Whirlwind DIRECT2 Dual Direct Box<div style="text-align: left;"><strong>[Product Information]</strong><ul><li><span class="a-list-item"> Impedance Ratio (input to output per channel) - 133 - 1 </span></li><li><span class="a-list-item"> Frequency Response - 20Hz-20kHz </span></li><li><span class="a-list-item"> Level Change (input to output) - -20dB (pad out)， -40dB (pad in) </span></li></ul></div><img src="http://ecx.images-amazon.com/images/I/51fB7jE4AfL.jpg" noproxy>