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Modified 186 horn build pics - more added 10/06/09 |
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Wrighty ![]() Old Croc ![]() Joined: 17 April 2004 Location: Devon Status: Offline Points: 1801 |
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Yes, I realise that. There are some plots on here somewhere which I did at the design stage, showing that the 18LW1400 in the narrow cab is at least as good as the PD186 in the full width cab, with added benefits such as greater Xmax and Xmech.
I left the bottom closing piece out of the rear chamber to make up for the loss of volume there - this gave the best plot in Hornresp. If you look at the BL factors of the 18LW1400, PD186 and PD1850, the 18LW1400 sits somewhere in between the PDs, hence the optimum rear chamber size being somewhere between the 186 horn and the 1850 horn. That's my understanding of it anyway! |
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ALL YOUR BASS ARE BELONG TO US.
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Wrighty ![]() Old Croc ![]() Joined: 17 April 2004 Location: Devon Status: Offline Points: 1801 |
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Ok, plots here. Standard 636mm wide 186 horn, loaded with PD186 in grey. My 536mm wide 186 horn without closing piece in rear chamber, loaded with Eighteen Sound 18LW1400 in black. One cab, half space, 1w@1m.
![]() 4 cabs (again, 636mm PD186 in grey, 536mm 18LW1400 in black): ![]() Edited by Wrighty - 06 January 2009 at 2:15pm |
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ALL YOUR BASS ARE BELONG TO US.
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imageoven ![]() Old Croc ![]() Joined: 28 March 2007 Location: Scotland Status: Offline Points: 2170 |
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I like the handles on the hatch, combined with the wheels - wish I'd done it like that on my 1850's. good work.
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Wrighty ![]() Old Croc ![]() Joined: 17 April 2004 Location: Devon Status: Offline Points: 1801 |
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Yeah, I borrowed that idea from EV MTL-1X bins which I used to work with on a regular basis. Saves store and van space, not having 4 castors sticking out the back of each bin!
Still not got round to putting the metal bar handles in, doing final sand and painting them - garage is now full of stuff again and the weather has been too wet and/or cold :( |
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ALL YOUR BASS ARE BELONG TO US.
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FUBARD303 ![]() Registered User ![]() Contentiously righteous Joined: 29 September 2008 Location: Allup Inyo MOUF Status: Offline Points: 120 |
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Mr novice here. Im here cause I searched for the driver your using. Stupid question possibly but why would you put these in horns when you can get +20spl in dual reflex boxes? Also have you seen the modular horn plans on speakerstore.nl? Same guys that designed punnisher made a horn for the 18sound. Looks interesting.
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"Always look on the bright side of life" -Brian
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Wrighty ![]() Old Croc ![]() Joined: 17 April 2004 Location: Devon Status: Offline Points: 1801 |
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Erm, ok. Those plots are for 1W @ 1m. So that driver in that folded horn enclosure will produce 105dB with 1W input power @ 1m distance. That driver in a single reflex box will produce 98dB with 1W input power @ 1m distance, so a double reflex enclosure will produce about 101dB @ 1W @ 1m.
If we're talking about maximum continuous power (which I suspect you are), the horn loaded enclosure will produce about 136dB @ 1400W @ 1m, whereas the reflex will be about 128dB @ 1400W @ 1m. |
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ALL YOUR BASS ARE BELONG TO US.
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FUBARD303 ![]() Registered User ![]() Contentiously righteous Joined: 29 September 2008 Location: Allup Inyo MOUF Status: Offline Points: 120 |
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Ops, new guy mistake. I was comlaring your 1w to my 1400w, Like I said...
Admirable handywork though, a true craftsman indeed. Hope mine should turn out half as nicely. So... If I were to build some of my own (without storage space restricions) would you still reccomend the -100mm ? |
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"Always look on the bright side of life" -Brian
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Wrighty ![]() Old Croc ![]() Joined: 17 April 2004 Location: Devon Status: Offline Points: 1801 |
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Build them to the plan - the simulations are very similar.
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ALL YOUR BASS ARE BELONG TO US.
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mhtplsh ![]() Registered User ![]() Joined: 27 August 2007 Status: Offline Points: 112 |
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Can u post picture of the input parameter window of Hornresp of the above graphs? |
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Wrighty ![]() Old Croc ![]() Joined: 17 April 2004 Location: Devon Status: Offline Points: 1801 |
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PD186, standard 636mm wide 186 horn:
![]() 18LW1400, modified 536mm wide 186 horn: ![]() Edited by Wrighty - 21 May 2009 at 10:10am |
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ALL YOUR BASS ARE BELONG TO US.
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breakdabeat pete ![]() Young Croc ![]() ![]() Joined: 10 March 2008 Location: norwich Status: Offline Points: 753 |
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been looking for the 186 input param for ages
nice one |
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٩(̾●̮̮̃̾•̃̾)۶
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Wrighty ![]() Old Croc ![]() Joined: 17 April 2004 Location: Devon Status: Offline Points: 1801 |
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I finally got round to making a couple of jigs for the handle cutout and rebate, to use with a 12.5mm cutter and 30mm collar on my DeWalt router. Here are some pics...
Handle cutout jig: ![]() ![]() Used router just to skim the surface, giving me a guide for the next step: ![]() Cut out roughly with jigsaw, leaving about 2-3mm inside the router mark, for speed and to prolong life of router bit (top tip from Insomnia, I think): ![]() Edges cleaned up with router: ![]() ![]() Jig number 1 removed, jig number 2 (for rebate) fixed in its place: ![]() Rebated to a depth of 5mm to allow for thickness of handle + screwheads: ![]() Jig removed and edges cleaned up with a bit of sandpaper: ![]() Handle placed in rebate: ![]() 2 handles in place (and a lot of sawdust): ![]() Finished for the day - 2 cabs with 4 handles in each. Just the other 2 to do now! ![]() |
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