While thinking whether little kid Ionas would like one of these speakers as a present...
One scenario is passive speaker connected directly to headphone out.
Other scenario is with inside it a Pleiades 2N3055 one transistor amplifier in class A (electrons flowing all the time).
This means quite heavy power consumption so...
One side of the triangular pyramid (triangular pyramid is a Vicky's idea) may have the drive unit. Side 2 and 3 may have each a monocrystaline small solar panel.
Internal batteries in Bulgin battery holders could be slowly charged in real time. Fuses for safety etc.
The active speaker could be also used as a pyramid fast battery charger if left under the sun.
Photons from sun creating photoelectrons (emmited electrons from the photovoltaic surface). The waken up electrons by their friends photons arriving from the sun get to work storing themselves to batteries or flowing all the time through the amplifier operating in class A.
2 sides of the pyramid are convenient for following up the sun trajectory through the day.
The first linoleum Pleiades pyramid monitoring speaker with possibly be in red (Tarkett linoleum Etrusco single color series). The color code is nice as it is a red combination with black drive unit, black solar panels. Just 2 colors.
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