[Arran]

 The speaker is correct, my model 96 has one as well, the standard console speaker in use in the 1929-31 models was the Model H speaker. As for why it does not play these sets pretty well need all the capacitors replaced, many of the resistors too. One think to check for is if the audio output transformer is open, each leg of the primary should be connected to the plate pins of the #45 tubes. It could also be an open audio interstage transformer, though that often results in low volume and not a dead radio. Have you tried connecting the antenna lead to the grid caps of each of the #24 tubes? Sometimes one or more of the RF coils can go open, so if one coil is bad between the antenna and the following stage the radio might not pick up anything. Fortunately the RF coils are single layered so they should be easy to repair if they are open.
Regards
Arran