For sale is a rack-mounted Glock Heart Rock I, 2.7 ohm (minimum) version. Works perfectly, very clean. I decided to down size to a Tecamp class D, because I am turning into a crotchety old man. There is nothing wrong with the amp aside from slight noise when turning the channel B trim pot. This amp cranks with solid bass and clean, bell-like high end. Much lighter than the Aggie 750/751. Comes with nice OSP 3-space rack. Will ship well-padded and double-boxed. $1050 shipped to continental USA only. No trades. Link to former thread: http://www.talkbass.com/threads/1150-fs-glockenklang-heartrock-i.1068677/