Speakerplans.com Homepage
Forum Home Forum Home > Plans > Plan Requests
  New Posts New Posts RSS Feed - Bass Horn plans for 18lw1400
  FAQ FAQ  Forum Search   Events   Register Register  Login Login

Bass Horn plans for 18lw1400

 Post Reply Post Reply Page  12>
Author
Message
Augusts View Drop Down
New Member
New Member
Avatar

Joined: 07 January 2017
Status: Offline
Points: 9
Post Options Post Options   Thanks (0) Thanks(0)   Quote Augusts Quote  Post ReplyReply Direct Link To This Post Topic: Bass Horn plans for 18lw1400
    Posted: 05 June 2018 at 11:49pm
Hello!

Just want to say Im happy to find your forum, I am very impressed with the work that people do here Approve
We are a small group of enthusiasts, we specialise mostly in techno production and DJ ing.

To make a long story short, we had an old Community sound system with blown/replaced drivers and also the boxes were starting to fall apart, so I rebuilt/ redesigned them. Whats left of community is 8x12" drivers for tops.
The system is now - 2x18sound 18lw1400; 2x18" china drivers and the rebuilt Community tops.
Eighteens are all ported boxes.


 

What I want to do now, is I want to build Tapped horn or front firing bass horns for the 18sound 18lw1400.
Community tops have 132db continous spl each so I would like the 18" horn to match that and play down to say 35 hz flat or so.

Tops are 60cm wide, so the horns should also be 60cm wide.
Sometime soon, I would like to also build some kickbass horns, for Eminence Omega 15 pro. I will stack those over the bass horns.

Please share some ideas for bass horns, there are probably some plans somewhere.


This is one topic I found would be a candidate for this occasion
https://forum.speakerplans.com/th18-build_topic98040.html


Thanks in advance!
August
Back to Top
Hemisphere View Drop Down
Old Croc
Old Croc


Joined: 21 April 2008
Status: Online
Points: 2241
Post Options Post Options   Thanks (0) Thanks(0)   Quote Hemisphere Quote  Post ReplyReply Direct Link To This Post Posted: 06 June 2018 at 8:28am
You will not get 132dB continuous flat to 35Hz from a single tapped horn.

The Xoc th18 is a good option, (the 'flat to 35hz' claim is -3dB and driver specific) but if you need to match your tops you're looking at two a side. One will still make a fair bit more noise than what you've got, although if you're currently running all 4 eighteens on the same freq band it might not be louder.
Phase 1: Post on Speakerplans
Phase 2: ?????
Phase 3: Profit!
Back to Top
MarjanM View Drop Down
Old Croc
Old Croc
Avatar

Joined: 10 February 2005
Location: Macedonia
Status: Offline
Points: 7053
Post Options Post Options   Thanks (0) Thanks(0)   Quote MarjanM Quote  Post ReplyReply Direct Link To This Post Posted: 06 June 2018 at 8:58am
You need to realize that tapped horns (or any other horn) are much more stressful environment for the drivers cone.
I dont think 18LW1400 is man enough for horn loading. 
Not that it wont work, but you should be very careful with the power applied to it.
Marjan Milosevic
MM-Acoustics
www.mm-acoustics.com
https://www.facebook.com/pages/MM-Acoustics/608901282527713
Back to Top
Augusts View Drop Down
New Member
New Member
Avatar

Joined: 07 January 2017
Status: Offline
Points: 9
Post Options Post Options   Thanks (0) Thanks(0)   Quote Augusts Quote  Post ReplyReply Direct Link To This Post Posted: 06 June 2018 at 8:46pm
Thanks for the answers.
The driver has BL 24 isn't that enought for a TH?
Does anyone have a Hornresp parameters pic for the xoc TH18? I would like to simulate it, Im not good at Hornresp.




Back to Top
Hemisphere View Drop Down
Old Croc
Old Croc


Joined: 21 April 2008
Status: Online
Points: 2241
Post Options Post Options   Thanks (0) Thanks(0)   Quote Hemisphere Quote  Post ReplyReply Direct Link To This Post Posted: 06 June 2018 at 9:20pm
18sound does specify horn loading in the product description so it's not that it won't work but there are better options.

You don't want to waste time building a pair of average tapped horns when you really need four strong ones to meet your requirements. 2 very strong ones or 4 okay ones will do in a pinch. Switching your two drivers to tapped horns won't give you the boost in SPL you're after.

Google image search for hornresp input screens. Most well known designs are on the first page of results.


