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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See the attached pic That’s what I’ve been jnl so far in driving my in a bi-amp mode. Thats older tech, and not as clean as the better designs of today.

Electronics – M Series

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. TODAYS top quality crossovers, like Bryston, have selectable slopes, and the m552 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. Better than dB unweighted. Originally Posted by Robh 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 I do not like 24DB slopes.

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What are your thoughts on this unit? But, 18db Butterworth sums flat at unity, which I think sounds nicer.

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.


Have you seen Bo’s comments on his system? M Series Brochure Adobe Acrobatkb. Noise Gate Control Ranges: Results 1 to 6 of 6. That is a known problem with the Fantastic power supply, discrete circuitry, and high quality components, with superb engineering at work here. External key inputs on each channel allows gate triggering from external sources.

All four devices incorporate Servo-Balanced outputs for proper gain matching and elimination of extemporaneous noise.

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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. Subsonic filtering for protection of low frequency transducers from over excursion.

External ground link terminals for independent access to signal and chassis grounds, permitting greater flexibility in system grounding. Greetings- I ‘ve been using a JBL M electronic crossover for biamping my s for about the last two years and have been quite pleased with the results.

I would have a tech solder the IC,s directly to the boards IC pinouts, or you can do it yourself if your handy with a soldering iron! All times are GMT User adjustment of Threshold, Attenuation, Attack and Release controls. Yet still another known problem, most ,s had waffle IC sockets, so, the IC plugs into the socket, and these can be intermittent. Complete user control over Threshold, Attenuation, Attack 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. However, this is also VERY dependent upon your speakers and their design. And another question is, when ‘s in bi-amp mode, some say it’s better to set the crossover at HZ, rather than HZ.


Earliest JBL crossover with hi-frequency level control? Originally Posted by pyonc. Advice on JBL M crossover. What do you think? The other thing about 24db slopes, is they are acoustically in phase at crossover point, 18db is considered out of phase at crossover point. Extra Tabs by vBulletin Hispano. If you have an RTA you can use that to determine where you are.

By glen in forum Lansing Product General Information. Sometimes, you lose the output on ch 1, ch 2, ch 3, etc, and a tap obn the faceplate brings it back. The one thing Kbl will disagree with about current trends in filter technology today, is slopes, I like 12 and 18 DB slopes. Extremely low distortion; THD 0. Results 1 to 8 of 8.

ibl RF filtering to defeat extraneous noise and ultrasonic oscillations. During start up the initial surge current will be higher with the much larger capacitors, which could potentially over load and fry the original rectifier diodes. 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.

DSP crossovers also have the option of selectable filter types as well.