JBL came to mind. I auditioned a new professional-grade JBL monitor and was not overly impressed. By chance, the next day, a pristine pair of ‘s came up. Here is a very superb pair of JBL Professional Monitors from the early 70’s. They are OWX enclosures which were used with several. JBL / L Professional Studio Monitors * Beautifully restored and upgraded Photo. Share |. Previous | Next. JBL / L Professional Studio.
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After refoaming woofers and making sure the crossovers are OK, you can turn around and sell two sets to leave yourself with one set free plus extra. At this point you call over the marketing guys with the golden ears and everyone has a listen. You needed to keep the networks driving impedance low otherwise the voltage at the compression driver would start to follow the ripple of the impedance curve and make the response worse.
I was keen to give a paper on the monitors. A solution for both was to use a series resonant bypass network. They took a vertical cross section designed for exponential area growth and rotated this cross section around an apex back in the throat in effect a radial swing.
With the by horn the polars are so consistent and the directivity index so flat that the on and off axis response looks just like the terminated kbl measurement of the compression driver. This is just my opinion and I do realize that a lot of great JBL speakers were designed contrary to this. At what axis do they sum best, and is 43330 where you want them to sum best?
See other items More Having a low flare rate but with inadequate mouth area will lead to choppy response in the horns first octaves.
When the woofer and network shape looks about right you have to see how the sections 4330. Studios typically build their main monitors into soffets over the control window and the was just too big. Special financing available Select PayPal Credit at checkout to have the option to pay over time. A cycle horn would grow half as fast with area doubling every 76 mm. The only real negative of the biradial horn designs was that the concentration on great polar response sometimes was at odds with the ideal mbl exponential area growth.
These were based on an Altecalways a popular unit, with a “time aligned” network and some enhancements to the horn.
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They 433 in production longer than any other JBL main studio monitor, being introduced in and not discontinued until for the and for the I came to JBL in September of If you look at the polar patterns that are in the AES paper we wrote you can jb, that the polars are incredibly uniform from Hz to 16, Hz.
Don had just started on a crossover network when I took over the project.
Thanks for the quick picture – very nice and mirror imaged too. I did most of the writing, although John Eargle corrected a lot of my grammar and finessed the introduction and my wife captioned the illustrations! Share This Page Tweet. Measured in this way most of the JBL compression drivers would have flat response from several hundred Hz to about 3kHz.
The item you’ve selected was not added to your cart. Visit eBay’s page on international jvl. I did most of the writing, although John Eargle corrected a lot of my grammar and finessed the introduction and my wife captioned the illustrations!
After getting the horns working the woofer section was tackled. BTW, welcome to AK! At this point we now have a system with all the sections working and giving a reasonable response curve. Also a lot of work to get the octave to octave balance right and also to insure the balance 430 the and were identical even though the was three dB more sensitive.
You might know that he had really pioneered the first constant directivity horns while at EV.
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At this point we now have a system with all the sections working and giving a reasonable response curve. The consequence was a periodic ripple in frequency response. The L-Pad, because it was bypassed, would only have effect from 1 to 5kHz. After getting the horns working the woofer section was tackled. Subject to credit approval. If you look at the impedance curve you see impedance peaks that correspond to the response peaks.
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Reasonable Price for 3 Pairs of JBL 4430’s
The only real negative of the biradial horn designs was that the concentration on great polar response sometimes was at odds with the ideal of exponential area growth. Il filtro per la biamplificazione: The44330 especially thewere very large and were sometimes referred to ironically as “Japanese bookshelf speakers”. I was pleased that the products were well respected by the Pro community and stayed in the line for a jbo time.
When you come back, you can make a new thread with the updates, correct model number, etc.