Post by EeyorePost by EeyorePost by RupertPost by EeyoreLook at my link. If you don't understand it, find someone who does. NO
tweeter
Post by EeyorePost by RupertPost by Eeyoreprotection. I fit tweeter potection on every single one I use or
design in. Plus it
Post by EeyorePost by RupertPost by Eeyorelooks like only a 12dB/octave crossover which won't help much either.
Graham, the SR4722 is an early 90's box that was discontinued long
ago. That said, it was a fairly solid box made with good quality
drivers. I believe the 12" driver is still in production at JBL and
available for sale. It was also used as an OEM driver for several
other companies boxes. The compression driver, while decent, has been
out of production for a while. The box was designed and built in the
U.S. JBL factory. This box is likely leaps and bounds better then
anything offered in the JRX series and is probably an ok buy for the
money if it's in good shape. 12dB octave crossovers are the norm for
boxes in that price range. Crossover components to build good 3rd or
4th order designs tend to be cost prohibitive in that particular
market. The best solution is to bi-amp and use a decent external
processor for optimum time alignment, EQ, and limiting. FWIW, most top
end sound reinforement boxes have no crossovers or tweeter protection
except for the self powered ones. Non-powered multi-way/multi-amped
boxes require all that stuff externally.
Thanks for the clarification. That does put a different perspective on it,
although I
Post by Eeyorewouldn't use a box with a crossover freq as low as 1.2kHz (bang right in
the critical vocal
Post by Eeyoreband). I'd still be worrying about those tweeters. Still, replacement
diaphragms seem to be
Post by Eeyorewell available (maybe they're regularly needed ?). Best price I saw was ~
$110
Post by Eeyorehttp://www.planetdj.com/i--D8R2417
although you can get a 'copy' for less.
http://www.circuitshoploudspeakers.com/product/2416H-1%20Diaphragm
Graham
The SR is a bit more solid.
$110 for a diaphragm sounds a bit silly when you can buy a BMS driver,
likely better, for about that.
I've had bad luck with aftermarket diaphragms. The exception being Radian.
Agreed. The Radians are pretty good. I've used them in my TAD's when
the OEM replacements were either scarce or money was tight. At about
1/3 the price of the $600 TAD beryllium diaphragms, they're not bad.
The TAD's to go up a bit higher with better sparkle on the top end,
but the Radians are a bit more efficient.
Rupert
I actually like the Radian better than I do JBL titanium phragms. Don't say
that on the JBL forum though- they have a short fuse for what they consider
sacrilege.
Have noticed, sometimes the Radian doesn't seem to handle quite as much
power, the exception again being small Altecs, the Radians hold up way
better than factory.
20 years a go I made a decent second income selling replacement Altec
phragms. They blow up real good.
Large format altecs are much better. The old Alnico 288-G series is often
called the "Poor man's TAD."
At what they sell for on FeePay though, doesn't make sense for live use.
The Altec 299 is a VERY good sounding driver, IMHO way better than JBL's.
And they can be bought reasonably.
Hated to see what happened to Altec, so many manufacturers make cheesy
product, sad to see a quality company killed off.