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My 18" horn, Invader Bin
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parabox View Drop Down
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Joined: 03 February 2017
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Points: 20 		Post Options Post Options   Thanks (0) Thanks(0)   Quote parabox Quote  Post ReplyReply Direct Link To This Post Posted: 25 February 2017 at 2:13am
ive been going back and forth  between the invader    an extended cyclops  but possibly    dragging out the path length  for more extension   or sadly bfm tuba 60s 
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parabox View Drop Down
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Points: 20 		Post Options Post Options   Thanks (0) Thanks(0)   Quote parabox Quote  Post ReplyReply Direct Link To This Post Posted: 25 February 2017 at 2:48am
 part of the problem is also flexibility     with putting horns inside witch has me considering tapped horns
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tv00 View Drop Down
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Points: 1886 		Post Options Post Options   Thanks (0) Thanks(0)   Quote tv00 Quote  Post ReplyReply Direct Link To This Post Posted: 27 February 2017 at 6:05am
I had the exact same considerations, now I have 4 pcs CBe-18 & 4 pcs invaders, I didn't load the invaders yet though (you're welcome here:-)
I feel slightly embarrassed about moving so slow, yet it's not like I'm not doing anything:-)
Well, after A/B I will decide, the plan is to upscale the design to 120x80 to fit a pallet, but the 18-1500 invader has a bit too much wasted space I think...
www.facebook.com/babysoundsystem
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Points: 6 		Post Options Post Options   Thanks (0) Thanks(0)   Quote 16062024 Quote  Post ReplyReply Direct Link To This Post Posted: 25 June 2024 at 12:04pm
Hey there,

I just build an Invader-Bin, loaded with the Fane 18XS.

Just really roughly i used this Cutoffs :
LP Butt 18dB @35Hz ; HP Butt 24dB @70 Hz

I took around 10 measurements in my workshop with different sub and mic positions. I just wanted to get a rough 'look' at the finished work.

I really like how the bass performs for now, but I am a bit concerned about the steep rolloff at 50Hz. I want to build 3 more, so I have 4 in total.

My question now is: is there someone with a stack of 4 (or more) who has some measurments or can speak from experience on how much they go deeper in stacks of 4 (or more) ?

Im really scared to be disappointed after building so many and then realising that I wont reach 35-40Hz properly.

With all the best,
C.



Edited by 16062024 - 11 July 2024 at 8:39pm
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Piato75 View Drop Down
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Points: 22 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Piato75 Quote  Post ReplyReply Direct Link To This Post Posted: 10 August 2024 at 11:47pm
Hello, 

You definitely have to use them in a stack of 4 or more and you'll reach 40hz 

Curious to see your measurements even with one cab :)
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immortal View Drop Down
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Points: 466 		Post Options Post Options   Thanks (1) Thanks(1)   Quote immortal Quote  Post ReplyReply Direct Link To This Post Posted: 18 September 2024 at 12:32pm
I took some measurements of some Letterbox Invaders yesterday, unsure of the letterbox size or rear chamber volume but I will find out soon.

I could only fit 3 in the van so unfortunately don't have measurements of 4 but I will hopefully get some soon.

Blue is 1
Green is 2
Purple is 3
Orange is a reference sealed speaker with a RCF LF18G401



Setup
Cemetery Sounds
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Piato75 View Drop Down
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Points: 22 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Piato75 Quote  Post ReplyReply Direct Link To This Post Posted: 01 October 2024 at 11:28pm
Thanks for sharing !

Should hit 40-41hz @-3db with four 

What driver are they equipped with ?
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Piato75 View Drop Down
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Points: 22 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Piato75 Quote  Post ReplyReply Direct Link To This Post Posted: 30 June 2025 at 3:58pm
I’ve taken some measurements of mine — SPL not calibrated, mic placed at 1m.
The Invaders are built with the original baffle with the half-circle cutout and holes, and are loaded with Fane 18XS drivers.

The response doesn’t really match the Hornresp simulation, so I might consider swapping them for different drivers as they are not horn drivers anyway.

@immortal, which drivers are you using?
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