Vintage ball speaker broadband speaker 87 mm / 3.5 diameter. It has a 55 watt power capacity (max. power) and 25 watts rated load capacity. Sound pressure is 86 dB and impedance is 4 ohm. The frequency range is 100 - 20,000 Hz. Features a reinforced paper membrane and foam surround. Box contents include: ball speaker, speaker cable, and drilling template.