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Martin 218 Copies
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levyte357- View Drop Down
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    Posted: 06 February 2020 at 9:10am
Buying 4x 218s, supposed to be Martin copies, wonder if anyone here can confirm.

Trying to ID optimal drivers.
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levyte357- View Drop Down
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Points: 7450 		Post Options Post Options   Thanks (0) Thanks(0)   Quote levyte357- Quote  Post ReplyReply Direct Link To This Post Posted: 06 February 2020 at 9:33am
Looks very similar to Gsub, so obviously on driver list will be,

PD186,
L18P300/L18P400,
18PZB100,
Possibly Oberton 18XB1301
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jacethebase View Drop Down
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Points: 5648 		Post Options Post Options   Thanks (0) Thanks(0)   Quote jacethebase Quote  Post ReplyReply Direct Link To This Post Posted: 06 February 2020 at 10:28am
If they were emplying its a copy of a WS218X or a S218 I can confirm they are not!

Does look very G-Sub.
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levyte357- View Drop Down
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Points: 7450 		Post Options Post Options   Thanks (0) Thanks(0)   Quote levyte357- Quote  Post ReplyReply Direct Link To This Post Posted: 06 February 2020 at 10:53am
Originally posted by jacethebase jacethebase wrote:

If they were emplying its a copy of a WS218X or a S218 I can confirm they are not!

Does look very G-Sub.

Yep, Just spoke to mate  with plenty real Martin, says these are not copies of any Martin box.

No Biggie, they are cheap enough.

Now wondering, if B&C/RCF reflex 18s, are as strong, as orig PD186.
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KWB75 View Drop Down
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Looks like the old Martin BSX...
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Yup, ditto, the old martin BSX cabinet from the late 70's. Original drivers were RCF if memory serves.

https://forum.speakerplans.com/uploads/10879/BSX_Speakers.jpg


Edited by jbl_man - 06 February 2020 at 12:07pm
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levyte357- View Drop Down
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Points: 7450 		Post Options Post Options   Thanks (0) Thanks(0)   Quote levyte357- Quote  Post ReplyReply Direct Link To This Post Posted: 06 February 2020 at 12:19pm
Originally posted by KWB75 KWB75 wrote:

Looks like the old Martin BSX...


Many thanks for that, looks like that is exactly what they are..


Google says Martin 18" Driver for this is DLS111, anyone know if this is RCF or B&C driver?
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levyte357- View Drop Down
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Points: 7450 		Post Options Post Options   Thanks (0) Thanks(0)   Quote levyte357- Quote  Post ReplyReply Direct Link To This Post Posted: 06 February 2020 at 12:21pm
Originally posted by jbl_man jbl_man wrote:

Yup, ditto, the old martin BSX cabinet from the late 70's. Original drivers were RCF if memory serves.

https://forum.speakerplans.com/uploads/10879/BSX_Speakers.jpg


Right, I'm guessing orig driver, was early derivative of L18P300, so easy to acquire similar driver on steroids.
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Tonskulus View Drop Down
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Originally posted by levyte357- levyte357- wrote:

Originally posted by jacethebase jacethebase wrote:

If they were emplying its a copy of a WS218X or a S218 I can confirm they are not!

Does look very G-Sub.

Yep, Just spoke to mate  with plenty real Martin, says these are not copies of any Martin box.

No Biggie, they are cheap enough.

Now wondering, if B&C/RCF reflex 18s, are as strong, as orig PD186.



They are easily as strong if not stronger / better.  
L18P400 is one great reflex driver as example and these takes a lot of punishment no problem.
I have punished my RCF L18X400's so scary heavily (many times looking like they will rip apart because of so much brutal cone movement) but they just keep going no matter what.

PD186 has quite small Xlim, so that needs some attention not to destroy the voice coils w/ excessive peak power levels. It has also pretty weak motor for its size and Mms and thus making it even more sensitive for bottoming I think..





Edited by Tonskulus - 06 February 2020 at 12:50pm
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levyte357- View Drop Down
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Originally posted by Tonskulus Tonskulus wrote:


They are easily as strong if not stronger / better.  
L18P400 is one great reflex driver as example and these takes a lot of punishment no problem.
I have punished my RCF L18X400's so scary heavily (many times looking like they will rip apart because of so much brutal cone movement) but they just keep going no matter what.

PD186 has quite small Xlim, so that needs some attention not to destroy the voice coils w/ excessive peak power levels. It has also pretty weak motor for its size and Mms and thus making it even more sensitive for bottoming I think..



Extremely difficult to find PD186 Mk1, so forgetting those.

L18P400 T/S seemed noticeably different to L18P300.

I've found an 18sound driver that fits the bill, so gonna order 2x for a test.
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jbl_man View Drop Down
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I seem to recall people plonking the old Fane Collosus from the 1980's in these as a replacement for the RCF's with good results. 
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Why not simulate some things first.
Verify net volume, tuning and off you go.
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