Need help guys...want to make a horn box

[pat allen]

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]

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

Best regards Johan

[littlemike]

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]

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]

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

This covers parameter entry.

[Rademakers]

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

Best regards Johan

[pat allen]

Originally Posted by Rademakers

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]

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

[NEO Dan]

Yea what driver is this???

[GM]

Originally Posted by pat allen

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........