New cabinet for L200

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Dear A

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Dear All
I have a pair of L200 (A)
The drivers are fine but the cabs needed a bit of work
I had taken advice to increase the volume of the cabs to improve the LF performance but in that process have concluded that i should really make new cabs.
(the humidity over the 40 years has softened the panels)

In spite of negative comments i have read about the LE15B I intend to use all the original drivers.
Would appreciate ideas re cabinet dimensions, port(s) , Xover
(Have the LX16 but would like to add a super tweeter to make it a 3 way, so am happy to ditch these)

It would be nice to maintain a sloping front baffle ala the original cabinets.
All advice appreciated.

SM

[hatrack71]

Lots of members here have custom 3 way crossovers. You could always start with just adding an N8000 to your LX-16 for 077 slots or an N-7000 for 075 bullets. Either N333 or 3133 networks would suit what you are after as well. Those were stock in the L-300 and 4333A respectively. I would be worried about a woofer impedance mismatch with the latter option though as well as the cost to acquire. You would need to additionally acquire 136As, 2235Hs or 2231As to really be matched. So your best $$ option in my opinion is either N-7000/075 or N-8000/077.

Oh..... and welcome!

[hjames]

A lot of recreating cabinets depends on how skilled a woodsmith you are ...
or if you have a good cabinetmaker on hire.

I am not much skilled with wood - so I found a used pair of empty L200 cabinets locally, then later found a better pair.

I started with a 4320 and moved the parts into a pair of L200 cabs, later adding a 2405 slot tweeter, and building what amounts to a 3 way crossover like the 4333 speakrs came with. I later swapped the L15s for 2235s, then swapped them with a pair of 2234s that came in a pair of 4 way Monitors I got. Later on I tried external Smith horns instead of the LE85s, then had custom walnut horns built ...
Anyway, the point is there is a lot you can do with that hardware ...
given time to tinker and a growing budget.

Keep your mind and your options open, and trust your ears.

More specifics -
http://www.audioheritage.org/vbullet...erdeen)/page15

Dear All
I have a pair of L200 (A)
The drivers are fine but the cabs needed a bit of work
I had taken advice to increase the volume of the cabs to improve the LF performance but in that process have concluded that i should really make new cabs.
(the humidity over the 40 years has softened the panels)

In spite of negative comments i have read about the LE15B I intend to use all the original drivers.
Would appreciate ideas re cabinet dimensions, port(s) , Xover
(Have the LX16 but would like to add a super tweeter to make it a 3 way, so am happy to ditch these)

It would be nice to maintain a sloping front baffle ala the original cabinets.
All advice appreciated.

SM

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Points well taken James
Will be working towards making the L300 cabs.

The 3133 schematic u gave me has my electronical friend a bit concerned.
We need to source all those parts (coils and caps) in the US. No way to get those funny mH spec coils here!
Can u put me in touch with a seller who will be familiar with what i need and who will ship the stuff to me?

[hjames]

Points well taken James
Will be working towards making the L300 cabs.

The 3133 schematic you gave me has my electronic friend a bit concerned.
We need to source all those parts (coils and caps) in the US. No way to get those funny mH spec coils here!
Can you put me in touch with a seller who will be familiar with what i need and who will ship the stuff to me?

I believe I got most of it from Parts Express when I built my pair a few years ago -
http://www.parts-express.com

Wrote it all on a list, looked it up, put in the order online ...

I gave you the just the schematic a couple posts back, but I would recommend you read
the full design thread where that schemo came from

4333/S300/L300 equivalent bandbass circuit
http://www.audioheritage.org/vbullet...-circuit/page4

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Gosh its been a while.
In summary the old L200 was converted to a 3 way by adding the 2405s and modifying the XOs (L16 +N8000)
Resulting speakers have been used sparingly.
They dont sound great i think because the LE15B s are such awful woofers.
I am considering taking them towards the L300.
The 2355H woofers are hard to come buy especially where I am .
is there an alternative ? 2226H perhaps ? or can anyone suggest another brand of woofer.
i was thinking of making up the Nelson Pass version of the L300 XO, or actively driving them.

