I recently purchased a complete SWR WorkingPro rig. The guy that I bought it from was the original owner. The rig consists of a WorkingPro 700 head, a 4 X 10 cabinet, and a 1 x 15 cabinet. When reading the manuals for the amp it warns that the overall impedance should not be below 4 ohms. The manual for the WorkingPro cabinets shows all of the cabinets having a rating of 8 ohms which makes sense for driving two cabinets off of that head. The issue is that my 4 X 10 cabinet has a small sticker on the back plate indicating that it's 4 ohms. So my question is is the cabinet 8 or 4 ohms? I the seller bought the entire rig new there is no way that he would buy a 4 ohm cabinet and an 8 ohm with that head? Any input is appreciated?