[Elecraft] Yamaha Headphones

[Jim Brown]

On 11/21/2022 4:07 PM, John Marvin wrote:
> Proximity effect has nothing to do with the technology of the 
> transducer, i.e. dynamic, condenser, electret, ribbon, etc.

Yes. In lay terms, it's a property of directional microphones with a 
single rear opening. EV is well known for their Variable-D cardioid 
mics, like the RE10-11-15-16-18-20-27 mics, which have multiple rear 
openings spaced along the "barrel" of the mic. Proximity effect (bass 
boost when very close to the sound source) is greatly reduced by this 
construction. Their first mic of this type was the 666, known as the 
"Buchannon Hammer," because EV was based in Buchannon, MI, and one of 
the company's owners demonstrated its ruggedness by driving nails with 
it. :)  For a few years, AKG and Shure both made a few variable-D mics, 
but they're long discontinued. I still own one, the AKG D224, which is a 
very nice mic.

73, Jim K9YC