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Its been a while,.... almost there

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thank u Mr Widget
Still no comments abt the volume of the L300 cabinet and the recommendation to me that i should aspire to a volume of 5.5 to 6 cu feet?
Thanking u in anticipation

[hjames]

thank u Mr Widget
Still no comments abt the volume of the L300 cabinet and the recommendation to me that i should aspire to a volume of 5.5 to 6 cu feet?
Thanking u in anticipation

Kind of depends on what you want to have, doesn't it?

I mean, the L300 is a legendary speaker that commands high resale values even today -
seems like they got many things right with that combination.

Why redesign it if you are not sure what you'll have afterwards,
and you aren't sure that all the pieces will work that well together?

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Powered up.
Am at the stage of waiting for my cabs, so i made this vid for my cabinet maker to pull out the finger and get on with the job!

http://www.youtube.com/watch?v=rVoiWqsqr4M


Actually there s a problem.
One of my 'new' 2405 s is not supertweeting, so will have to sort that out.
Everything else is good,

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Made up these X overs
Retained the original 2.4 mH Inductors and 5 ohm resistors
All the rest new - all new inductors from Mundorf
Caps from Mundorf mainly
First X over built with pal BSL Lee, next one built with my 14 y o daughter

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Dear hjames and hatrack71
Many thanks to u both for yr thoughts.

JBLs are pretty rare in my neck of the woods and swapping and changing drivers wont be possible really.
The drivers when they are available are v expensf.
I am v happy to stick with what i have.

But the idea of making them a 3 way is very attractive. i have read that the horns in the L200 dont go too high and the L200 were much improved by the subsequent models ?L200B and L300.
(I think the L200 is prob the least loved of the old JBLs, but what the heck - dad bought them in '73 - time to keep them going after some improvement).

I am not familiar with the JBL driver nomenclature .
I take it, hatrack, that the 077 and 075 are supertweeters?
What are the N7000 and N8000 ? - are they electronics added to the LX16 X Over that would allow it to drive 3 transducers?

[hatrack71]

Dear hjames and hatrack71
Many thanks to u both for yr thoughts.

JBLs are pretty rare in my neck of the woods and swapping and changing drivers wont be possible really.
The drivers when they are available are v expensf.
I am v happy to stick with what i have.

But the idea of making them a 3 way is very attractive. i have read that the horns in the L200 dont go too high and the L200 were much improved by the subsequent models ?L200B and L300.
(I think the L200 is prob the least loved of the old JBLs, but what the heck - dad bought them in '73 - time to keep them going after some improvement).

I am not familiar with the JBL driver nomenclature .
I take it, hatrack, that the 077 and 075 are supertweeters?
What are the N7000 and N8000 ? - are they electronics added to the LX16 X Over that would allow it to drive 3 transducers?

Yes! The N-7000/N-8000 are JBL tweeter networks made to be used in conjunction with other JBL networks like the LX-16. Just run the HF out of the LX-16 to the input of the N-7000/8000. LF out on Lx-16 still goes to the LE-15b. From the N-7000/8000 network run the LF to the JBL L-200 horn/driver (pass through), and then the HF to either the 075 or 077 tweeter. Done. Nice thing is they have the same cutout for mounting and are the same size as your LX-16 so it looks stock. Now you just need to find either N-8000/077(2405) or N-7000/075(2402). Not going to be cheap but still the least expensive option in the route you want to take.

Let's see some pics of the cabs. I restored a pair that were all broken up. Hardest parts to find/make are the trim pieces on front. Maybe we can help you fix the cabs? Original is still best to maintain value.

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Thanks hJames
Do u anticipate i may run into major issues in using the LE15B instead of 2234 or 2235 with the 3133 X over?
impedance issues?
btw those wooden horns/lenses on yr LE85 s are cool