Here is for sale my Space Heater by Radial Engineering. It is a multichannel rack-mount mixer, analog distortion unit and summing mixer. It also has a headphone amp. I’ve bought it from about 5 yers ago and used it when I needed that vintage tube saturation and analog harmonic distortion. 

Inside there are four 12AX7 tubes and eight custom-wound Eclipse ET-LD2 transformers which are based on Deane Jensen's original designs. It gives you four stereo channels, or eight mono channels, of distortion, with high voltage tube overdrive, featuring individual input and output control for all eight channels. Hence, it can also act as an eight-channel tube summing mixer. 

The actual tube distortion and transformer saturation from these tubes and transformers could be very subtle or really drastic. It can give you different character on any of those 8 different channels. It all depends how you dial ins and outs on each channel. Or it can add grit and a real vintage tube-console vibe to a final stereo mix. 

The unit was kept in my non-smocking studio. It is in immaculate condition and works perfectly. Included the original box.