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Old 20th February 2010, 10:27 PM   #181
mavric is offline mavric  United States
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just got home and read the link Charlie posted, i guess old things never die, that is the first pic i have seen that describes what intentions where the whole time. use the bottom for elecronics and be ready if i go TL, hmmm,
I start building Sunday, will post pics from start to finish, as well as video. No one, that i have seen on this site so far, has done start to finish w/pics, audio/video. if so, i would love to read about it, my first go at it, Mav.
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Old 21st February 2010, 06:22 AM   #182
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Extracts from the Martin Logan's operators manual of the AEON i

Signal Connection
Use the best speaker cables you can. The length and type of speaker cable used in your system will have an audible effect. Under no circumstance should a wire of gauge higher than #16 be used. In general, the longer the length used, the greater the necessity of a lower gauge, and the lower the gauge, the better the sound, with diminishing returns setting in around #8 to #12.

A variety of speaker cables are available whose manufacturers claim better performance than standard heavy gauge wire. We have verified this in many cases, and the improvements are often more noticeable than the differences between wires of different gauge. The effects of cables may be masked if the equipment is not of the highest quality. We also recommend, if possible, that short runs of speaker cable connect the power amplifier(s) and speakers and that high-quality long interconnect cables be used to connect the preamplifier and power amplifier. This results in the power amplifiers being close to the speakers, which may be practically or cosmetically difficult, but if the length of the speaker cables can be reduced to a few meters, sonic advantages may be obtained.



==================================
Electrostatic Advantages
==================================
How can sound be reproduced by something that you are able to see through? Electrostatic energy makes this possible.

Where the world of traditional loudspeaker technology deals with cones, domes, diaphragms and ribbons that are moved with magnetism, the world of electrostatic loudspeakers deals with charged electrons attracting and repelling each other.

To fully understand the electrostatic concept, some background information will be helpful. Remember when you learned in a science or physics class that like charges repel each other and opposite charges attract each other? Well, this principle is the foundation of the electrostatic concept.
An electrostatic transducer consists of three pieces: the stators, the diaphragm and the spacers (see figure 18). The diaphragm is what actually moves to excite the air and create music. The stator’s job is to remain stationary, hence the word stator, and to provide a reference point for the moving diaphragm. The spacers provide the diaphragm with a fixed distance in which to move between the stators.

As your amplifier sends music signals to an electrostatic speaker, these signals are changed into two high-voltagesignals that are equal in strength but opposite in polarity. These high voltage signals are then applied to the stators.The resulting electrostatic field, created by the opposing high voltage on the stators, works simultaneously with and against the diaphragm, consequently moving it back and forth, producing music. This technique is known as push-pull operation and is a major contributor to the sonic purity of the electrostatic concept due to its exceptional linearity and low distortion.

Since the diaphragm of an electrostatic speaker is uniformly driven over its entire area, it can be extremely light and flexible. This allows it to be very responsive to transients, thus perfectly tracing the music signal. As a result, great delicacy, nuance and clarity are possible. When you look at the problems of traditional electromagnetic drivers, you can easily see why this is so beneficial. The cones and domes which are used in traditional electromagnetic drivers cannot be driven uniformly because of their design. Cones are driven only at the apex. Domes are driven at their perimeter. As a result, the rest of the cone or dome is just “along for the ride”. The very concept of these drivers requires that the cone or dome be perfectly rigid, damped and massless. Unfortunately, these conditions are not available in our world today.

To make these cones and domes move, all electromagnetic drivers must use voice coils wound on formers, spider assemblies and surrounds to keep the cone or dome in position (see figure 19). These pieces, when combined with the high mass of the cone or dome materials used, make it an extremely complex unit with many weaknesses and potential for failure. These faults contribute to the high distortion products found in these drivers and is a tremendous disadvantage when you are trying to change motion as quickly and as accurately as a loudspeaker must (40,000 times per second!).


(See attachment)
Figure 18. Cut-away view of an electrostatic transducer. Notice the simplicity due to minimal parts usage.

Figure 19. Cut-away view of a typical moving coil driver. Notice the complexity due to the high number of parts.
Attached Images
File Type: jpg FIG 18.jpg (58.4 KB, 172 views)
File Type: jpg FIG 19.jpg (58.9 KB, 165 views)
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Old 21st February 2010, 08:35 AM   #183
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Extracts from the Martin Logan's operators manual of the AEON i
=============================================
Full Range Operation
The most significant advantage of Martin Logan’s exclusive transducer technology reveals itself when you look at examples of other loudspeaker products on the market today.

The Aeon i uses no crossover networks above 450 Hz because they are not needed. The Aeon i consists of a single, seamless electrostatic membrane reproducing all frequencies above 450 Hz simultaneously. How is this possible?

First we must understand that music is not composed of separate high, mid and low frequency pieces. In fact, music is comprised of a single complex waveform with allfrequencies interacting simultaneously.

