Here you have another great example of British Audio Quality The Cambridge R50 in near mint condition with the original box’s. These are hard to find in Canada. Auditions welcome. Those are the perfect speakers for tube enthusiasts as the have higher db ratings . Enclosure Type: 4 way vented box Crossover FQ: 400Hz, 3kHz, 10kHz Crossover Type: Cambridge Audio Four-Port Impedance: 8 Ohms Drivers: KEF B139, B110, T27 STC 4001G Dimensions: 448 x 1414 x 331mm (W x H x D) Weight: 44.4kg / 97.68lbs Year: 1972