Ohm
On loudspeakers, the ohm is a measurement for electrical impedance and symbolized by Greek character omega “Ω.” Impedance defines how easily electricity (the signal/music) flows through a speaker and the typical ratings for home audio speakers are 4, 6, or 8 ohms, with the lower number meaning less impedance (and greater signal flow).
SVS Prime and Ultra speakers have a nominal impedance of 8 ohms and are designed to excel with both AV receivers and high-end power amplifiers.