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In Reply to: RE: LS3/5s vs Modern Speakers posted by Brian Levy on October 07, 2014 at 09:32:21
Two major advances in driver technology are increased Xmax and the introduction of copper or aluminium shorting rings which reduce distortion.
That is besides the large improvements available from active operation.
If one likes the sound of lower distortion in speakers is a completely different matter though.
Follow Ups:
I think that JBL and Altec Lancing were using shorting rings when they introduced ferrite magnet woofers. This was pro drivers of course. The technology is an excellent solution and I glad it is being more widely used.
Dave
JBLs pro drivers have pretty much always been two steps ahead of the curve.
It seems to take a generation before things trickle down to their domestic drivers and another before other manufacturers catch up.
These days it is becoming difficult to find drivers without shorting rings once you get into the mid-range of bare drivers.
But JBL have kind of upped the ante with their split-coil woofers which feature a dynamic brake (basically a third central coil which is shorted) preventing the driver from destroying itself through over-excursion. As far as I know they sadly don't sell them yet as bare drivers.
Although that may be more of interest for pro use or some from the open baffle fraternity.
I have heard some JBL pro speakers and I was surprised how good they sounded. There engineers seem to know what they are doing.
Dave
By active operation do you mean bi-amp using either an active external crossover or an internal big-amp/big-wire system?
If the former, you can than Rudy Bozak and if the latter, depending on definition you can thank Villcher and boys or Art Janszen. If you mean internal amps, look back to ADS and Advent in the early 70s and slightly before. Of course the concept of this last goes all the way back to the earliest days of audio the speaker occupied the same cabinet and was match to the amp and in the case of field coils, even powered by it.
Don Brian Levy, J.D.
Toronto ON Canada
By active I mean replacing the speaker level xover with a line level one and one amp per driver.
If the amps are built into the cab doesn't really matter that much.
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