EVF-1181S单18"超低音音箱系统设计用作EVF系列产品的超低频率增强单元。EVF-1181S的尺寸与全频EVF型号完全一样，其配套吊装点可以完美地进行垂直和水平分组安装。
覆盖（-6dB标准） Omnidirectional in normal operating range
环境参数 Standard versions: IEC 60529 IP44. PI and FG versions: IEC 60529 IP55
输入连接 Phoenix/Euroblock style screw terminals; PI and FG versions include dual-gland-nut input-panel cover
额定阻抗 Passive: N/A, Bi-amp: 8 Ω Biamp 
频率响应（-3分贝） 35 - 100 Hz
频率响应（-10分贝） 28 - 650 Hz
建议高通频率 33 Hz
灵敏度（1瓦/1米） 99 dB
最大. 声压级/1米 (计算) 131 dB
系统功率处理（连续/音乐//峰值） 400, 800, 1600 Watts
低频换能器 EVS18SB, 18 in (457mm) Driver
最小负荷阻抗 Passive: N/A, Bi-amp: 6 Ω Biamp 
箱体材料 13 Ply Weather Resistant Birch
栅格 Standard versions: 16-ga Galvanneal, Powdercoat, with screen behind. PI and FG versions: 18-ga Stainless, Powdercoat, with hydrophobic cloth behind
吊挂 (28) M10 Threaded Points (one EBK-M10-EVI kit of four forged eyebolts included)
高度 768.6 mm (30.26")
宽度 675.6 mm (26.6")
深度 726.4 mm (28.6")
净重 45.9 kg (101.19 lbs)