Data Sheet: 
Coles 4038  
Studio Ribbon Microphone 
 
 
 
4038 STUDIO RIBBON MICROPHONE  
  • Smooth wide frequency response that handles high-end transients without harshness.
  • Classic figure-eight pattern with proximity boost.
  • Excellent off-axis frequency response for superior stereo imaging.
  • Good shock and wind resistance with a long-life ribbon element.
    		•
        The 4038 Studio Ribbon Microphone is a British Broadcasting (BBC) design and used for broadcasting and recording such sounds where a clear smooth wide range frequency response, absent of transient distortion and relatively high sensitivity is essential. 
        The 4038 has a proven reliable performance capability, being since its introduction, used by broadcasting networks throughout the world such as the BBC as well as by top engineers and studios in hit recordings. 
        Frequency response of the 4038 is exceptionally flat from 30 to 15,000 Hz and throughout this range the shape of the bi-directional (figure of eight) polar response is maintained substantially constant both in the horizontal and vertical planes, giving a natural  sonic quality with smooth frequency response. 
     
     
    Coles 4038 Specifications
      
    Polar response:  Bi-directional (cosine, figure-of-eight)  
    Impedance:  300-ohm is standard;  also 30-ohm by special order  
    Frequency response: 30 Hz to 15,000 Hz (Click to see response curve chart)  
    Sensitivity: -65dB re: 1 Volt/dyne/cm2  
    Distortion: 1% THD point at 110 Hz is 125 dB SPL. At 55 Hz, 1% point is 110 dB SPL.  
    Connector:   Western Electric type 4069  
    Dimensions: 197 mm x 83 mm x 61 mm;  7 1/4" x 3 1/4" x 2 3/8 "  
    Weight:   1.08 Kg;  2 lb. 6 oz.  
    Finish:  Black textured enamel over heavy gauge  brass; grille made of perforated brass plate, backed by finely woven monel mesh 
    Hum rejection: Internal hum neutralizing balanced wiring coupled with magnetic shielding of the toroidal ribbon-to- microphone line transformer reduces response to stray magnetic fields by 30 to 40 dB.  

     AEA supplies each Coles 4038 microphone system in a rugged foam-lined plastic  carrying case along with its Frequency Response Chart. Selected Pairs of "Matched" 4038s are also available.The  standard output connector is the Western Electric type-4069.  Four mounting options  are available with the Coles 4038 from AEA.
    For more information on the 4038, check out the AEA Coles 4038 Studio Ribbon Microphone Users Guide available at no charge here on AEA's Tech Notes Page in PDF format (requires Adobe Acrobat 3.0 ). 
     
     
    page design by JGS/Sliding Delta