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Originally Posted by Giganova  my method of recording a CD through speakers has some benefits:
1) The song I chose covers all frequencies (airy voice ... deep bass, and every thing in between, |
Oh, I agree. The source you used covers a wide spectral range, so from a frequency domain standpoint the test is valid. But frequency response of the transformer is only one of the parameters that should be tested. Time domain performance and distortion are others.
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Originally Posted by Giganova
Michael: I am not sure if your statement about the standing acoustical waves due to the parallel grill is valid: as opposed to most LDC designs, where the grill is much larger than the capsule, the ribbon motor covers most of the space inside the grill. I think there is not enough "empty space" inside the head of the mic for standing waves between the front and back end of the grill, but I might be wrong.
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The smaller front / back dimension of the HRM-14b compared to a typical LDC means the standing waves are shorter and thus heard at a higher frequency. In fact, mics like the Nady RSM-2 or Apex 205 have "waffle plates" very close to the ribbon to create HF resonances to lift the top end - the downside is smeared transient response and dips, as well as peaks in the response.