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-   -   Need help guys...want to make a horn box (http://www.diyaudio.com/forums/subwoofers/161123-need-help-guys-want-make-horn-box.html)

pat allen 11th February 2010 09:28 PM

Need help guys...want to make a horn box
 
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Ok, i know how to build power amp but not horn boxes, or powerfull sub boxes, even if i did so in the early 90's for cars (bandpass and ported only).

The deal is, i have 1 big power amp (1200w) and a 12 inch speaker capable of 3000w peak supposedely.

I want to make a semi horn box that will fill up a 20hz-100hz range or so for home theater with a lot of output (freq range may change).

I would like to make something like pictured. I dowloaded the hornresp programm but am totaly lost at to where to start entering parameters.

I have all the parameters of the sub itself. Please dont fire me if it sounds simple and stupid...let me know where i can start.

Rademakers 11th February 2010 09:45 PM

Guide to WinISD Pro and Hornresp - Speakerplans.com Forums - Page 1

Best regards Johan

littlemike 11th February 2010 10:27 PM

Here is another tutorial - though this is for front-loaded horns:

Simple Offset Driver HornResp Tutorial - How to design your own Bass Horn - AVS Forum

pat allen 11th February 2010 10:34 PM

thanks for the reply, keep them coming !!

here is the primary speaker parameters if someone ever want to try loading them up in the programm (which i still didnt masterised how to do it :( )
i have winISD and it comes with a low fz at 24hz with a ported box.

paramter of the speaker:
fs 29hz
vas 45L
QMS 7,89
QES 0,5
QTS 0,47
dia 12 inches
max excursion is 65mm

littlemike 11th February 2010 11:50 PM

Simple Offset Driver HornResp Tutorial - How to design your own Bass Horn - AVS Forum

This covers parameter entry.

Rademakers 12th February 2010 12:48 AM

Do you have more T/S-parameters, such as Re and Le?

Best regards Johan

pat allen 12th February 2010 12:55 AM

Quote:

Originally Posted by Rademakers (Post 2082420)
Do you have more T/S-parameters, such as Re and Le?

Best regards Johan

its a dual coil at 3.7 ohm
3.71mh at 1khz
1.67 at 20khz

dan stanton 12th February 2010 03:15 AM

A 3000 watt 12' speaker? Wow! What is the throw of the voice coil?

NEO Dan 12th February 2010 03:31 AM

Yea what driver is this???

GM 12th February 2010 09:03 AM

1 Attachment(s)
Quote:

Originally Posted by pat allen (Post 2082213)
I want to make a semi horn box that will fill up a 20hz-100hz range or so for home theater with a lot of output (freq range may change).

This driver isn't efficient enough for high output at low distortion in a simple reflex, but if it has at least 15 mm of Xmax, then it will in theory do the DD/DTS/THX 115 dB reference at 1m/400 W, but this is based on the listening position, so either some room gain or more Xmax will be required to meet it.

Here's one like you want, but FWIW, a ducted port alignment is theoretically slightly more acoustically efficient in slightly less bulk.

GM

PS: driver brand/model for my records please........


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