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The Tannoy Monitor Silver series was released in the early 1950's andproduced until around 1958. Distinguishing physical features of this modelare:

• a silver painted chassis in hammertone enamel
• a lack of a dust-cover on the low-frequency cone

The Monitor Silver was available as:

• Monitor Silver 12-inch
• Monitor Silver 15-inch (also shown above)
  
  

Magnet cover and wiring to the speaker, showing the feed to the compressiondriver diaphragm at the rear.

"Pepper-pot" phase compensation channels that form the couplingfrom the HF diaphragm to the horn throat, which is machined into the magnetpole for the LF driver.

TannoyMonitor Silver 15-inch
Model designation: LSU/HF/15/L

The Silver 15 is visually identical ro the Silver 12 - just having a biggerLF cone (but identical HF horn and diaphragm). A major difference in sound would be apparent between the12 and 15 though, as the crossover design for the Silver 12 ismuch more simple.