Ampeg Portaflex PF-20T PF-20T Bass Amplifier Head<div style="text-align: left;"><strong>[Product Information]</strong><ul><li><span class="a-list-item"> RMS power output: 20W @ 4 or 8 ohms </span></li><li><span class="a-list-item"> Preamp: All-tube 2 x 12AX7 </span></li><li><span class="a-list-item"> Power amp: All-tube 1 x 12AU7， 2 x 6V6 </span></li><li><span class="a-list-item"> Tone controls: Bass， Mid， Treble </span></li></ul></div><img src="http://ecx.images-amazon.com/images/I/41iUH4s6i-L.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/41lylKvWKuL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/51I3rDKCTML.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/51ebdSQBSNL.jpg" noproxy>