Edited by Hemisphere - 06 June 2018 at 9:23pm
Phase 1: Post on Speakerplans
Phase 2: ?????
Phase 3: Profit!
Back to Top
MarjanM View Drop Down
Old Croc
Old Croc
Avatar

Joined: 10 February 2005
Location: Macedonia
Status: Offline
Points: 7053
Post Options Post Options   Thanks (0) Thanks(0)   Quote MarjanM Quote  Post ReplyReply Direct Link To This Post Posted: 06 June 2018 at 10:44pm
We had perhaps over 200 of those reconed over the last decade of so. So trust me, they wont take the beating.
They barely manage with 1KW in a reflex box.
Marjan Milosevic
MM-Acoustics
www.mm-acoustics.com
https://www.facebook.com/pages/MM-Acoustics/608901282527713
Back to Top
gen0me View Drop Down
Young Croc
Young Croc
Avatar

Joined: 20 February 2016
Location: UK
Status: Offline
Points: 650
Post Options Post Options   Thanks (0) Thanks(0)   Quote gen0me Quote  Post ReplyReply Direct Link To This Post Posted: 06 June 2018 at 11:05pm
Do they really have carbon fiber ribs? On catalogue photo cone doesnt look too solid.
I appreciate every like :)) https//www.facebook.com/genomesoundsystems
Mixes: https://www.mixcloud.com/gen-ome/
Back to Top
ceharden View Drop Down
The 10,000 Points Club
The 10,000 Points Club
Avatar

Joined: 05 June 2005
Location: Southampton
Status: Offline
Points: 11302
Post Options Post Options   Thanks (0) Thanks(0)   Quote ceharden Quote  Post ReplyReply Direct Link To This Post Posted: 06 June 2018 at 11:21pm
18LW1400 is a reflex driver.  A very nice sounding reflex driver.  There are some in local installs that have been going a very long time with a lot of abuse.  Main issue seems to be that the suspension starts to fail and develops an offset from centre.  Probably not the right driver for a high cone loading.

There are no carbon fibre ribs, I believe it's just a small amount of carbon fibre mixed into the pulp for the cone.
Back to Top
gen0me View Drop Down
Young Croc
Young Croc
Avatar

Joined: 20 February 2016
Location: UK
Status: Offline
Points: 650
Post Options Post Options   Thanks (0) Thanks(0)   Quote gen0me Quote  Post ReplyReply Direct Link To This Post Posted: 07 June 2018 at 1:20am
Double silicon spider? Thats one of firsts right?
I appreciate every like :)) https//www.facebook.com/genomesoundsystems
Mixes: https://www.mixcloud.com/gen-ome/
Back to Top
mobiele eenheid View Drop Down
Young Croc
Young Croc


Joined: 15 August 2004
Location: Netherlands
Status: Offline
Points: 1391
Post Options Post Options   Thanks (0) Thanks(0)   Quote mobiele eenheid Quote  Post ReplyReply Direct Link To This Post Posted: 07 June 2018 at 9:11am
Quote Sometime soon, I would like to also build some kickbass horns, for Eminence Omega 15 pro. I will stack those over the bass horns


With 4 x 12" going down to about 100 Hz and 2 x 18" per side taking the low end, you'll not be needing a kick cabinet, if the tops start at 150 - 200 Hz then sure.

I think the 18LW1400 will survive the XoC1 TH18 with around a 700 - 1000 W a piece (and a steep 30 Hz high pass) easily. Come to think about it, I think they'll survive about anything regularly available with that kind of power. Tuning to about 30 Hz (flat to 35 Hz) sounds good, they'll need to make a bit of excursion to stay cool.

I'll swear on the 18LW1400's life in Cubo Sub (up to 80 Hz) but if asked, I will vouch for the TH18 as well. That being said I would use the TH18's plans with the lowest compression ratio (no cone correction), that you can find.

How do you reckon those Chinese drivers compare to the 18LW1400?
Back to Top
Augusts View Drop Down
New Member
New Member
Avatar

Joined: 07 January 2017
Status: Offline
Points: 9
Post Options Post Options   Thanks (0) Thanks(0)   Quote Augusts Quote  Post ReplyReply Direct Link To This Post Posted: 07 June 2018 at 3:12pm
I think I might build two TH18 for start, and use the drivers with care, then upgrade to B&C drivers.

I dont know the xmax for community 12" drivers but i think its no more than 4mm, which would be not enough for 100hz.

China noname drivers come from omnitronic horns, They were rated 400w rms but I drive them 350w rms in reflex boxes. I do not want to push them because again no knowledge on xmax + they have a very large bump around 50 hz that makes the driver move a lot.

18 sounds are being fed 760 watts. Thats what I simulated in Win isd
Back to Top
Augusts View Drop Down
New Member
New Member
Avatar

Joined: 07 January 2017
Status: Offline
Points: 9
Post Options Post Options   Thanks (0) Thanks(0)   Quote Augusts Quote  Post ReplyReply Direct Link To This Post Posted: 07 June 2018 at 3:38pm
I cant find the input screens though
Back to Top
 Post Reply Post Reply Page  12>
  Share Topic   

Forum Jump Forum Permissions View Drop Down

Forum Software by Web Wiz Forums® version 12.01
Copyright ©2001-2018 Web Wiz Ltd.

This page was generated in 0.063 seconds.