JBL EVEREST DD55000

[joaoneves]

Need advice on a active crossover to use with my Everest.
Apparently the 5235 is out of production for 10 years.
Does anyone know the crossover slopes of the everest?
Owning a pair of speakers that are rare in europe or USA, is difficult. most of them are in japan.

[4313B]

Anything decent.

Build your own.

Have Marchand (http://www.marchandelec.com/) build you one.

Here's the product brochure showing the voltage drive.

http://www.lansingheritage.org/html/jbl/specs/home-speakers/1985-everest.htm

http://www.lansingheritage.org/images/jbl/specs/home-speakers/1985-everest/page10.jpg

Here's the schematic of the passive filter.

http://manuals.harman.com/JBL/HOM/Technical%20Sheet/DD55000%20Everest%20ts.pdf

Put that in spice, CircuitMaker or LEAP CrossoverShop, etc. and then come up with the active equivalent.

[Zilch]

Apparently the 5235 is out of production for 10 years.They're plentiful in the used market....

[4313B]

They're plentiful in the used market....I would follow my advice instead, especially given the "flagship" status of the Everest.


Oh wait! A 5235 would make it quick and easy and I have one sitting right here to sell! Nevermind the above statements - the 5235 would be an excellent choice for a DD55000. :yes:

[sourceoneaudio]

Hook up link tips.

http://www.audioheritage.org/vbulletin/showthread.php?t=9773&highlight=5235



Jeff
J/S-S1A :D

[Zilch]

O.K., here's the problems:

1) I see no original recommendation in the specs for running E1 with an external active crossover, let alone 5235, specifically.

2) Looking at the passive crossover, I don't see a logical two-way split, so it's three-way. That's a pair of 5235s, with custom cards to replicate the voltage drives.

3) Alternatively, it's a different active crossover, plus the requisite EQ on each filter. The Behringer DCX2496 might do it. Otherwise, let DEQX figure it out.

4) I can't Spice it, because of the tapped inductor in the MF. With the tap values, maybe. I'm not volunteering here, nope.

5) So, measuring the actual voltage drives from the stock passive crossover seems like the best place to start. Compare to the published curves and resolve discrepancies before proceeding.

[hjames]

O.K., here's the problems:

1) I see no original recommendation in the specs for running E1 with an external active crossover, let alone 5235, specifically.

5) So, measuring the actual voltage drives from the stock passive crossover seems like the best place to start. Compare to the published curves and resolve discrepancies before proceeding.

Why not use one of those JBL/UREI 553 crossovers and just TriAmp the whole t'ing

[4313B]

O.K., here's the problems:

1) I see no original recommendation in the specs for running E1 with an external active crossover, let alone 5235, specifically.

2) Looking at the passive crossover, I don't see a logical two-way split, so it's three-way. That's a pair of 5235s, with custom cards to replicate the voltage drives.

3) Alternatively, it's a different active crossover, plus the requisite EQ on each filter. The Behringer DCX2496 might do it. Otherwise, let DEQX figure it out.

4) I can't Spice it, because of the tapped inductor in the MF. With the tap values, maybe. I'm not volunteering here, nope.

5) So, measuring the actual voltage drives from the stock passive crossover seems like the best place to start. Compare to the published curves and resolve discrepancies before proceeding.I guess I just don't see where any of it is your problem...

[Zilch]

I guess I just don't see where any of it is your problem...Consider it an inquiry then, maybe? :dont-know


Why not use one of those JBL/UREI 553 crossovers and just TriAmp the whole t'ingRequires EQ in the midrange, at least, Heather. The stock passive also provides for a bit of optional compensation in the LF, as well....

[Robh3606]

Because of the way was originally designed you can't just drop in an M552 or M553 and get the correct results. You need to run the voltage drives on the networks and then have an active network made that matchs them. A 5235 won't work either. As far as clonning one well L3 is going to present a problem if it's no longer available.

Rob:)

[4313B]

As far as clonning one well L3 is going to present a problem if it's no longer available.OT - The networks are still available brand new believe it or not. $528 each MSRP.

Kind of makes my cc networks a major bargain. :rotfl:

[joaoneves]

I have thougt of it. when i lived in Macau, i saw a some systems in hong kong using JBL/UREI, mainly what someone call as UltraFi systems, multi/active systems.
I just feel reluctant in, kind of change the speakers. i think i´ll just let them be as they are. just need to change the Mid range unit to new ones. where can i get a price list so that i can have an idea of how much i´m gone spent?

[4313B]

i think i´ll just let them be as they are.Probably a good call.
just need to change the Mid range unit to new ones.Just aquaplas the zing out of the titanium diaphragms. Contact Guido.

Or replace the 2425's with TAD's. Contact Mr. Widget.

[joaoneves]

i want to assembly an active system.
a few days back i heard my everest beiing driven by a otl amplifier, the atma-sphere 60. just love that mid range.
in the lows still prefer my mac mc 275. so why not assembly and matching components to do their best.i´m gona try to come with some idea of drivers and i would like to know opinions about it. i´m kind new in the spkrs field.
in a couple of mounths my hifi room is gone have around 100m2, and is beiing sound treated
thanks:)

[4313B]

i want to assembly an active system.Then pull the passive filters, put in some nice terminal boards with binding posts leading to each transducer and go active/digital.