Gallo Acoustics A'Diva SE 5-inch spherical satellite speaker, sold individually. Wide-dispersion flat diaphragm with no crossover, 80 Hz to 22 kHz on a wall, 4 ohms.
Gallo Acoustics Micro SE 4-inch spherical satellite speaker, sold individually. Its wide-dispersion flat diaphragm, with no crossover, covers 100 Hz to 22 kHz at 4 ohms.