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The Ariel is a tandem transmissionline
resonator enclosure.The two lines are connected at the end; also called
Y-tunnel. Each enclosure consists of two 13 cm woofers and a 28 mm dome
tweeter arranged in d'Appolito shape.
Here is a short listing of the former designs. For detailed information i
recommend to read the interesting description on Lynn Olson's page. There you will find the
details about the design principles
and the development of the crossover.
MK II |
- lines connected at the first part of the lines
- vent at the bottom plate; variable |
MK III |
- little modified line shape |
MK IV |
- modified line shape, connected at end of lines
- vent at bottom plate; variable |
MK 4.5 |
- backpanel stiffer because of a crossbrace
-vent is placed to the back and
ajustable by a panel |
MK 5b,r,s |
- like 4.5, but different vent placement: bottom(b), rear(r),
side(s) |
MK 6c |
- bigger line cross-section, impoved stiffness with double
sided front- and backpanel; more parts can be filled with sand |
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- natural sound
- good dynamic behaviour
- high resolution
- lean front shape
- vent tunable after assembly
- crossover tunable after assembly
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After comparing the different Ariel designs, it seems to me that the MK 6
version has the most advantages concerning stiffness and line cross-section.
Experiece from other TL-speaker projects showed me, that the tuning of damping,
vent and crossover has an essential influence on the sound in the
specific room where you listen to the music; so i decided to combine the
geometrie from MK 6c with the variable vent at the bottom plate from MK 5b. To keep the crossover
tunable i placed the tweeter- electronic parts on a seperate plate behind the tweeter and
the woofer-parts in the housing behind the biwiring-plate at the backside of
the enclosure. By removing the
tweeter or biwiring-plate you are able to adjust the crossover. To damp
housing vibrations the front and backpanel have double thickness and the hollows are
filled with dry sand wherever possible. To get a harmonic coupling from vent
to room, i placed the box on a podest with a strong slope to the floor.
For detailed description look under features.
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