tag:blogger.com,1999:blog-36956433.post7593883134527727801..comments2024-02-08T06:47:40.662-06:00Comments on DIY Audio Projects - Hi-Fi Blog for DIY Audiophiles: DIY Sealed Jordan JX92S Bookshelf SpeakerdiyAudioProjects.comhttp://www.blogger.com/profile/02982731963250878024noreply@blogger.comBlogger6125tag:blogger.com,1999:blog-36956433.post-77690486526089226392010-12-29T18:11:10.056-06:002010-12-29T18:11:10.056-06:00Hi Jive,
These JX92S are from a 2007/2008 run and...Hi Jive,<br /><br />These JX92S are from a 2007/2008 run and there are numerous forum posts that indicate they are different than the earlier Jordans like you used. I measured a Qts closer to 0.55 while the previous runs were reported closer to 0.4. So these should be a bit warmer in a sealed box. <br /><br />60Hz worked best for my room setup at the time as it balanced out the room modes.<br /><br />CheersGiohttps://www.blogger.com/profile/03486388071589524859noreply@blogger.comtag:blogger.com,1999:blog-36956433.post-36914329155544509062010-12-29T08:23:29.985-06:002010-12-29T08:23:29.985-06:00P.s. It was 2005 when I made mine. Here's a ...P.s. It was 2005 when I made mine. Here's a thread about it. You'll see that the "BSC-like" circuit was going to be a BSC, but it turned into something else. :-)<br /><br /><a href="http://www.diyaudio.com/forums/full-range/53247-jx92s-monitors.html" rel="nofollow"> Click for the sordid details.</a>Jive Dadsonhttp://www.diyaudio.com/forums/full-range/53247-jx92s-monitors.htmlnoreply@blogger.comtag:blogger.com,1999:blog-36956433.post-91686208094577306602010-12-29T07:42:25.514-06:002010-12-29T07:42:25.514-06:00Howdy. I built an almost identical system, in 200...Howdy. I built an almost identical system, in 2004 I think it was. Same size and brand of box, except I got the ones with straight sides. I don't think the curved sides were available at the time. I built it for an office, but I am using it at home now. I built the powered sub with a 10" Peerless XLS driver and matching passive radiator. Those passive radiators are getting hard to come by. Discontinued, I think.<br /><br />Some observations... <br /><br />The Jordan drivers are designed to be toed in. Works good that way.<br /><br />I did not use a BSC circuit at the office, because I was able to place the speakers on the walls, which is ideal. However I did include a BSC-like circuit in the box to remove a 5dB dip around 200Hz. From your measured response, it appears you do not need it.<br /><br />At home, the speakers are about three feet from the back wall. I can't help it. I compensate for the baffle step using a graphic equalizer. It requires about a 4dB shelf centered at 630Hz. <br /><br />I also use the EQ to boost the low end, +6dB at 60Hz and lower. That gives a flatter raw response for the crossover to work with. It's a 4th order Linkwitz-Riley, crossing over to the sub at 80Hz. I actually have separate EQ's on the mains and the sub. (It's an accident of history that I have the two EQ's, but it works real good.) If you are not boosting the low end of the mains, I think 60Hz is much too low a crossover point. If I were not using the EQ to boost 60Hz and below, I would cross over at 120Hz rather than 80.<br /><br />One more thing. Have you rotated those bolts 90 degrees yet? :-)Jive Dadsonnoreply@blogger.comtag:blogger.com,1999:blog-36956433.post-49579291207408882482009-10-30T07:18:44.521-05:002009-10-30T07:18:44.521-05:00hello:) i play harp and violin :)hello:) i play harp and violin :)bluenotehttp://www.mongrel007.webs.comnoreply@blogger.comtag:blogger.com,1999:blog-36956433.post-31505756363237522072008-07-06T11:40:00.000-05:002008-07-06T11:40:00.000-05:00Hi Jeff, I assume you are asking about the FX120. ...Hi Jeff, I assume you are asking about the FX120. Personally, I like the FX120 better, but that is likely a matter of personal taste. Everyone else who has heard the two at my place prefer the JX92S. <BR/><BR/>The sealed JX92S makes almost as much bass as a larger and ported FX120. The JX92S can actually move some air and still sound good.<BR/><BR/>CheersdiyAudioProjects.comhttps://www.blogger.com/profile/02982731963250878024noreply@blogger.comtag:blogger.com,1999:blog-36956433.post-6593477300744387212008-07-05T20:49:00.000-05:002008-07-05T20:49:00.000-05:00Hello! Which do you prefer the sound of, the Jorda...Hello! Which do you prefer the sound of, the Jordan in the sealed or the Fostex project in your blog?<BR/><BR/>JeffZillahttps://www.blogger.com/profile/11229271084884975168noreply@blogger.com