Vintage JBL 4311B Studio Monitor speaker set with the Carver M400a Cube Magnetic Field Power Amplifier. I'm the second owner of the speakers and amp set and have had them for a little over 20 years. The cabinets have a couple dings that were there when I got them. These speakers absolutely rock! The few times that I do use them now, I just plug my phone into the amp and play my Mp3's through the system. The link posted in this add is for the speaker's specifications. Please contact me via email if interested.