tag:blogger.com,1999:blog-7984778625978437479.post5972794784617736199..comments2024-03-16T00:37:36.942-07:00Comments on M.R.O.: Heir Audio 4.AiRin Choihttp://www.blogger.com/profile/01033604846161090040noreply@blogger.comBlogger19125tag:blogger.com,1999:blog-7984778625978437479.post-27022942485792234332013-05-03T04:19:32.036-07:002013-05-03T04:19:32.036-07:00Thanks for this analysis! That deep-null is very i...Thanks for this analysis! That deep-null is very interesting. I believe it is the reason why some say the sound is disjointed. However, there are many others who say it is quite linear and only slightly warm,possibly unaware of the dip. <br /><br /> Heir actually released a new series, the dual-driver "Tzar". The 350 ohm version in particular is touted to be very "neutral", and is said to have a peak slightly lower than that on the ER4S. Wonder if that doesn't have the issues of the 4ai.Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-7984778625978437479.post-23339138993207827602012-11-03T11:42:16.588-07:002012-11-03T11:42:16.588-07:00Aah. :o(Aah. :o(Anonymoushttps://www.blogger.com/profile/04542028675480009685noreply@blogger.comtag:blogger.com,1999:blog-7984778625978437479.post-22041475753014137972012-11-03T04:57:36.789-07:002012-11-03T04:57:36.789-07:00Good point. But as I said, I thought that email ad...Good point. But as I said, I thought that email address was of Heir Audio, not a Head-Fi user. LOLRin Choihttps://www.blogger.com/profile/01033604846161090040noreply@blogger.comtag:blogger.com,1999:blog-7984778625978437479.post-87081026448780755982012-11-02T22:48:14.365-07:002012-11-02T22:48:14.365-07:00... but why didn't you send me a PM on Head-Fi...... but why didn't you send me a PM on Head-Fi then?Anonymoushttps://www.blogger.com/profile/04542028675480009685noreply@blogger.comtag:blogger.com,1999:blog-7984778625978437479.post-63784395280959535622012-11-02T18:02:47.863-07:002012-11-02T18:02:47.863-07:00I don't know. You did spell my email address p...I don't know. You did spell my email address properly. :o(Anonymoushttps://www.blogger.com/profile/04542028675480009685noreply@blogger.comtag:blogger.com,1999:blog-7984778625978437479.post-60874026108371243822012-11-01T01:43:40.380-07:002012-11-01T01:43:40.380-07:00Thnx for making things clear. As you can see here:...Thnx for making things clear. As you can see here:<br />http://i.imgur.com/EN0dG.jpg<br /><br />I have sent the opt-in request twice. Hmm.. <br />What could've possibly caused the trouble? Rin Choihttps://www.blogger.com/profile/01033604846161090040noreply@blogger.comtag:blogger.com,1999:blog-7984778625978437479.post-65164063221328890542012-10-31T23:26:13.427-07:002012-10-31T23:26:13.427-07:00No, actually, they didn't choose me. I was the...No, actually, they didn't choose me. I was the one who contacted them to suggest the tour. So I chose them. :oP<br /><br />The aim of the tour, for Heir Audio, is simply to allow people to try their IEMs and provide feedback to other people.<br /><br />I listed reviews in the thread I started:<br /><br />http://www.head-fi.org/t/625466/heir-audio-world-tour#post_8662093Anonymoushttps://www.blogger.com/profile/04542028675480009685noreply@blogger.comtag:blogger.com,1999:blog-7984778625978437479.post-88785811865974201732012-10-31T11:58:50.306-07:002012-10-31T11:58:50.306-07:00This comment has been removed by the author.Anonymoushttps://www.blogger.com/profile/04542028675480009685noreply@blogger.comtag:blogger.com,1999:blog-7984778625978437479.post-54009026200243800002012-10-31T11:07:19.609-07:002012-10-31T11:07:19.609-07:00It's odd how that occurred, but it doesn't...It's odd how that occurred, but it doesn't matter either way, I went over to Rin's place to fill in the gap. <br /><br /> Even though you don't work for Heir Audio, they did choose you to organize This right? If so, good choice by them as you have been doing an excellent job organizing this. The email confusion is a thing of the past now, I think there are better things ahead. <br /><br />I do applaud Heir for letting these go out on tour. I hope it's a learning experience for them and take pointers, as there are certainly things to improve on. I do hope that was partly one of the reasons for the tour, to see where things can be improved based on 3rd party criticism. Inkshttps://www.blogger.com/profile/09737879960681531583noreply@blogger.comtag:blogger.com,1999:blog-7984778625978437479.post-61892744558189482452012-10-31T07:59:48.957-07:002012-10-31T07:59:48.957-07:00Actually, you must have sent them to *my* inbox, s...Actually, you must have sent them to *my* inbox, since I was the person (not working for Heir Audio) organizing the Heir Audio World Tour:<br /><br />http://www.head-fi.org/t/625466/heir-audio-world-tour<br /><br />And you *were* included in the list, at Inks's request, but I did need confirmation from you directly, and no, I never received it (even after sending several reminders to Inks). I waited for three weeks after I'd received the last of the other participants' confirmations, then I had to give up and launch the tour without you. <br /><br />So Heir Audio has nothing to do with it: I was the one "choosing" the participants (I actually chose about half, the others being Head-Fiers Shotgunshane suggested because he had already been in other such tours with them and thus trusted them). And I state it again: I never received your emails; I even checked my spam folder, at the time.