This radio was one of the largest Silver-Marshall offered for 1932.  It comprises of a model 728 receiver fitted with a Jensen model D-1 speaker (Midrange/Tweeter) and dual Jensen model D-9 bass speakers (Woofers).  The field coils of the dual woofer speakers are powered by a separate power supply that also serves as a L/C crossover for all three speakers.  I acquired this radio, in September 2000, from an auction in Cicero, Indiana.

Dimensions:
Height...47 inches
Width...26 inches
Depth...14.5

Frequency Range:
BC Band (White)...550 kHz to 1500 kHz
P Band (Yellow)...1.6 MHz to 4.6 MHz
SW1 Band (Green)...3.6 MHz to 9.3 MHz
SW2 Band (Red)...9.5 MHz to 25 MHz
I.F. Frequency...175 kHz

Power Source:
AC...110 Volts

    The schematic and information of this radio can be found at the Nostalgia Air web site by clicking on the link below.

Schematic & Information

Schematic (Triple Speaker)

    This is an artists drawing of the manufacturing plant as it looked when it was constructed in 1928-1929.  Silver-Marshall Inc. occupied this building from 1929 until it went bankrupt in 1933.  This illustration is featured on the company's "General Parts Catalog" for April of 1929.  An aerial view of  this building can be seen using Google Earth when the following address is used:  6429 65th St, Chicago, IL 60638-5101