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I do have a spare pair of coaxial drivers - I may take one and make a center channel from it - Overkill, I know, but so far it hasn't been needed. Originally Posted by Mr. I think if it was my room, I'd take one of the rears and put that into Center service and use a pair of small "whatevers" for the surrounds. I just think the Center is far more important than the surrounds.
We hear in front of us much better than we do to the side or rear You could certainly give it a try to see what you think. A pair of anything decent I just re-foamed a pair of these myself. I loved it, the twin spiders hold the cone straight, making for the easiest re-foam I've ever done. I love the idea if using the chair as speaker stand Originally Posted by fotodan. Attached Images.
Karlson Cabinets for the helper Woofers.. They came from a collector a Karlson Kab Kollector?? Anyway, I pulled the grill cloth yesterday and wiped the outer sides down with Orange oil - not sure what I'll do to the unfinished curved panels - the wood veneer has a very nice grain Cherry stain?
Danish Oil? Something light to accent against the dark stain on the cabinet. I heard Karlsons are supposed to do bass well - and I do like the look of the karlson panels Cutout hole is 12" but the cab dimensions could work with a 15". Looks like it'll be fun! Interested to hear your opinion of how they sound once you get them done. Those are Groovy! Yes, I heard some tales of Karlson's doing an amazing job with bass.
Unfortunately the only pair I ever heard had some crappy EV's that didn't work well in the box. I am very interested to hear your thoughts, once they are up and running. The opinions I've read over the years about the Karlson speakers range all over the map, from "best I've ever heard" to "worst I've ever heard", but I believe those referred to them doing full-range duty.
Very interested to hear how they do when limited just to bass. Originally Posted by hsosdrum. Okay, I did some staining of the Karlson curved panels. Seems a good match. I cut a hole in the bottom for a pair of JBL speaker connector cups, then moved the woofers and chokes from the old "blonde wood" cabinets into the Karlson cabinets.
Brett Member. Re: Cheap is betterrrrr Ricren said:. Some measurements I just made a couple of fast and dirty mesurements of the speakers. For reference, they are instaled flush mounted in a wood wall. The readings was taken with an Earthworks TK30 presitiion microphone into a Milennia Media pre going into an Motu 24 bit audio interface and Spectrafoo. First I measured the response of the amp taking the signal directly from the speaker terminals: Table flat.
Then I measured one speaker and then the other. Amazingly they measured more or less the same. Here's the curve: And the hiped low end, an effect described in the Urei manual caused by the flush mount technique. I use a digital eq between the mixer and the amp, but for this measurements It was out, of course. Gen curve I can add that the speakers were tested a month ago at the JBL local representative. Urei was bought by JBL many years ago.
They changed the woofer suspension foams they were de-integrating badly and cheked the drivers. They say they are ok. But they did not test the crossover. They were clean and emerged from this test Ok. I could say that they were not abused during these years. For comparisiion, I run a test on the Genelcs and this is the curve. Next test? I accept suggestions. I think I could measure each driver separately without the crossover. Re: Some measurements Hi, Ricren said:.
I just made a couple of fast and dirty mesurements of the speakers. Ok Ricren, first thoughts on the graphs. I suspect that a previous owner was unhappy with the top end roll off, and tried to compensate by turning up what is left. You could rebuild, as Kuei suggests, and that would probably be worthwhile, as the crossovers will be getting very tired after 20 years in a studio working.
But what I would suggest, as you are a commercial enterprise, your local pro audio dealers would be more than likely to lend you some demo crossovers, and you could try bypassing the passive XOs, and see if you like the results. If this improves the basic sound to something you and your clients like, and can work with, then you can think about adding a super tweeter to sort out the high end roll off.
Hi, I do appreciate your attemps to measure the performance of your speakers, but do you actually sit in 1m distance from them? For my personal take, give me a decent 50W Valve amp and a pair of "original spec" or better or 's and I'll be jolly happy. Give me a pair of Genlec or active Dynaudio's and I retch. But what I would suggest, as you are a commercial enterprise, your local pro audio dealers would be more than likely to lend you some demo crossovers,.
Sumertime break So apparently I'll have one week break on the booking of the mix room between projects, so it's time to dig deeper on the Ureis. First I extracted one coaxial driver from the right channel and unsecured the crossover board to thake a look.
Notice the distance between voice coils of the two drivers. Someting like 12 centimetres! Now I realize why the Urei people were so heavy into highlighting the time align feature of these monitors. Without it, this thing would sound really bad. Tomorrow a fellow sound enginneer will come to take some measures with Smaart. I'll post the results. By the way, how do you include more than one image in the same post? A few measurements finally: Gear used: Smaart sound test software with a TK30 earthworks condenser microphone.
First test was to measure the tranfer function of the crossover board. An 8 ohms resistor was used to load the output instead of the speaker. The first thing you do in smaart is to measure the time delay. It revealed a delay on the woofer output of 0.
The dealy on the horn side was 0. I apologise for the fuzzy images, but Smaart was running on a laptop PC and the guy did not know how to transform the screens in a graphic format that I could pick, so I just taped the screen with a camcorder.
