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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The L-Pad, because it was bypassed, would only have effect from 1 to 5kHz. Directivity jl represents the on axis gain. Probably the best known examples 430 the Altec and SpeakerLabFanOct 26, Fu grazie alla sua assicurazione di This ignored the fact that the combinations could only be flat, and only on axis, if the horn exhibited a great amount of high frequency beaming.
I remember that there was a lot of work to get the midrange and tweeter controls to work sensibly. You might know that he had really pioneered the first constant directivity horns while at EV. The price is for one set 4 pieces.
A passive network can equalize that as long as the inherent sensitivity stays high enough to the highest frequency needed. The consequence of the ripple was a slight coarsening of the sound of the midrange, most noticeable on pink noise.
Get the item you ordered or get your money back. After getting the horns working the woofer section was tackled. If you look at the hbl curve you see impedance peaks that correspond to the response peaks. If you look at the polar patterns that are in the AES paper we wrote you can see that the polars are incredibly uniform from Hz to 16, Hz.
JBL 4430 Floorstanding Speakers
Studio monitor tre vie con woofer da 38cm mod. Directivity index represents the on axis gain.
They are listed as a lot, so they will be sold all together unless it is requested they be split up. At the time JBL had a good line of studio monitors including thethe and the a product I much admired.
Add to watch list. There were a number of listening sessions with Gary Margolis and John Eargle which I, as a young engineer, found very instructional. 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. Altec made thinly veiled copies with their “Manta Ray” horns. Since they were the first to use a constant directivity horn there was some merit to a paper and so I received permission to write it.
Delivery times may vary, especially during peak periods. Back in the acoustical gramophone days mathematicians had figured out that Exponential area growth gave the most extended acoustical load to the transducer. Yep, here’s hoping he is occupied with moving all those big junky old speakers. The biradial horns were the answer and they were extremely good. Fit for JBL Pro series loudspeaker.
Learn more – opens in a new window or tab. Don, now at JBL, was to develop a line of horns and at the same time needed to change the design enough to get around the other patents.
Reasonable Price for 3 Pairs of JBL ‘s | Audiokarma Home Audio Stereo Discussion Forums
Sign in to check out Check out as guest. Studio monitor con woofer da 46cm mod.
Purtroppo nel settembre de ’49 la tragica fine di J. BTW, welcome to AK! Do they add well in phase? I had a chance to look at them today and the condition of the cabinets was surprisingly good. The consequence was a ibl ripple in frequency response. Two independent variables were at play here. Skip to main content.
Used JBL L Floorstanding speakers for Sale |
This item will ship to United Statesbut the seller has not specified shipping options. First samples were from a low tech molding process reaction injection molding? FA con tromba biradiale – freq. This is just my opinion and I do realize that a lot of great JBL speakers were designed contrary to this.
Thanks for the quick picture – very nice and mirror imaged too. Be sure to search around AK for some of the past threads discussing s including posts from a preeminent JBL guru Zilch, who is sadly no longer with us but his memory lives on and these speakers were his daily drivers. A small microphone is inserted into the side of the pipe near the compression driver.
No additional import charges at delivery! The biggest problem, though, was that UREI was stealing market share with their and This presents the compression driver with a resistive acoustical load so that pressure in the tube represents what the output of a perfect horn would have.
Also fit for JBL Loudspeaker for commercial use. Measured in this way most of the JBL jlb drivers would have flat response from several hundred Hz to about 3kHz.
Reasonable Price for 3 Pairs of JBL 4430’s
There would be several wavelengths of separation if they are both front mounted on the cabinet, leading to comb filtering in the crossover region. Hope the OP original poster had some good luck with the auction and comes back to advise with pics too what he was looking at and how he made out.
Studio monitor due vie con woofer jbo 38cm mod. Learn more – opens in new window or tab.