It’s interesting to note that quite a few vintage valve radios had extension speaker sockets. I remember my grandfather having extension speakers in every room of his house, all switchable from the radio in the dining room. He even had a speaker in the garage for when he was working out there. I suppose it was a lot cheaper than buying a radio for every room in the house. Many speaker cabinets were fitted with a volume control, which was either a low-resistance wire-would pot or switchable resistors.
The extension speaker on the left was manufactured by Whiteley Electrical and Radio Co Ltd. It’s the Stentorian Baby X model. Circa? I rescued this speaker from the local tip. It looked pretty rough but, now that it’s been restored, it will take pride of place in the lounge – subject to my wife’s permission.