The American Model D-22 omni-directional dynamic microphone
Recommended for public address and sound recording. The D-22 Dynamic Omni-directional is efficient for all audio pick-up. Modern “FULL-VISION” styling for artist and audience. Available with either single-conductor shielded low-loss cable, or two-conductor shielded rubber-covered cable for low impedance, balanced line. D-22 Dynamic: $75, antihalation-finished D-22 microphone available at $5 list additional.
Text and illustrations are from the American Microphone Company D-22 Specification sheet. No microphones are for sale on this site. This information is provided for historical purposes.
Frequency Response: From 100-8,000 cps, plus or minus 5.0 dB
Output Level: −86 dB at low impedance. −52 dB at high impedance (0 dB = 1 volt/dyne/cm²)
Impedance: May be easily and quickly changed from low (30-50) or high (40,000) ohms impedance by removing name plate and changing linkage bars to impedance desired
Diaphragm: Micro-metal alloy diaphragm, unaffected by temperature changes, treated for protection again corrosion
Magnetic Circuit: Alnico V and Armco magnetic iron
Case: Precision machined duraluminum
Finish: Permanent gold and black, anodized
Connector: Cannon XL-3-11 “latch-lock”
Cable: 25 feet of single-conductor shielded rubber-covered cable
Stand Couplings: ⅝-27 thread on combination swivel and “slide-lock”
Slide-Lock: For quickly and easily removing microphone from stand
Weight: Complete microphone (including swivel and “slide-lock”) seven ounces
Dimensions: Overall height (including swivel and “slide-lock”) 8¼ inches. Diameter 1 inch
Packaging: Black leatherette-covered storage box, velvet-lined, rubber-cushioned interior for full protection of microphone when not in use
Apparently at one point there was a TR 3.
Photos courtesy of Dennis Schrank
Fats Domino using an American D-22 during his performance in Shake, Rattle & Rock! (1956)