Shure SH55 Series II [12/48] Unidyne timeline

TIMELINE OF THE SHURE UNIDYNE MODEL 55

1939

1940

1942

1947

55A - $42.50; cardioid; low impedance (50 ohms)

55B - $45; cardioid; medium impedance (250 ohms)

55C - $45; cardioid; high impedance (15,000 ohms)

555A - $60; cardioid; low impedance (50 ohms); shock mount in lower por-

tion of mic

555B - $60; cardioid; medium impedance (250 ohms); shock mount in lower

portion of mic

555C - $60; cardioid; high impedance (15,000 ohms); shock mount in lower

portion of mic

55AV - $46; cardioid, low impedance (50 ohms); increased high frequency

response for voice clarity in paging and two-way radio systems

55BV - $48; cardioid, medium impedance (250 ohms); increased high fre-

quency response for voice clarity in paging and two-way radio systems

55CV - $48; cardioid, high impedance (15,000 ohms); increased high fre-

quency response for voice clarity in paging and two-way radio systems

556A - $75; supercardioid; low impedance (50 ohms); shock mount in lower

portion of mic

556B - $75; supercardioid; medium impedance (250 ohms); shock mount in

lower portion of mic

556C - $75; supercardioid; high impedance (15,000 ohms); shock mount in

lower portion of mic

55 - $55; cardioid; add impedance switch (low-medium-high)

556 - $85; supercardioid; add impedance switch (low-medi-

um-high)

UNIDYNE TIMELINE