New 15" Ported Horn |
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bitzo
Registered User Joined: 20 November 2007 Location: Italy Status: Offline Points: 977 |
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Great build Ceharden!
What driver do you use? Why do you put 2 little pieces of wood in the middle of the last 2 panels of the horn? One is tagged CE...... Could be braces? Could you post a frequency graph, please? |
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Hi_Varu
Registered User Joined: 17 January 2008 Location: Italy Status: Offline Points: 181 |
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nice..
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ceharden
The 10,000 Points Club Joined: 05 June 2005 Location: Southampton Status: Offline Points: 11776 |
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The driver is an RCF L15P300 and the bits of wood on the inside of the flare are indeed bracing.
The wood is quite cheap and not the strongest, also some is a bit warped so it needs a bit more bracing than if I was building from birch. Mouth braces are the next job.... I haven't done a frequency response plot yet, that will probably have to wait til the Speakerplans shootout. I could post the simulated response I guess... |
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Disco Stu
Old Croc Joined: 03 March 2005 Location: United Kingdom Status: Offline Points: 2487 |
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Was gonna say |
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All you need to know is:
Sensitivity + Power Handling - Power Compression = Max Output My acts: www.myspace.com/thebowiexperience www.myspace.com/scheisseelektronisches |
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ceharden
The 10,000 Points Club Joined: 05 June 2005 Location: Southampton Status: Offline Points: 11776 |
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Want to give the inside a wipe around with black paint before putting the mouth brace in. PITA to paint afterwards.
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bitzo
Registered User Joined: 20 November 2007 Location: Italy Status: Offline Points: 977 |
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Simulated response is good and could be interesting facing the simulation with the real response ;)
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Jake_Fielder
Old Croc Joined: 08 October 2007 Status: Offline Points: 4231 |
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Good stuff!
I have only just read the last part of this, my prototype should be ready tonight, then some testing over the weekend!
I may tune mine around 40 instead of 35 now... i have been thinking about it.....
how big is your port? (if you dont mind me asking!) i mean whats the cross sectional area, and can you hear any unwanted port noise? thats my concern as i have redesigned mine with a smaller port but the same tuning, for ease of building and so that "tweaking" the tuning afterwards is eaisier.
Jake
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ceharden
The 10,000 Points Club Joined: 05 June 2005 Location: Southampton Status: Offline Points: 11776 |
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Hi there!
My port is the width of the cab, so 55cm by I think it's about 7.5cm and 30cm long. I haven't heard any unwanted noise from the port, but I wouldn't expect to as it is quite large. I still haven't taken the cabs out to any gigs! |
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Jake_Fielder
Old Croc Joined: 08 October 2007 Status: Offline Points: 4231 |
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yes that is rather a whopper of a port!
my rear chamber is pretty small on my cab, so to get to the tuning i want i either need a small port which could have unwanted noise or a really long port, but theres not enough space with out using us loads of rear chamber space, and then it would need to be longer etc...
I suppose thats what prototypes are for ay?
Cheers for details, do you plan to use any eq? or use as is.
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ceharden
The 10,000 Points Club Joined: 05 June 2005 Location: Southampton Status: Offline Points: 11776 |
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Well without EQ it's pretty flat from 45-200Hz so none required probably!
My rear chamber is nearly 100L |
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philipbeyma
Registered User Joined: 06 June 2008 Location: Greece Status: Offline Points: 94 |
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very nice job keep going
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mhtplsh
Registered User Joined: 27 August 2007 Status: Offline Points: 112 |
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How about using 18" driver.
it looks of similar principle like wbin? How about the long throw? |
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