Find great deals for JBL M Stereo Mono Variable Crossover Rack Mount. Shop with confidence on eBay!. This crossover was rack mounted and is in good working condition. New lower price!. Please add the letters JBL behind part numbers when ordering. Page 3. JBL M Page 4. JBL M Page 5. JBL M Page 6. JBL Page 7. JBL

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However, I have moved on, to bryston, and I havent looked back yet. Of course, 24db slopes, and higher, allow higher power to be used for compression drivers and tweeters, but, unless your doing HIGH POWER commercial sound, I don’t think this is a problem for you. Then, another thing to consider is the state variable filter frequency controls of the and output level attenuator pots. External ground link terminals for independent access to signal and chassis grounds, permitting greater flexibility in system grounding.

If you can get one cheap and spend some money to clean up the power supply caps and such, its probably fine, but if you want to upgrade from what you have – there are better crossovers around.

Electronics – M Series

All four devices incorporate Servo-Balanced outputs for proper gain matching and elimination of extemporaneous noise. By glen in forum Lansing Product General Information. Sometimes, its a bitch getting the EXACT setting you ubl when you futz with the trying to dial it in to sonic perfection.

High visibility 8-element LED metering. Thats older m525, and not as clean as the better designs of today. The one thing I will disagree with about current trends in filter technology today, is slopes, I like 12 and 18 DB slopes.

And I am basing this value solely on the estimated reduction of the power supplies ripple voltage. Another thing to point out, is that although the Urei can produce what I call a charming sound, hit it a bit too hard, you will hear the IC,s distort.

Outstanding dB dynamic range for lower noise, greater headroom, and unparalleled transient response. So, not knowing what amps, and speakers you have, I dont know what I would tell you as my 1 choice. External key inputs on each channel allows gate triggering from external sources. If you would like to talk further on the pro’s and cons of the what I think are the ,s strong and weak points, please feel free to PM me, I am happy to try to help!


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JBL M552 average used price

User adjustment of Threshold, Attenuation, M52 and Release controls. With just about EVERY speaker I, and my friend, who also does commercial audio, we just find 18db Butterworth filters allow us to create a much more seamless sound with 3 way or 4 way active setups. XLR input and output connectors. Still would be biamping? Originally Posted by pyonc.

If you have vintage speakers, that are less highly resolving, you might like the coloration the produces. See the attached pic That’s what I’ve been doing so far in driving my in a bi-amp mode. But, 18db Butterworth sums flat at unity, which I think sounds nicer. Sometimes, you lose the output on ch 1, ch 2, ch 3, etc, and a tap obn the faceplate brings it m55. The bottom line is that you want to sum flat through the crossover point so 50Hz on either side on the dial doesn’t really matter as long as you are flat through the transition.

I mean, if you have an excellent tweeter, and your crossover point is hz, you want it to be hz, not m5552, or changing drifting jnl it’s own. Have you seen Bo’s comments on his system? After some practice you can adjust by ear and get it real close.

You will also want to have the silver contact wafer switches cleaned. Some prefer the with the output m52 removed from the signal path, this may or may not be to your liking. That is a known problem with the Gate function with independent Threshold control for each channel.

Wide bandwidth, flat response; 10 Hz to 75 kHz. I just am not totally into digital crossovers at this time, but, at some point, I feel they will get it to the point where I believe digital crossover filters will become indiscernible, sonically, from the best analog filters.

As well as any frequency you desire can be dialed in, and the output level controls allow one to find those in between settings, unlike detented controls with their factory settings in 1DB increments. Originally Posted by Robh Servo-balanced outputs provide automatic jbp level adjustment to accommodate either balanced or unbalanced feeds.


IMHO, a “WORKED ” Ureiin the right system, can make some enchanting sounding vinyl playback, but, I’m telling you the known problems of the unit, as well as the fact that I feel that sound can be, and has been surpassed today, especially for digital playback of Cd and downloads.

You may want to consider better diodes high speed, soft recovery, Vishay diodes come to mind for the power supply rectification as well. If you see the pic, I currently set the crossover at the center bar, namely between and The spec is to crossover at Hz – but if you are worried about the diff between and Hz, you might want to use a scope and sig gen to be ubl of the setting accuracy of your front panel controls LF summing combines both channels for subwoofer applications where only one mono channel is needed.

Without having ever seen a urei schematic, upgrading from 1,mfd to 2,mfd caps should reduce the hum level by about 6. M Four Channel Noise Gate. I do not like 24DB slopes. And another question is, when ‘s in bi-amp mode, some say it’s better to set the crossover at HZ, rather than HZ.

All times are GMT The time now is If you have an RTA you can use that to determine where you are. The result is a system that delivers balanced power response across both the horizontal and vertical planes for superb coverage.

The had a nice sound, and with work, still does, IMO, BUT, know this, there are crossovers avaialble today that legitimately surpass that crossover in sonic traits. There is a row of yellow “Century” brand caps, I think these are film caps, and they can be upgraded to a better quality cap, will make an audible and positive difference.

If you find a mintI will be more than happy to pass modification info to you, and whatever assistance you want, to achieve the best you can get from the