Hifisound Posted June 18, 2015 Report Share Posted June 18, 2015 Just thought of sharing these: http://www.parts-express.com/pedocs/more-info/audio-xpress-dayton-subwoofer-review-april-2015-part-1.pdf http://www.parts-express.com/pedocs/more-info/audio-xpress-dayton-subwoofer-review-april-2015-part-2.pdf I wonder how/when would just 2" voice coil of dvc385s be a problem. At very high SPL ? (Else otherwise, DVC385 has a very nice sensitivity) Link to comment Share on other sites More sharing options...
Infrasonic Posted June 18, 2015 Report Share Posted June 18, 2015 Great read! Thanks for posting this. I have always said how great the DVC385' are and they still are. Nice displacement and SQ for the dollar. Link to comment Share on other sites More sharing options...
coolrda Posted June 18, 2015 Report Share Posted June 18, 2015 Even with online print and such this is one of the few mags that I've kept around over the years. Lots of interesting tidbits. Link to comment Share on other sites More sharing options...
maxmercy Posted June 18, 2015 Report Share Posted June 18, 2015 Now they would have thrown that DVC in an F20 and compared..... But seriously, great articles, nothing we don't know, but well written and no BS. No replacement for displacement. JSS Link to comment Share on other sites More sharing options...
Hifisound Posted June 19, 2015 Author Report Share Posted June 19, 2015 Apart from the 2" coil question , I had one more doubt related to the distortion measurements : In the article they have been done at 100dB at 1m. Now due to difference in roll off of FR between UM12 and DVC385, UM12 would have higher output (between 20-40Hz)And if one EQes DVC385 to have same output as um12 below 40Hz, its otherwise low THD would rise non linearly, isn't it ?Only then can find out which of the two has a lower THD, right ? Unless one is not going to EQ or boost the SPL below 40Hz... Link to comment Share on other sites More sharing options...
SME Posted June 19, 2015 Report Share Posted June 19, 2015 Apart from the 2" coil question , I had one more doubt related to the distortion measurements : In the article they have been done at 100dB at 1m. Now due to difference in roll off of FR between UM12 and DVC385, UM12 would have higher output (between 20-40Hz) And if one EQes DVC385 to have same output as um12 below 40Hz, its otherwise low THD would rise non linearly, isn't it ? Only then can find out which of the two has a lower THD, right ? Unless one is not going to EQ or boost the SPL below 40Hz... I'll just say that the subject is quite complicated. A single distortion measurement with 100dB at 1m doesn't tell you much at all. Ricci's distortion measurements (on data-bass.com) are a lot more helpful because they reveal how distortion changes as the woofer approaches its limits. The trouble is that distortion depends on more than just the woofer. It depends on the enclosure too, and as Bosso Dave has pointed out, amps can do weird things down low. Each sub design needs to be tested independently to provide a reliable basis of comparison. Link to comment Share on other sites More sharing options...
Hifisound Posted June 19, 2015 Author Report Share Posted June 19, 2015 I'll just say that the subject is quite complicated. A single distortion measurement with 100dB at 1m doesn't tell you much at all. Ricci's distortion measurements (on data-bass.com) are a lot more helpful because they reveal how distortion changes as the woofer approaches its limits. The trouble is that distortion depends on more than just the woofer. It depends on the enclosure too, and as Bosso Dave has pointed out, amps can do weird things down low. Each sub design needs to be tested independently to provide a reliable basis of comparison. My question was more about "FR matching" requirement before comparing distortion levels of different drivers... Link to comment Share on other sites More sharing options...
Hifisound Posted July 16, 2015 Author Report Share Posted July 16, 2015 Btw, isn't the THD measurement of DVC385 in the link almost like the THD measurement of UM18 / RSS460HO ? Its actually lower for DVC385, but its at 100dB, whereas the lowest lines for UM18/RSS460HO are at 105dB, so I assume both should be similar at 105 dB.. Isn't that surprising ? Link to comment Share on other sites More sharing options...
Hifisound Posted July 16, 2015 Author Report Share Posted July 16, 2015 Correction : The data-bass thd measurements are at 2m though, so 111dB measurement of dvc385 would be needed... In that case it could turn worse... Link to comment Share on other sites More sharing options...
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