Dear Sirs,
For the moment I’ve only tested the ND91 for T/S parameters and frequency response and the conclusion is that the results are consistent for the 16 drivers tested, but both the impedance curve and the frequency responses downloaded from the official site are a little off, at least in the 2 ltr closed box where they were tested, one at a time.
Therefore I recommend that the files should be updated and/or rectified for this, perhap...
Dear Sirs,
For the moment I’ve only tested the ND91 for T/S parameters and frequency response and the conclusion is that the results are consistent for the 16 drivers tested, but both the impedance curve and the frequency responses downloaded from the official site are a little off, at least in the 2 ltr closed box where they were tested, one at a time.
Therefore I recommend that the files should be updated and/or rectified for this, perhaps, new batch.
For instance the average impedance in free air peaks at 88hz with 83.8 ohms, while the file for the ND91-8 impedance ‘says’ it should peak at a 70hz frequency with 70.6 ohms.
Best regards
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By Edgar S. on 2 June 2018