Spawn of Frugel-Horn

[planet10]

Did I miss a post where these are mentioned? If not, are you going to tell us what drivers you have in mind for these, or was that a teaser?

I think i even posted a 1st round thot experiment picture. A 2 L box.

Planned driver is the FF85K (only Fostex that will fit in a small enuff box). It also is the most interesting of the 3" with a Sigma-class surround.

dave

 

[germpod]

A tall thin box is what I was expecting, not an exact Zigma. I like tall boxes and there do not seem to be any tall designs for the fe127.

 

[Aengus]

scottmoose, dave - thank you. Sorry for my, um, momentary lapse from my, um, usual keen perception.

aengus

 

[GM]

For me the zigmahornet shaped enclosure for the fe127 is very exciting. I was going to start experimenting and increase the size of the original zigmahornet to try to get it to work with a friends fe127 drivers but if you have a similar one designed by the pro's then all the better.

Greets!

It really is too tall/skinny for best performance, but if they will be near a back wall, then with a CSA = ~35"^2 and ~1.875" dia. vent (assumes 0.5" thick material) and either some series resistance and/or a high output impedance amp it might perform OK:

GM

 

[germpod]

Thanks GM.

 

[loninappleton]

What is used to make the flare on the Harvey?

My thought is to use a 4" and 5" hole cutter then chamfer both cutouts
for as smooth as possible back wave. I have done this technique on another build with the FE127e in an MLTL with suprabaffle.

 

[thoburnse40]

I've never seen anything like this 'frugelben'. Have there been many built? How do they sound? How difficult would it be to scale them up for a 6 inch driver?

 

[planet10]

What is used to make the flare on the Harvey?

My thought is to use a 4" and 5" hole cutter then chamfer both cutouts
for as smooth as possible back wave. I have done this technique on another build with the FE127e in an MLTL with suprabaffle.

Flare on the driver rebate?

dave

 

[planet10]

I've never seen anything like this 'frugelben'. Have there been many built? How do they sound? How difficult would it be to scale them up for a 6 inch driver?

The Spawn family includes over a dozen members for drivers between 4 & 12:".

http://www.frugal-horn.com/spawn.html

dave

 

[loninappleton]

Flare on the driver rebate?

dave

Yes, certainly. It seems the only way to get some air around the cutout for the driver to perform in the Compression Chamber.

 

[planet10]

When you say flare that usually refers to the shape of the horn biys... we use a 45 degree champher bit after curring the hole & rebate with the CNC machine (but a hole saw would do)

dave

 

[loninappleton]

When you say flare that usually refers to the shape of the horn biys... we use a 45 degree champher bit after curring the hole & rebate with the CNC machine (but a hole saw would do)

dave

No CNC in my part of town-- I've never even seen one. And my hand tools are minimal to boot. My routing chores are done with one of those zip tool kits and a $6 USD bit. Fortunately I know someone with a table saw.

 

[IowaDave]

I guess it is time for me to quit lurking. Here are a couple pics from this weekend. This is my first full range project, let me know what you all think. (obviously not complete yet)

An externally hosted image should be here but it was not working when we last tested it.

An externally hosted image should be here but it was not working when we last tested it.

An externally hosted image should be here but it was not working when we last tested it.

 

[aquapiranha]

Excellent, my sachiko's will be making an appearance soon (I hope!) My advice to anybody building a largish speaker?...

A, Get a table saw.

B, If you do not have a table saw, beg borrow or steal one.

C, get a table saw. If you do not have one see point B.

No kidding..lol

I DO NOT have a table saw, but I do have a jigsaw that almost melted and a few not so straight cuts...

 

[Cal Weldon]

If a table saw is not in the offing, a circular saw and sawboard (or straightedge) make an excellent replacement. I have done many a cut on my tailgate when a table saw was not practical and can attest to the quality of cut. After all, it's all in the blade.

 

[Ray Collins]

Cal,
I agree. It is especially handy when ripping full length pieces from a 4' x 8' sheet of plywood. Plywood cross cuts of the full 48" width are a cinch when you add a right angle arm to your sawboard.

Ray

 

[aquapiranha]

Chaps, can you tell me what a saw board is? I am by definition a complete and utter n00b !

Thanks.

 

[Bob2]

Just google saw board and you'll get complete instructions

Bob

 

[aquapiranha]

Thanks guys, I have never even heard of one before!,,

http://members.aol.com/woodmiser1/sawbd.htm

 

[loninappleton]

Excellent, my sachiko's will be making an appearance soon (I hope!) My advice to anybody building a largish speaker?...

A, Get a table saw.

B, If you do not have a table saw, beg borrow or steal one.

C, get a table saw. If you do not have one see point B.

No kidding..lol

I DO NOT have a table saw, but I do have a jigsaw that almost melted and a few not so straight cuts...

This is off topic, but the speaker building hobby has caused me to try to figure out how community workshops can be established again in towns and cities. In the early 60's there were Do It Yourself centers where tools were available. I figured that would be a good adaptive reuse of things like small older supermarkets which have been lying dormant. These could be used for such a purpose.


However I have yet to get community support from the government on this.