Mini-Everest?
Appears to be the same horn with the face hacked off.
[O.K., O.K., "truncated," then.... :p ]
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Mini-Everest?
Appears to be the same horn with the face hacked off.
[O.K., O.K., "truncated," then.... :p ]
Nope, I don't believe 2426 diaphragm is aquaplas coated....Quote:
Originally Posted by Bernard Wolf
Thanks Zilch !
- The H2600 has arrived ? That was fast ! :blink:
- Too bad about the throat adapter . :(
- It sure does look like a sawed-off 2346 . Isn't that interesting !
Agreed :pQuote:
Originally Posted by Lancer
:D
You are absolutely right - I just downloaded the instruction manual from JBL and it is only the bass driver that is coated.Quote:
Originally Posted by Zilch
Bernard
Well.. yes :blink:..... I thought everyone knew that ... thats why I was rather bothered by some recent postings about the Everest having a diffuse soundstage... I didn't say anything because I have not heard the Everest, but I can tell you that the 3100 has really great soundstaging qualities and I cannot imagine the Everest not being the same.Quote:
Originally Posted by Zilch
Bernard
[QUOTE=Earl K]
- If it was me ( & if I couldn't stand the suspense ), I would buy a pair of 275 replacement diaphragms ( plastic coated Titanium ) and install them into the stock 2426 drivers .
/QUOTE]
Do you think that would be a drop in replacement then ? No need to tweek the x'over? Same sensitivity ? If that were the case it would be a simple way to go, assuming I can find the diaphrams that is.
Bernard
Hi Bernard,
For The Sake of Clarity
- I'll only assume the 275nd diaphragm will physically "fit" into the 2426h magnet assembly .Quote:
Do you think that would be a drop in replacement then ?
- This "fitup" assumption is based on an older link to a web-page ( since deactivated ) that was posted by an ex-JBL intern/apprentice who built an MTM system using 10" drivers ( 127H-1 ) with a 2426 that was fitted with a 275nd diaphragm . Since he had "inside" ( JBL ) exposure to workable mods, I'm just following his lead .
- I would assume the ( N3100 ) crossover would need some tweaking . This hybrid driver combo will likely have a response curve ( just guessing ) that has less lower mid response and more HF response than a stock 2426h. ( See Ziches crossover studies )Quote:
No need to tweek the x'over?
- I would guess the hybrid will require a reworking of at least some values within the crossovers hipass section. Again, see Zilches excellent graphs of the two crossovers voltage drives for my reasoning .
- The hipass section of the "mkII network" was obviously reworked to accomodate for a differing of the responses between the two driver types
- I doubt it . See the above and look at Zilches voltage drive graphs . Also, note that the rework of the S3100 to the S3100 mkII allowed for a 1 db net increase in "system" efficiency ( this info is from the technical cut sheets ). The values of the damping resistors in the LF were raised ( in the mkII ) effectively burning off a little less energy. I assume this coupled with the rework of the hipass section allowed for the newer ( higher ) system rating .Quote:
"Overall" Same sensitivity ?
- Nothing is ever simple with this stuff. :pQuote:
If that were the case it would be a simple way to go, assuming I can find the diaphrams that is.
:)
ps ; Would I still try out this hybrid driver ? Yes , but then I'm always willing to tinker with stock networks .
thanks ever-so-much Earl, much appreciated... although most of whats being recommended is out of my league. I think what I will do is try to get that single 275nd if the bidding does not go too high. From there I have a friend - not local unfortunately - who can help me to build a mkii network while I wait to find another nd. Sound like it will be a long term project, but I don't mind that. In the meantime I could at least find out if the nd diaphram will actually fit as a retrofit.. thats assuming I win that bid.
Will let you know what happens when the bidding stops ;)
Bernard
Hey Zilch,
Quote:
,,,,(+useTHROAT 318793-001)
Say,, did you have a conflab with JBL about this missing H2600 throat ?Quote:
Originally Posted by Zilch
And ?
<. :)
Confab? Bwahahaha!Quote:
Originally Posted by Earl K
They won't answer my eMail OR my phone calls now.
Musta flagged me as "TROUBLE!"
I have two horns, now, no throats. :biting:
This is Harman consumer I'm dealing with. If it was JBL Pro parts, I'd have 'em by now.
Matthias is sending me drawings to make my own, if necessary.... :)
Ohhh,Quote:
This is Harman consumer I'm dealing with. If it was JBL Pro parts, I'd have 'em by now.
Hmmmm, I really don't want to speculate .Quote:
They won't answer my eMail OR my phone calls now.
Musta flagged me as "TROUBLE!"
Yep, that's a drag !Quote:
I have two horns, now, no throats.
- Yeh , that's a good idea . From my perspective, these loading throats are all quite interesting. They all seem to be an adaptation of early parabolic horns ( H. Olsons' designation for the more evolved Smith horn ).Quote:
Matthias is sending me drawings to make my own, if necessary....
- I could post pics of the Altec style CD entry throat if you need them. The Altecs are a little more straightforward ( a little more planar or conical in their entry which will effect the lower ranges loading )
:p
Well,,,,, Bernard ???? :)
Well.. I won the bid at $182.50 ! Not too bad I figure. I am now negotiating with the seller on a new 275nd diaphram which he is also auctioning. I f I can manage that then I will have 2 diaphrams and a driver. hey, its a start. At least I will then be able to experiment with changing just the diaphrams. According to the seller they are interchangable, size wise. We will see. In the meantime I will of course be on the lookout for another 275nd driver. If you happen to see one lying around...:)Quote:
Originally Posted by Earl K
Bernard
Nice ! ... Yeh, I consider that a fair price ( considering the build quality of the driver and the rumoured price of a new 275nd diaphragm ) .Quote:
Well.. I won the bid
Hope that negotiation works out for you ! :)Quote:
I am now negotiating with the seller on a new 275nd diaphram which he is also auctioning.
So, I finally did get the other 275nd diaphram but have not had the courage to try and swap them out yet. I am presently trying to acquire some new bass driver Gaskets - one of mine is due - and as I need to take out the bass driver to get at the 2426 once I get these I will probably at least take a look at trying a swap. Will keep you informed although perhaps these questions have been answered with Zilchs' experimentations.... I have not had the time to follow all of those experiments !
Bernard