The SB Acoustics SB12PAC-00 is a 4-inch aluminum cone passive radiator. It has an effective piston area of 50 cm2, a free air resonance of 33 Hz, a compliance of 1.21 mm/N, a moving mass incl. air of 19.2 g, a mechanical loss of 0.32 kg/s, a mechanical Q-factor of 12.4, an equivalent volume of 4.3 liters and a net weight of 78 g2. The T/S parameters were measured on drive units that are broken in.
- Vented reinforced plastic chassis
- Anodised aluminium cone
- Low damping rubber surround
- Long stroke linear suspension
- Easily adjustable moving mass
SB Acoustics SB12PAC-00 Aluminum Passive Radiator
The SB Acoustics SB12PAC-00 is a 4-inch passive radiator that is designed to improve the bass response of full-range speakers. It has a resonant frequency of 33 Hz and a Vas of 4.3 liters, making it well-suited for use in small to medium-sized enclosures. The SB12PAC-00 is made from a vented reinforced plastic chassis and features an anodized aluminum cone with a low-damping rubber surround. It also has a long stroke linear suspension and an easily adjustable moving mass.
The SB Acoustics SB12PAC-00 is a 4-inch aluminum cone passive radiator that has an effective piston area of 50 cm2, which means it can move more air than a smaller passive radiator. The free air resonance of 33 Hz means that it will resonate at that frequency when there is no air resistance. The compliance of 1.21 mm/N is a measure of how easily the diaphragm moves in response to changes in air pressure. The moving mass incl. air of 19.2 g is the total mass of the diaphragm and any air that moves with it. The mechanical loss of 0.32 kg/s is a measure of how much energy is lost due to friction and other mechanical losses. The mechanical Q-factor of 12.4 is a measure of how much energy is stored in the diaphragm compared to how much is lost due to friction and other mechanical losses. The equivalent volume of 4.3 liters is the volume of air that would have the same compliance as the diaphragm. Finally, the net weight of 78 g is the weight of the diaphragm and any other parts that are attached to it.