have a Custom Reason SM25 head with a Custom solid pine Trutone 1x12 cab, this was a custom order by the orignal owner as they only offer the SM25 in a combo as a production, so this head was built into a SM50 chassis and cab otherwise the the SM25 chassis would have been upside down. The original owner wanted the SM25 as it is plenty loud enough for just about anything but also can sound great at lower volumes but also unlike the SM50 the SM25 comes stock with 6v6 power tubes but can also take 6L6 or EL34 tubes with a slight rebiasing. This amp head is in excellent shape, I am only selling as I am looking for a low watt combo amp and would willing to trade for the right deal? This Head sells new for about $2,200. http://www.reasonamps.com/amps_smseries.php