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186 Hole cut Diameter?

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Category: Plans
Forum Name: 1850 and 186 horns
Forum Description: Discussion / Questions about the 1850 and 186 horns
Printed Date: 20 March 2023 at 1:07pm
Software Version: Web Wiz Forums 12.05 -

Topic: 186 Hole cut Diameter?
Posted By: _banksy_
Subject: 186 Hole cut Diameter?
Date Posted: 18 January 2010 at 6:56pm

 I have ordered my PD 186 For my 186 Horn I am Building, However I want to Cut the intalation hole for the speaker in my Ply before it arrives.

What is the Diameter or radius for the hole to be cut?

Cheers, Will


Posted By: djeddie
Date Posted: 18 January 2010 at 7:40pm
Well according to the - PD data sheet (picture at bottom right hand corner) it's 414mm. But don't quote me on that.

Chas n Dave : it's like Drum and Bass but with beards.             E=mc² ±3dB

Posted By: _banksy_
Date Posted: 18 January 2010 at 8:53pm
Thanks For pointing that out.


Posted By: _banksy_
Date Posted: 24 February 2010 at 5:17pm
I will be cutting the hole this weekend. can anyone else verify this is the correct size. just making sure!!


Posted By: markie
Date Posted: 24 February 2010 at 9:26pm
I've checked an older data sheet (from when PD were in Cornwall), plus 3 other PD 18" that use the same chassis and all state 414mm hole for front mounting. But they could all be wrong.

If it's got wheels or tits it's gonna cost a fortune

Posted By: The Builder
Date Posted: 24 February 2010 at 9:55pm
Got blown ones here. I'll TRy and remember to measure tomorrow.

Posted By: Tapeworm
Date Posted: 26 February 2010 at 2:35pm
When I built mine a couple of years back, I used the measurements off the manufacturers speck sheet and they were fine!

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