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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Wide bandwidth, flat response; 10 Hz to 40 kHz. Results 1 to 6 of 6. Complete user control over Threshold, Attenuation, Attack and Release controls. When dramatically increasing the size of the power supply capacitors, it is certainly a good idea to also increase current handling capacity of the rectifier diodes. But, it is coloration, for sure. After some practice you can adjust by ear and get it real close. I find 24Db to not have quite enough overlap between filter bands, sometimes 12db too much.

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 jb, become indiscernible, sonically, from the best analog filters. Thats older tech, and not as clean as the better designs of today. Originally Posted by Robh Servo-balanced outputs provide automatic output level adjustment to accommodate either balanced or unbalanced feeds.

You may want to consider better diodes high speed, soft recovery, Vishay diodes come to mind for the power supply rectification as well. I, personally, m5522 been a long time urei user, AND I loved it back in the vinyl days.

JBL M552 average used price

Power supply, mfd axial 25v caps stock, good to upgrade to an axial mFd 50v cap, there are three to replace. Subsonic filtering for protection of low frequency transducers from over excursion. Extremely low distortion; THD 0. 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.


IF you increase the output gain, there are thru holes for additonal disc capacitors in the quad IC feedback loops, stock units have four 33pf caps, and two for the last TLO84 IC, upgrade by adding the additional caps in the the trhu holes already provided, same value.

So, if you are going to change the caps, then change the diodes as well. Wide bandwidth, flat response; 10 Hz to 75 kHz. Without mods I can hear ScottyJ coming down the hall already Outstanding dB dynamic range for lower noise, greater headroom, resulting in unparalleled transient response.

Advice on JBL M crossover.

JBL M average used price – Audiofanzine

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.

If you have vintage speakers, that are less highly resolving, you might like the coloration the produces. Wide bandwidth, n552 response; 10 Hz to 50 kHz.

So, not knowing what amps, and speakers you have, I dont know what Jjbl would tell you as my 1 choice. See the attached pic That’s what I’ve been doing so far in driving my in a bi-amp mode.

LF summing combines both channels for subwoofer applications where only one mono channel is needed. Thanks a lot for your feedback and advice.

JBL M552 Stereo Mono Variable Crossover Rack Mount

Immeasurable lower than noise floor. Outstanding dB dynamic range for lower noise, greater headroom, and unparalleled transient response. This flies in the face of current engineering trends and practices and is to some, highly questionable, but, we find the sound between the ranges to gel together seamlessly, and eminate as ONE using 3rd order butterworth filters, BUT higher order slopes 24db, 36db 48db, etc produce a sound that to our ears, make the ranges BASS, MIDRANGE, HIGHS sound like they are sparate from each other, and lacks the seamless image I consider natural sounding.


All times are GMT You don’t need to engage the divide by 10 switch. Model SC8 Security Cover. However, this is also VERY dependent upon your speakers and their design.

Without having ever seen a urei schematic, upgrading from 1,mfd to 2,mfd caps should reduce the hum level by about 6. I have found that although my modded ,s have an enchanting sound for analog, vinyl playback, it is NOT always the best when it comes to playing Jbp.

What do you think? XLR input and output connectors. Stock, its untity gain in and out. Thanks for your kind reply. Yet still another known problem, most ,s had waffle IC sockets, so, the IC plugs into the socket, and these can be intermittent. 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.

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. Originally Posted by Baron Extra Tabs by vBulletin Hispano.