I don’t but it’s the little brother to this one. If I needed a 1.4in I would 100% buy it based off what I’m hearing on the 2in.
All the superlatives.
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Hello All,
I read here and other places about 1.4 inch horns and drivers.
I also read about 1.5 inch horns horns and drivers.
Please do not tell me that it is 0.1 inches.
Is it the translation from metric to inches or are they really different creatures?
Thanks DT
I read here and other places about 1.4 inch horns and drivers.
I also read about 1.5 inch horns horns and drivers.
Please do not tell me that it is 0.1 inches.
Is it the translation from metric to inches or are they really different creatures?
Thanks DT
Yes, they are. JBL for instance uses 1.5". But from European manufacturers 1.5" drivers are quite scarce.
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Vitavox S2s are 1.5", as are JBL2435s. I had the Be versions of latter.
The S2 diaphragms are improved over the early originals.
I think they are great.
The S2 diaphragms are improved over the early originals.
I think they are great.
With some DIY effort, they can be matched.
One can file out the throats of many "1.4 inch" horns by 1/10th inch (~2.5mm) to match a "1.5 inch" driver exit, but matching bolt patterns is another challenge, horns are not drilled for all drivers.
One can also make an adapter plate to transition from a 1.4" driver exit to a 1.5" horn.
Sometimes an adapter plate is required just to accommodate different bolt patterns.
Kind of like tubes/valves, the "plumbing" requires different solutions:
Anyway, like with tubes/valves, it is a lot easier to not adapt if you don't have to.
Art
Yes, they are different creatures. If high quality of reproduction is asked for then some matching work has to be done like Art already mentioned.
Although I also own some JBL 1.5" drivers (D2430) I have never measuered their throat exit so I can't tell by how much they deviate from what they should actually measure. I just use them with nicey fitting JBL horns (PT95).
Regards
Charles
Indications that beryllium diaphragm for compression drivers is on the way out of the market now. If so, that's really unfortunate.
If so, it's not really surprising. Because of the price of these, they are not what the pa market use. The few enthusiasts that believes to hear the benefits, are just a speck on the sales sheet...
Why? Truextent supply issues or cost increases? Other underlying concerns (e.g. field reliability)? New kid on the block (Textreme etc)?
Answering my own question: Interesting from 2/2025 Voice Coil mag released today - TPCD (Textreme) replacing Be in ScanSpeak tweeters due to demand for Be in war materiel.
Supply chain issue. Radian has therefore put a temporary stop on all model sale with beryllium diaphragm. And seems to be the same with 18Sound.
The reason could be that Truextent will prioritize headphones/ear plugs, but that's only a rumour.
What NEW driver/diaphragm alternatives are the next best thing to JBL 2450J beryllium for neutrality, effortless detail and clarity for building a two-way system?
Also, how problematic is a typical restoration of a very used but working a pair of JBL 2450J drivers, even if the non-beryllium diaphragms are shot? Is any and all required documentation readily available?
"Working" might mean the DCR reads somewhere in the nominal range, and some sound comes out the hole when voltage is applied.
One cannot tell the internal condition of a typical compression driver from the outside.
A severely corroded driver could take hours to clean the gap to usable condition after digging out the pieces of the voice coil left behind.
A pinched gap can make a driver virtually useless- more cost to repair than new.
Considering how many individuals are completely unaware of the necessity of gap cleaning and diaphragm alignment procedures for JBL and similar compression drivers, I would conclude the required documentation is not "readily available".
Textreme diaphragms are similar to Beryllium as far as cumulative spectral decay goes.
That said, most customers prefer the longer spectral decay of "typical" diaphragm materials even if price is not a consideration, as the longer tails make high frequency have more "sparkle" which is equated to "detail and clarity".
Those preferences raise the cost of alternatives since they can't achieve economies of scale.
Art
Is that the same thing as "airiness"? And is that longer decay time the only mechanism that can produce it?
Such irony can only smack you upside the head the hardest, Gregory.
Okay, but how costly? Certainly not as much as a new pair of JBL2450J. https://usspeaker.com/jbl 2450H-1.htm
And a pair of beryllium diaphragms from US Speaker is ~ $2.3K.
I thought CDs with higher odd order distortion created the sense of "sparkle". I use a 2431 with original aluminum diaphragm that measures low THD with 3rd and higher distortion pushed lower than the 2nd. They sound a little laid back. So far I prefer those over decent domes with similar low THD levels but a higher mix of 3rd and higher. The domes have more sparkle but lack weight and dynamics. Cymbals, chimes and bells sound more realistic and with larger scale with the 2431.
I double checked the latest measurements, 2nd order is around .17% and 3rd is below the noise floor at .024% depending on frequency but a good 6-12 db lower than 2nd across the CDs range or use 1200-16000hz.
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