YD-20,揚聲器 1. 電壓:12V DC 2. 功率: 20W 3.額定阻抗: 4Ω 4. 頻率范圍:550-5000Hz 5.失真度: <5% 6. 聲壓:115-120db
7. 凈重: 0.45 KG