How does this look

gperkins1973 · 28th January 2011, 01:18 PM

Hi there,

Ive been playing with hornresp for a while now and keep trying different drivers and started to feel like I was going around in circles to be honest. I have tried several drivers and found that the AV12X dual 2 ohm looks like it models pretty well so here is what I have come up with 2 off them in a 636 litre horn. Power is at 800 watts max before going over max excursion.

When you sample frequencies in spl mode it is showing good response down to 15hz and excursion at 15hz is only 18mm.

Would you mind having a look at it and let me know what you think.
I have had nightmares with the folding part as I just can't seem to get my head around it so any easy suggestions would be appreciated. I would be looking at something taller rather than wider.

cheers

Graham

epa · 28th January 2011, 02:53 PM

your model looks good.
looking @x-max is on 21 herz about 23 mm

,dont know whats the liniar x-max is?

epa · 28th January 2011, 03:07 PM

wow x-max is 23 mm acc to specs

impressive

gperkins1973 · 28th January 2011, 06:04 PM

The drivers have 23mm off xmax so I was more concerned with what frequency below 20hz was going over xmax.

I was thinking off building two off these but need them to be tall and max 30" wide but as I said the folding bit goes over my head.

cheers

Graham

chris661 · 28th January 2011, 06:16 PM

You're thinking of building TWO?

I don't know if that'll be impressive or straight out dangerous...

Still, good luck with it.

gperkins1973 · 28th January 2011, 06:20 PM

There is a very good reason ( I think ) for building two. And that is to better the current system I have which is two 15 cu ft FI Q18's. I built them so they have multi tunes. I have a 12.5hz, 17.5hz and 21.5hz tunes and winisd models one sub in the 17.5hz tune to 117db at 20hz. A single horn models about 125db at 20hz and that is with 800 watts instead off 1000 watts.

I prefer my 17.5hz tune which is why I would go for a horn with that kind off tune.

I have read that horns have alot less distortion and have more 40hz and up impact which is what I am looking for.

I just wish I could get my head around this folding lark. Maybe it will just click. I can use sketchup and have plotted a single long horn, I just can't get it in my head how to fold it.

cheers

Graham

epa · 29th January 2011, 01:31 PM

ill put something together ,30"wide and tall?

gperkins1973 · 29th January 2011, 02:21 PM

Just popped out.
Thats very kind off you.

cheers

Graham

epa · 29th January 2011, 03:21 PM

somethimg like this?
inside panels are 65 cm

side note compression ratio is 4:1 is a bit high

gperkins1973 · 29th January 2011, 03:31 PM

I thought for smaller drivers that was ok. What do you think would be the best compression ration for these two 12's

Looks nice by the way and what looks like a fairly simple fold to build.

cheers

Graham

28th January 2011, 02:53 PM	#2
epa diyAudio Member Join Date: Apr 2010 Location: amsterdam	your model looks good. looking @x-max is on 21 herz about 23 mm,dont know whats the liniar x-max is?

28th January 2011, 06:16 PM	#5
chris661 diyAudio Member Join Date: Feb 2008 Location: Lancashire Blog Entries: 7	You're thinking of building TWO? I don't know if that'll be impressive or straight out dangerous... Still, good luck with it. __________________ "Throwing parts at a failure is like throwing sponges at a rainstorm." - Enzo My setup: http://www.diyaudio.com/forums/multi...tang-band.html

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28th January 2011, 03:07 PM	#3
epa diyAudio Member Join Date: Apr 2010 Location: amsterdam	wow x-max is 23 mm acc to specs impressive

28th January 2011, 06:04 PM	#4
gperkins1973 diyAudio Member Join Date: Jun 2010	The drivers have 23mm off xmax so I was more concerned with what frequency below 20hz was going over xmax. I was thinking off building two off these but need them to be tall and max 30" wide but as I said the folding bit goes over my head. cheers Graham

28th January 2011, 06:20 PM	#6
gperkins1973 diyAudio Member Join Date: Jun 2010	There is a very good reason ( I think ) for building two. And that is to better the current system I have which is two 15 cu ft FI Q18's. I built them so they have multi tunes. I have a 12.5hz, 17.5hz and 21.5hz tunes and winisd models one sub in the 17.5hz tune to 117db at 20hz. A single horn models about 125db at 20hz and that is with 800 watts instead off 1000 watts. I prefer my 17.5hz tune which is why I would go for a horn with that kind off tune. I have read that horns have alot less distortion and have more 40hz and up impact which is what I am looking for. I just wish I could get my head around this folding lark. Maybe it will just click. I can use sketchup and have plotted a single long horn, I just can't get it in my head how to fold it. cheers Graham

29th January 2011, 01:31 PM	#7
epa diyAudio Member Join Date: Apr 2010 Location: amsterdam	ill put something together ,30"wide and tall?

29th January 2011, 02:21 PM	#8
gperkins1973 diyAudio Member Join Date: Jun 2010	Just popped out. Thats very kind off you. cheers Graham

29th January 2011, 03:21 PM	#9
epa diyAudio Member Join Date: Apr 2010 Location: amsterdam	somethimg like this? inside panels are 65 cm side note compression ratio is 4:1 is a bit high

29th January 2011, 03:31 PM	#10
gperkins1973 diyAudio Member Join Date: Jun 2010	I thought for smaller drivers that was ok. What do you think would be the best compression ration for these two 12's Looks nice by the way and what looks like a fairly simple fold to build. cheers Graham

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