![]() All I have shown are measured spectra on 2 speakers under same conditions, only 4 significant plots shown from a huge number collected. I know Earl Geddes work and papers very well and I have never spoken about THD as a single number as being much important. And I don't expect manufacturers to be helpful in this regard either, as the current trend of trying to get the lowest bass extension out of the smallest box possible runs contrary to that design goal, putting them at a fundamental disadvantage, so they're probably happy no reviewers actually push the capability (or lack thereof) of the speakers they're reviewing. So that's a good reason for it, but not a solution. If a certain reviewer gets a reputation for sending back speakers with blown tweeters, manufacturers will stop sending speakers to him. I can understand why reviewers don't do it. The Pro Audio side of the industry does a better job of providing this data, but most consumers never give such speakers much consideration. Sometimes a max SPL is given in the specs, but I'd venture to guess the vast majority of consumer speakers start really sounding like crap long before they reach the number listed in their specs. People are left to look at the sensitivity and max power handling, do a little math and make a guess. This really leaves the consumer blind to a pretty important aspect of a speaker's performance. Nobody in the industry seems to do reviews of speakers which include distortion and compression testing at high volumes to determine the maximum "usable" SPL of which a particular speaker is capable. Not with Amir specifically (the spin data is so much more valuable and difficult to get, I'd be happy if that was all he spent his time focusing on) but more for the industry in general. But who cares about listening, we want data.Ĭlick to expand.While I'm not sure your methodology was the most appropriate, and I would note not only Amir's measurements but often his listening tests mention when speakers can't get loud and/or start sounding like crap when they do, I do sort of agree with your premise. The speaker distorts as a hell at lower frequencies and it is audible even in the second room where is my PC and measuring SW. 1W should be fine for a unit that has “Power Capacity” of 150W, isn't it? No, it is not fine. Both speakers were measured from the same distance. (1W for JBL), at 100Hz sine and 200+300Hz twin tone to see IMD at lower frequencies. ![]() So I made a test at 2Vrms output amplifier voltage approx. ![]() ![]() 6.5” is still a very small woofer, but let's see the measurements.įrequency Response (+/- 3 dB): 100 Hz - 18 kHz Does it make a difference? Yes, a huge one. Two speakers were compared in distortion in higher bass region, CNO-T25 2-way small floor-standing project by Troels Gravesen,ĬNO-T25 has 6.5” Seas W18NX001 woofer/midrange driver, though JBL has a 4” driver. Really? As this forum is not interested at listening impressions at all, only in measured facts, I am posting some facts. And we often read that nonlinear distortion of speakers is unimportant and the only important parameter is frequency response, on axis of axis at different angles etc., in other words power response. We can see plenty of measurements of very small monitors here at ASR, in last weeks. Is nonlinear distortion of (small) speakers unimportant?
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