I'm used to do screen dumps all the time in Mac computers using shift-command-3 to get a pict document. How can you do it in a PC? Surely it's a way. More tests soon. Cheers, Ric. Urei for sale Hi, I have a pair of Urei speakers, they were in my studio for some years and are still in great condition.
A couple of years ago i changed my monitoring system to an active JBL set up and stored my s away. Would anybody be interested in having these speakers of me, just make me an offer. This site would be better then EBay i think.
Thanks for your time. Grant Bedford UK. Robh Member. The drivers in the are JBL's not Altecs. Compression driver is a and the Woofer is a modified Same exact componenets as a JBL in a different set-up. Looking at your curves something not right as the can get you out beyond 16k. Are there stock diaphrams or aftermarket on the compression drivers??
Stock Hi Rob, They are stock ones. I bought the speakers new in and never changed the horn diaphragms.. You suspect could be something bad with them? I did change the woofer suspensions, however. I never abused them in any way, used indoors at my Tv post studio as the "middle-big reference speaker". Meaning that most of the time they were off, because we use to mix tv material with little speakers and occasionally we check with the big ones.
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Refurbishing an old Urei monitor speaker. Thread starter Ricren Start date am. Jump to Latest. Ricren Member. HI folks, I have a pair of Urei coaxial speakers. They were well regarded in their age 20 years ago but now, I feel that they are sounding old for today standards. They are coaxial speakers with a 12' woofer from Altec and a distinctive blue horn driver.
They have a very complex passive crossover with a "time align" feature. They delay the woofer some nanoseconds. Problems: 1-Lack of "definition": I like the punch of the new biamped designs like Dynaudio and Genelec. I'm aware that I'll have to time align the system but I think is worth it.
Can anybody suggest a nice tweeter to complement this system? As the system is going to have an active crosover with separate amps for the drivers, I asume there is no need to get a tweeter that matches the efficiency of the horn. Am I correct? Thanks for any advice on this. Cheers Ric. More options. Hi, Ricren said:. I have a pair of Urei coaxial speakers. Click to expand So I'm considering to retire the passive crossover and triamp them, adding a tweeter to cover the zone from 5K to 20K.
Urei story First at all, let me tell you what the complete Urei speakers story is, I was moderatly happy with the Ureis in my 3. Then I bought a pair of Genelec The Genelecs are little biamped two way speakers with a 6" woofer and 1" tweeter in a tuned box, not sealed. Things that were not there before apeared.
Articulation was exelent, no distortion, clear mids. Of course no bigl bass, they are 6" speakers after all. I think the main difference is the treble extension and the absence of distorsion and that is what I want to fix on the 's side if it's possible, of course. You could say that if I like the Gens so much why not to buy a pair of big ones and forget the Ureis? Way out of my range. Now I honestly ask-from my ignorance in the high art of speaker design: Can I do something meaninfull to fix the Ureis?
And Mr Wang, I'm not joking. It's just that I'm not a speaker designer, so I humbly come here to ask to the people that realy know. That the only wat to learn, right? So, what is a bullet tweeter and why is better than the ? That, and a few other things, I'd really like to know.
Hi Ric Don't mind our friend Kuei, he gets a bee in his bonnet about certain things , but he is also well worth listening to on other occasions. I did think you might have chilled out now you have a new interest in life though, Mr T As you are audio aware, to help diagnose the problem you have it would be worth measuring the response of your speakers, a cheap computer mic and shareware FFT prog will do the trick , and then we can work out what may be going wrong and how to implement a solution.
You may want to look at this Morel tweeter though as a possible option, it means you could keep your cabinets stock, and not damage the resale value. Re: Urei story Hi, To make this simple. The Crossover on the tweeter section contains two trim pots. They will loose contact over 20years. Some of the capacitors are likely bipolar electrolytic and thus will have aged and be out of spec.
The wire in those days was stranded copper and it will likely have oxidised. Drivers age too, the woofers suspension may have hardened or gone loose and the magnets may have lost strength especially if the speakers where played at high level. I am not saying that any of the above is invariably the case, but chances are good that some items at least are amiss. Also as, mentioned, the settings of the two trim pots strongly influence the frequency response and hence sound.
Also, your Amp on the Ureis may be apst it's prime electrolytic capacitors should be changed every 3 - 5 Years to make sure they do not age and end up out of specification. I know the small Genlecs. Not my cup of tea. Compressed, lacking in low end and SPL capability and that is from a home viewpoint, never mind studio.
The main advantage over dome tweeters is amuch better top end, transient response, sensitivity and sound. Later T. Cheap is betterrrrr So this Fostex bullet thing is better than the SS ? That's bucks cheaper than the SS. Thinking about ordering a couple. I'll follow Pinkmouse suggestion to conduct some tests with the proper equipment to see exactly what's going on and I'll report back.
Brett Member. Re: Cheap is betterrrrr Ricren said:. Some measurements I just made a couple of fast and dirty mesurements of the speakers. For reference, they are instaled flush mounted in a wood wall. The readings was taken with an Earthworks TK30 presitiion microphone into a Milennia Media pre going into an Motu 24 bit audio interface and Spectrafoo. First I measured the response of the amp taking the signal directly from the speaker terminals: Table flat. Local Pickup. Free Local Pickup.
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