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"Polar Bear" Scoop build
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mchw View Drop Down
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Joined: 08 July 2025
Location: bristol
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Points: 4 		Post Options Post Options   Thanks (0) Thanks(0)   Quote mchw Quote  Post ReplyReply Direct Link To This Post Posted: 06 October 2025 at 7:08pm
Originally posted by levyte357- levyte357- wrote:

Firstly, I would  suggest selling the 1850/2 now, and getting 1851s.
Only driver I liked better than PD 1851s, are 18NLW9601.

Unfortunately the cab has to be built first as we have just spent our budget on the wood however we would probably end upgrading drivers two months after the cabs have been build as 4 PD1850/2 can probably sell for £250 each maybe but getting 4 PD1851s would cost £400 each :/

Originally posted by levyte357- levyte357- wrote:

I would suggest the Mykey plan, 738mm depth version. with following mods,
  • Make cab 636mm wide,
  • Reduce front baffle depth from 36mm to 18mm
 

  • Just checking, is the 636mm wide for the entire cab or just the baffle (making the whole cab 636+36)
  • With the front baffle depth reduction, would I remove the inside panel (making the chamber have more volume), or the outer one?
  • I have bought 2.5 sheet of ply per cab so with the spare aim to add bracing. Should I add a cross "plus shaped" bracing or just a single 36mm horizontal bar like I have seen on others. And of course I will be adding internal bracing.
Thanks.
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levyte357- View Drop Down
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Joined: 27 July 2012
Location: UK, South East
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Points: 8517 		Post Options Post Options   Thanks (0) Thanks(0)   Quote levyte357- Quote  Post ReplyReply Direct Link To This Post Posted: 07 October 2025 at 6:28pm
Originally posted by mchw mchw wrote:

Unfortunately the cab has to be built first as we have just spent our budget on the wood however we would probably end upgrading drivers two months after the cabs have been build as 4 PD1850/2 can probably sell for £250 each maybe but getting 4 PD1851s would cost £400 each :/
Would expect you can find used 1851s for up to £275 each.

Originally posted by mchw mchw wrote:

  • Just checking, is the 636mm wide for the entire cab or just the baffle (making the whole cab 636+36)
  • With the front baffle depth reduction, would I remove the inside panel (making the chamber have more volume), or the outer one?
Make total cab width 636mm Wide
Yes, just remove inner 18mm panel off driver baffle, basically slightly increasing chamber
Originally posted by mchw mchw wrote:

  • I have bought 2.5 sheet of ply per cab so with the spare aim to add bracing. Should I add a cross "plus shaped" bracing or just a single 36mm horizontal bar like I have seen on others. And of course I will be adding internal bracing.
Thanks.
Cross brace is very old fashioned.

Single 36mm brace is one way, more modern approach, would be 2x 18mm horizontal braces,  full grill adds to the look, especially if you add grill foam.


Edited by levyte357- - 07 October 2025 at 6:29pm
Global Depopulation - Alive and Killing.
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