JJ Electronics T-12AT7-JJ Vacuum Tube ECC81 Electric Guitar Power Amplifier<div style="text-align: left;"><strong>[Product Information]</strong><ul><li><span class="a-list-item"> 9 pin miniature preamp tube (Amplification Factor = 60)， </span></li><li><span class="a-list-item"> Less gain than a 12AX7 </span></li><li><span class="a-list-item"> Preferred by Blues and Jazz Guitarists alike. </span></li></ul></div><img src="http://ecx.images-amazon.com/images/I/418BxHjMg5L.jpg" noproxy>