The Ammonit
By Harald Werner
07 Mar 2001
Paintwork
In case you have used the filler aerosol on both the base and the snail, the varity of colours available is unlimited. In car assessory shops, super- and hypermarkets you can find the full palette of paints and varnishes in spray cans.
You could even take your snails to a professional varnisher. This is more expensive, but you can be sure the work will be perfect.
I did it on my own, but it was not easy: the aerosol paint in cans is very thin, which is why it should be applied in very thin layers and therefore more often. But give the paint time enough to dry.
The shades I used were "nacre" for the snails and "granit-grey" for the base. The paint for the base is a new type (manufactured by duplicolor), coarsely grained and giving an impression of real stone.
Build in the drivers
Before mounting the low-midrange driver, the damping material has to be inserted: a piece of polyester wool has to be stuffed behind the passage from the place of the driver into the snail´s winding alley. But make sure that the TML is still open.
An airtight sealing for the drivers can be cut from a foam sheet (available in DIY shops)
Frequency crossover
As a suggestion, here are the values for the second-order Butterworth filters:
High pass: MKT Foil Capacitor 6.8 mF
Air-Core coil 0.3 mH
Efficiency adaption R1 2.7 W and R2 15 W
Low pass : MKT Foil Capacitor 10.0 mF
Air-Core coil 2.6 mH
Impedance: 8 W
Stands
The speakers´ stands are made by a black-smith. The measurements of the base can give the sizes of the upper and lower plate of the stand. They are 60 cm high. A hole in the center of the two plates leads the cable from the crossover through. Therefore I have to use spikes.
Erecting the speakers
Put a pillow on the ground and put the snail upon it on its back (carefully). Then place the stand near the base and push the cable trough the hole in the bottom plate. Grab the cable through the hole in the bottom plate and pull it out. Then stick 4 pieces of glaziers´putty (about the size of a hazelnut) on the corners of the stand´s upper plate. Shift the stand closer to the base. Now the speaker can be erected. Make sure that you do not wear a belt with a buckle or clothes with metal buttons etc. Just ask a friend for help.
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