VocoPro  VP-300 PRO Single Space 300W Professional Power Amplifier 1/4" or XLR input. Signal to Noise Ratio:. Less than 100dB. Input sensitivity: +4dB Shipping Dimensions:. 13" (L) x 21" (W) x 51/2" (H). Shipping Weight: 18 lbs Shipping Dimensions:. 13" (L) x 21" (W) x 51/2" (H). Shipping Weight: 18 lbs