JBL M552 PDFMarch 5, 2022
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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Subsonic filtering for protection of low frequency transducers from over excursion. The time now is Results 1 to 6 of 6.
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 sure of the setting accuracy of your front panel controls As well as any frequency you desire can be hbl 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 don’t have an RTA just go with what sounds best to you.
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DSP crossovers also have the option of selectable filter types as well. Some prefer the with the output transfomers removed from the signal path, this may or may not be to your liking. I would anticipate jlb audible difference.
What are your thoughts on this unit? You could use silver mica disc caps, said to be superior.
JBL M Stereo Mono Variable Crossover Rack Mount | eBay
LF summing combines both channels for subwoofer applications where only one mono channel is needed. 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 m5552 you are flat through the transition.
Have you seen Bo’s comments on his system? I, personally, have been a long time urei user, AND I loved it back in the vinyl days. High visibility 8-element LED metering.
Came running from down the hall, thanks Grumpy! 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, ,552 value.
Gain, both input and output IC feedback loop resistors should be changed to increase available gain, how much is the question! You don’t need to engage the divide by 10 switch. But, it is coloration, for sure. Wide bandwidth, flat response; 10 Hz to 50 kHz. Advice on JBL M crossover. However, this is also VERY dependent upon your speakers and their design. All times are GMT 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.
TODAYS top quality crossovers, like Bryston, have selectable slopes, and the dsp crossovers have 6,12,18,24,36,48, and 52 db slopes, as well as one dsp unit having db brick wall linear phase filters available. Earliest JBL crossover with hi-frequency level control? 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.
But, 18db Butterworth sums flat at unity, which I think sounds nicer. 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. Results 1 to 8 of 8. Yet still another known problem, most ,s had waffle IC sockets, so, the IC plugs into the socket, and these can be intermittent.
Extra Tabs by vBulletin Hispano. Gate function with independent Threshold control for each channel. 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.
Ibl lower than noise floor. Wide bandwidth, flat response; 10 Hz to 75 kHz. So, not knowing what amps, and speakers you jbll, I dont know what I would tell you as my 1 choice. Thanks a lot for your feedback and advice. And another question is, when ‘s in bi-amp mode, some say it’s better to set the crossover at HZ, rather than HZ. So, if you are going to change the caps, then change the diodes as well.
The other thing about 24db slopes, is they are acoustically in phase at crossover point, 18db is considered out of phase at crossover point. Stock, its untity gain in and out. During start up the initial surge current will be higher with the much larger jbp, which could potentially over load and fry jb, original rectifier diodes. 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!
That is a known problem with the 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 m5552 playing CD. User adjustment of Threshold, Attenuation, Attack and Release controls. And I am basing this value solely on the estimated reduction of the power supplies ripple voltage.