I have a pair of vintage speakers from the '70's and I would like to know what they're worth. My brother, who gave them to me, says that they are Advent but inside they say Lissen. They have been totally, professionally restored (new rubber, cones, etc.). They're a floor model, about 30" wide and 30" tall. Two 12" woofers, a tweeter, a mid-range and two Accoustical (that's how it's spelled by the knobs) Balance knobs, one for High Frequency and the other for Mid Frequency. I would be happy to e-mail pictures of them since I can't upload the images for some reason.