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SUPPORT FORUMS FOR DECWARE SPEAKER PLANS >> DECWARE Imperial support forum >> fostex fe167e in a scaled imperial?
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Message started by 60ndown on 01/15/06 at 14:12:22

Title: fostex fe167e in a scaled imperial?
Post by 60ndown on 01/15/06 at 14:12:22

would it work? how low would they go? 40hz 35? 28? im thinking about a reasonable sized pair of floorstanding speakers (4' x 1.5' x 1.5?) and useing my 2 year old perfect foxtex drivers, what could i expect as an end result? would a tl desighn yeild better results?

Title: Re: fostex fe167e in a scaled imperial?
Post by boydon_lepasci on 01/17/06 at 01:04:22

I would not try scaling an Imperial. There should be plenty of designs for a back horn for every Fostex model. When it comes to a real horn, its best to use one designed for a specific driver. If you're up to the math you can pick pretty much any type of enclosure. There is plenty of info and software to help at:

http://www.quarter-wave.com

Title: Re: fostex fe167e in a scaled imperial?
Post by footstony on 01/17/06 at 03:38:03

60ndown,

You would need to scale the the imperial from 40Hz to around 60Hz as the free air res frequ. of the fe126e is 70Hz. you may also need to make the horn longer as the fe126e has a small optimum throat size. The compression chamber will also need to be made smaller to match the throat and to compensate for the fe126e's decreasing output at low frequencies.

see my crazy experiments here

http://au.geocities.com/footstony/half80.html

Regards Philip

Title: Re: fostex fe167e in a scaled imperial?
Post by 60ndown on 01/17/06 at 15:10:39

thanks guys, math n physics ill leave to you, guess if i want to break my tools out ill look for some plans somwehere.

Title: Re: fostex fe167e in a scaled imperial?
Post by DirtDawg on 01/17/06 at 15:30:56

60ndown wrote on 01/17/06 at 15:10:39:

thanks guys, math n physics ill leave to you, guess if i want to break my tools out ill look for some plans somwehere.

I think the Imperials are awesome. I'm just not sure you should try to scale down an Imperial. I'm afraid the magic will also be scaled down.

Moving right on to physics ..... I also think you should avoid a small driver, back loaded horn cab, that exits in the front. There is a reason why the Busch Horn is so popular or the Hornshoppe horns, too. I think it has to do with (insert complicated techno-babble here) and the fact that you will sit closer to these and any phasing anomalies will be easier to hear.

Title: Re: fostex fe167e in a scaled imperial?
Post by J_Rock on 01/17/06 at 21:54:24

I would cut the width down and make the chamber smaller for the smaller driver. like a 5 foot tall 6 inch wide(or whatever the driver is) imperial. Would look cool for sure.

Title: Re: fostex fe167e in a scaled imperial?
Post by gexter on 01/21/06 at 05:32:52

Don't!
it would be a shame for the Imperial and the Fostex.

look at the J low if you want something big and productive for the Fostex.

IMHO