"Scrounged" horn-based DIY audio system playing Alone Together by Chet Baker.
HTML-код
- Опубликовано: 4 окт 2024
- Demo of my current "man loft" system: TOA ring slot tweeters, massive EV DH-1AMT midrange compression drivers on EV HR9040 (not "A") lenses, mid-70s Eminence entry level 15" PA woofers in Klipsch Lascala industrial split cabinets, 18" B&C pro cinema sub, Dayton DSP-408 digital crossover/signal processor, middle-aged Onkyo 7.1 AVR as 7-channel discrete analog power amp, Amazon Music HD as analog streaming source through old HP desktop, assorted interconnects of dubious progeny, recorded via a Dayton UMM-6 mic in sequential left and right passes (I only have one mic) captured/combined in Audacity. Yes, in person it sounds very much like this, but with "body slams" that can't be experienced with headphones.
Song is Chet Baker, Alone Together from the superbly recorded (despite high noise floor) eponymous album, offered as a "fair use" platform for demonstrating the characteristics of this sound reproduction system.
I'd love to find some ev9040
@@Michael-lg4wz They are worth seeking out. Everyone who hears mine are amazed by their natural sweetness, especially after applying modest EQ. Definitely a step up from the large radials of the period.
excellent I would love to hear this in person. Are you satisfied or do you plan to experiment further? I will sign up to keep up with any changes. Thanks for posting.
Woah, you are a celeb in my book and some of your posts were instrumental in my decision to acquire the EVs. Your approval is a vote of confidence! You can get more of the story at Hifi Haven forum, the thread is "A scrounger's journey in high efficiency land." I'll be sure to post more samples; this system seems to excel at everything and especially at well recorded voice, both sung and spoken. Cheers!
@@naturalverities sure is a small world. I am humbled but pleased that I could help in some way. I have gotten pretty good at lap top listening and though it cannot replace a personal audition I can tell that your system is sounding very very good indeed. I have many many decades of practice in critical listening with much time spent in voicing numerous products. Your Great White horns sound excellent. One thing I cannot tell for sure on my lap top is how wide your sound stage is behind the speakers and the exact depth is also difficult to judge. Is the stage uniform across its width? I have found that with critical set up and positioning you can make some very fine detail improvements in the stage and the detail resulting in improved 3D image.
At the present I am out of Province visiting my daughter and her two children. Most recently I have been helping my brother to refurbish and modify a 20 plus year old set of JBLSR mkll 4726a PA speakers. Believe it or not he is using them as home monitors in a small living room sitting very much in the near field and the results remind me more of a pair of Signature series ProAc Tablets or electrostatic panels. Modifications have been fairly limited with the cabinets having their seams re glued and some additional brace work and an extra 3/4" of Baltic birch baffle added and possibly another top layer of 3/4" mdf to follow and some fresh paint. The 2447 comp drivers are very good but they do have a hump about 11.5 KHz though that flattens out just off axis. The comp drives have had their back cups lined with Dynamat and a layer of magic eraser to damp the cavity. The 2381 horn is either a 90x40 or a 90x50 depending upon which JBL data sheet you look at but it is a very good sounding horn. The speakers have been placed up on custom made stands which are 12" tall. The horns have four 3/4" half rounds installed into the throats and a very thin layer of open cell on top of the bug screens. I have installed a set of Karlson tapers over both the woofer and the horn and the tapers are optimized for each. When I had done most of the work on the tweaking I had the opportunity to spend a few hours listening to a pair of JBL M2 and I was surprised at both how good they are and at how good a pair of twenty year old PA speakers cold sound ( a lot may well be in set up) they have much more in common than I would have thought but I don't mean to diminish the M2 rather I think it shows how good JBL quality and design is. The SR 4726a are a one seat sweet spot as was intended but either side of that on the couch is still very nice listening territory. Speakers vanish and everything short of deep bass is excellent and subs take care of that. So my brother is very happy and that was the goal.
I have been looking into building a set of clones of Don Keele Jr.'s CBT24 speakers but I have been getting over a series of health events that have me playing catch up. So any build won't be this year. I look forward to any updated you may make in your system. /thanks pr posting back.
@@morayjames92 Sounds like you are up to all kinds of mischief. I'm not in the least surprised that the JBL PA speakers are sounding good for hifi use, though I suspect they would do better yet with more breathing room. I'm blessed to have a 92m^2 listening space with low side and rear walls and pent ceiling, a superb acoustic, so whatever I listen to there is heard to best advantage. That said, the imaging/soundstaging I'm getting at present is the best I've ever heard from 2-channel in localization, directionality, and depth, and as spacious as the recording enables, sometimes extending a full 90 degrees to left and right. The sweet spot is both wide and deep, narrower up and down as the polar plots of the horn would predict. The result is a very satisfying and revealing level of detail if the recording is of high quality and not overprocessed. You may be surprised to read that I'm operating the Lascala cabs up to 700hz; most say that's beyond their range but it makes sense according to the 3 octave rule of thumb. 500hz works okay for the whales, but they only start to really sing higher up. Improvements would be to get another 1/2 octave of low bass (maybe a Fitzmaurice Table Tuba?) and to continue to smooth out the frequency response and tweak the driver delays. But most of the time I just listen with a big grin.
@@naturalverities you know you could get most all the top end sweetness you could ever want from a JBL 2435 which is also a 3 inch diaphragm made of berryllium. Probably would not have the same exit angle as a DH1A though. Just a thought.
@@morayjames92 I'd love to get my hands on a couple of those and audition them. But just one of them would likely cost more than my whole scrounger system! Also, I've tried the EV lenses as 2-way tops and their dispersion above 8k or so is not the best.
send me a mail address I will send photos of my recent work of jbl SR 4726a speakers. thanks.