The Rodin Coil itself is the speaker. When a magnet is placed in the center, accoustic waves are produced by the vibration of of the magnet. This is caused by the magnetic field generated by the wires.
Its been called a high definition speaker. However the sound quality is not one of its primary functions.
Here is a demonstration of the sound quality on the Accelerator
The coils are wired like a speaker with 8 ohms. Plugs into an amplifier like speaker wires, two channels. Sound/frequencies play counter rotating each to other, creating implosion into the center, which creates a profound bio active field, for rejuvenation, coherence inthe aura, and building up charge.
The black coils are made from a custom crushed blend of shungite, magnetite, black tourmaline, fulgurite, and a full spectrum of chakracolor stones.
The clear coils are the ecopoxy mixed with crushed quartz and selenite
The blue ones are made with the rare 24k gold bonded Aqua Aura Quartz throughout and crushed quartz and selenite at the core.