<br /><br />Pierre-Alexandre<br />www.sicart.infoAnonymoushttps://www.blogger.com/profile/04542028675480009685noreply@blogger.comtag:blogger.com,1999:blog-7984778625978437479.post-91674030076089183692012-10-31T07:58:42.719-07:002012-10-31T07:58:42.719-07:00This comment has been removed by the author.Anonymoushttps://www.blogger.com/profile/04542028675480009685noreply@blogger.comtag:blogger.com,1999:blog-7984778625978437479.post-14288494671468697892012-10-31T03:20:37.304-07:002012-10-31T03:20:37.304-07:00International standards recommend the reference fr...International standards recommend the reference frequency to be @ 500 Hz, of which the acoustic input impedance of a human ear canal starts to kick in. I can do that too, but sometimes headphones, especially multi-driver ones, tend to have a lot of deviation in the lower frequency range. Thus, I can say such normalization @ 1 kHz is more for the readers' convenience.Rin Choihttps://www.blogger.com/profile/01033604846161090040noreply@blogger.comtag:blogger.com,1999:blog-7984778625978437479.post-90040943928747162052012-10-31T03:04:24.091-07:002012-10-31T03:04:24.091-07:00I've always wondered why measurements are alwa...I've always wondered why measurements are always equalized to 1k. What is the use for that, other than for convenience? The highest hair cell density isn't there. Perhaps musical instruments overlap the most there.Tomhttps://www.blogger.com/profile/08477188700481503939noreply@blogger.comtag:blogger.com,1999:blog-7984778625978437479.post-55387114066550962492012-10-31T02:33:00.893-07:002012-10-31T02:33:00.893-07:00First, we need to understand how our hearing syste...First, we need to understand how our hearing system functions according to the equal-loudness contour. Simply listening to a sample tone through an uncalibrated level does not yield anything valid.<br /><br />Second, that is a typical TWFK behavior, when it is measured slightly away from the reference plane, although the insertion depth issue is not big of a deal with a TWFK to begin with. Interestingly, the insertion depth I utilized in this analysis is all the way up to the reference plane. Thus, I suspect it is due to the physical phase offset correction done by the manufacturer, placing TWFK further away within the housing.<br />Rin Choihttps://www.blogger.com/profile/01033604846161090040noreply@blogger.comtag:blogger.com,1999:blog-7984778625978437479.post-24424958709984566922012-10-31T02:26:28.614-07:002012-10-31T02:26:28.614-07:00Since the insertion depth deals mostly with the ha...Since the insertion depth deals mostly with the half-wavelength resonance of the simulator, whether pushed forward or backward, that notch will always be there.Rin Choihttps://www.blogger.com/profile/01033604846161090040noreply@blogger.comtag:blogger.com,1999:blog-7984778625978437479.post-40405764238065719692012-10-31T01:58:04.677-07:002012-10-31T01:58:04.677-07:00If this is a case of the resonant peaks getting pu...If this is a case of the resonant peaks getting pushed forward, would it make a 3k difference? It still doesn't make sense to me.Tomhttps://www.blogger.com/profile/08477188700481503939noreply@blogger.comtag:blogger.com,1999:blog-7984778625978437479.post-18476525712811084882012-10-31T01:55:01.649-07:002012-10-31T01:55:01.649-07:00I didn't say anything about the 4k notch. I kn...I didn't say anything about the 4k notch. I know it's there. I can hear it.<br /><br />Yes, and it's also apparent that there's channel mismatch.<br /><br />The point is, if I play a tone a 1k, and then a tone at 12k, with the ER4P and 4A volume-matched at 1k, the 4A will sound louder at 12k than an ER4P.<br /><br />Also, I thought the TWFK dropped linearly from 10k to 16k, not a fast drop from 10-12k, and then a small rise. Why's it normal behaviour? I've never seen it do that before, not in high end customs, nor in the B2/DBA-02/R-50/UE700.Tomhttps://www.blogger.com/profile/08477188700481503939noreply@blogger.comtag:blogger.com,1999:blog-7984778625978437479.post-10257914842980906982012-10-30T15:56:17.169-07:002012-10-30T15:56:17.169-07:00Unless intended by the manufacturer, there is a cr...Unless intended by the manufacturer, there is a crossover network frequency mismatch between the woofer and the tweeter, just like the ones you can see on bookshelf loudspeakers of some mini stereo systems. On top of that, the notch on the right channel is actually deeper, which means this IEM has not been pair-matched.<br /><br />And that is how TWFK usually behaves in the upper frequency range, Nothing abnormal there.Rin Choihttps://www.blogger.com/profile/01033604846161090040noreply@blogger.comtag:blogger.com,1999:blog-7984778625978437479.post-76653789779250217402012-10-30T11:32:06.891-07:002012-10-30T11:32:06.891-07:00The 10 kHz cliff strikes me as confusing.
I have ...The 10 kHz cliff strikes me as confusing.<br /><br />I have a 4.A (full custom), and it sounds brighter than an ER4P to me, even up in 12 kHz...<br /><br />Is there something else going on, as I fail to see how its crossover setup would yield such a type of ultra-high frequency shelving. A normal TWFK-30017 with a high pass RC filter and a white 680 ohm acoustic filter simply does not behave that way.Anonymousnoreply@blogger.com