driver verses multiple smaller ones, but I would imagine that it would still be true if the total radiating area is the same (within reason of course....fifty 2" drivers won't do...)

Wide dispersion is easy to do. Even the early Bose 901 speakers did that, and they couldn't by any stretch of the imagination be described as having a good sense of scale. Soundstage is part of the recording (either its there or it isn't, depending on the skill of the engineer) and having an...

Smaller horns merely have a higher cutoff frequency than larger horns - it has absolutely nothing to do with dispersion or even coverage. Any size of horn can be made to have any dispersion coverage the designer wishes - dispersion is not a factor with horn size. Hey, I'm a fan of large horns...

I don't buy the Klipsch answer that dispersion is the reason. If that were true, then any number of small speakers which have wide dispersion would have a similar sense of scale as a much larger speaker.

I wonder if restoring dynamics might be a case of "be careful what you wish for". I have a feeling many people will be disappointed in the more bland and lifeless sound of recordings with more dynamics after hearing compressed recordings for so long. The audible impact of the type of limiting...

See my previous reply. Large QUALITY speakers will always cost more than small speakers of equal quality. I simply meant that larger speakers (with larger drivers) will have a better sense of scale than small speakers (with smaller drivers) of equal quality.

I never said anything about a large speaker and a small speaker of equal price points; that's impossible to do because obviously the large speaker will involve quality cuts. I always assume a quality product in each category, and never imply a cheaper verses more expensive product with the same...

It is pretty routine to "bulk up" so called high-end amps with things like billet faceplates which don't effect the sound quality at all. The circuitry is the same as in the lower priced line, but the buyer doesn't know that.