The electrostatic transducer of the Aeon i essentially acts as an exact opposite of the microphones used to record the original event. A microphone, which is a single working element, transforms acoustic energy into an electrical signal that can be amplified or preserved by some type of storage media. The Aeon i’s electrostatic transducer transforms electrical energy from your amplifier into acoustical energy.

Due to the limitations of electromagnetic drivers, no single unit can reproduce the full range of frequencies. Instead, these drivers must be designed to operate within a narrow, fixed bandwidth of the frequency range, and then combined electrically so that the sum of the parts equals the total signal. While nice in theory, we must deal with real-world conditions.

In order to use multiple drivers, a crossover network is enlisted to attempt a division of the complex musical signal into the separate pieces (usually highs, mids, and lows) thateach specific driver was designed to handle. Unfortunately, due to the phase relationships that occur within all crossover
networks and during the acoustical recombination process, nonlinearities and severe degradation of the music signal take place in the ear’s most critical zone (see figure 20).

The Aeon i’s electrostatic transducer can single-handedlyreproduce all frequencies above 450 Hz simultaneously. You have in one transducer the ability to handle in elegant simplicity the critical frequencies above 450 Hz.

The crossover phase aberrations that are associated with traditional tweeter, midrange, and woofer systems are eliminated. The result is a dramatic improvement in imaging and staging performance due to the minutely accurate phase relationship of the full-range panel wave launch.



(See attachment)
Figure 20. This diagram illustrates how a conventional speaker system must use multiple crossover networks that have negative effects on the musical performance.
Attached Images
File Type: jpg Fig 20.jpg (51.4 KB, 166 views)
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Old 21st February 2010, 08:44 AM   #184
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Extracts from the Martin Logan's operators manual of the AEON i
=============================================
Specifications

The Aeon i hybrid speaker system consists of a broad-range single-element electrostatic transducer integrated with a quick-response woofer. This approach takes advantage of the benefits that both technologies have to offer. Dispersion is a controlled 30 degrees, achieved by curving the electrostatic transducer element—an elegantly simple solution.

System Frequency Response
43–22,000 Hz ± 3 dB

Dispersion
Horizontal: 30 Degrees
Vertical: 37 inch (94 cm) line source
NAC™ enhanced sound field

Sensitivity
90 dB/2.83 volts/meter

Impedance
Nominal: 4 ohms
Minimum: 1.1 ohms @ 20 kHz

Crossover Frequency
450 Hz

Components
Custom-wound audio transformer, air core coils,
polypropylene capacitors
NAC Driver
1” (2.5cm) silk dome

Woofer Type
8" high excursion, aluminum cone with extended
throw driver assembly, non-resonance chamber format

Power Handling
200 watts per channel

Recommended Amplifier Power
80–200 watts per channel

Weight
55.5 lbs. each (25.2 kg)

Size
10.25 inches W °— 15.5 inches D °— 57.4 inches H
(26 cm W °— 39.4 cm D °— 145.8 cm H)
Attached Images
File Type: jpg aeoni.jpg (35.8 KB, 164 views)
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Old 22nd February 2010, 12:17 AM   #185
mavric is offline mavric  United States
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how do you curve the panels and have the holes in the stator line up or be symetrical? the rear panel will have to be smaller than the front, i understand the concept, but how does it work? curious.
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Old 22nd February 2010, 01:25 AM   #186
mavric is offline mavric  United States
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thank you Charlie for all of your help, here are some pics of getting started.
Attached Images
File Type: jpg P2210116.jpg (511.1 KB, 157 views)
File Type: jpg P2210118.jpg (436.9 KB, 62 views)
File Type: jpg P2220119.jpg (470.9 KB, 59 views)
File Type: jpg P2220120.jpg (465.7 KB, 60 views)
File Type: jpg P2220121.jpg (514.4 KB, 62 views)
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Old 22nd February 2010, 01:34 AM   #187
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cool pics,sorry i didn't get a hold of you it has been a very crazy few days around here. Jer
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Old 23rd February 2010, 01:01 AM   #188
mavric is offline mavric  United States
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i was doing my best to take pics during cutting, grinding, etc. it was getting late and did not have opportunity to take close ups the edges, they are all smooth as well as the long and short ends, no protruding "points" sticking out whats so ever.
i have some test pieces now, so the next is to spray and i post pics as well thickness. Charlie, just got off the phone with parts express, bo info, best to call 3m directly, if some gets a chance, parts express part #082-180. thats what I have. Trying to make sure its none conductive, Charlie allready has a post on this. Thanks
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Old 23rd February 2010, 01:14 AM   #189
mavric is offline mavric  United States
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some more pics
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File Type: jpg P2220122.jpg (693.8 KB, 70 views)
File Type: jpg P2220123.jpg (392.6 KB, 60 views)
File Type: jpg P2220124.jpg (439.9 KB, 44 views)
File Type: jpg P2220125.jpg (342.1 KB, 37 views)
File Type: jpg P2220126.jpg (321.1 KB, 39 views)
File Type: jpg P2220127.jpg (369.5 KB, 42 views)
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Old 23rd February 2010, 01:42 AM   #190
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nice job ,looking good ,jer
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