Absolute best box for 206e? Sachico vs. Neviges vs. Bruce vs. Chang - diyAudio
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Old 20th February 2009, 04:54 AM   #1
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Default Absolute best box for 206e? Sachico vs. Neviges vs. Bruce vs. Chang

I have been making speakers for a little while now. Recently I did the whole proac clone thing, and while I really like the results, these speakers don't really capture the magic I remember from my first project....full range fostex 206e!

The first cabinet I made for these was a small bass reflex as suggested by they fellow I bought the drivers from. No bass, no midbass, but dynamic in a way that I found completely thrilling.

Later, I tried MJK's transmission line project. These sounded fairly balanced, but I feel like the large amounts of stuffing and the BSC circuit really cut down on the liveliness of the speaker.

So here I am in a new place with a spouse who actually thinks it would be cool if we had speakers the size of industrial refrigerators. I have a big long room with decently high ceilings.

My question here is this: what is the ultimate box for this speaker?

The options as I see them:

These beautiful german double-horns
No measurements on them, of course, but the shape is delightful.

Moving along,
Onur's horns.
Or;
The frugal horn Bruce

These designs are BVRs, of course. Everything I have read about the 206e indicates that it would be happiest in a true BL-horn. (There is another one called the chang which is considerably easier to build - I am considering this as well.)

Finally, the ones I least want to build but most want to have, the Sachiko.

I have been reading up on the subject, and people seem to really like the Sachiko horn. It seems to mate well with the 206e.

Finally, my questions:
1. Are the 206e's really suitable for the BVRs?
2. Will the Sachiko require any BSC? If so, what will I need to do?
3. Are there any other options, specifically, is there anything that will top the Sachico?

I'm looking to recapture the sizzle and dynamics of the fullrange experience, and it seems that the Sachikos do this while adding an element of scale and drama.

Extra credit:
4. The 206es have some response issues I am familiar with - will phase plugs even most of this out, or will further electronic intervention be required in a BLH design such as sachiko?
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Old 20th February 2009, 06:54 AM   #2
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Default Re: Absolute best box for 206e? Sachico vs. Neviges vs. Bruce vs. Chang

Quote:
Originally posted by n_martin
Finally, the ones I least want to build but most want to have, the Sachiko.

I have been reading up on the subject, and people seem to really like the Sachiko horn. It seems to mate well with the 206e.

Finally, my questions:
1. Are the 206e's really suitable for the BVRs?
2. Will the Sachiko require any BSC? If so, what will I need to do?
0/ Except for having lots of pieces, Saciko is probably the easies to build.

1/ 206 can be stretched into a BVR, but if you end up having to use series R, (in my experience) you'll give up some of the dynamics... eprobably better to start with 207.still something to be said about curvy bruce.

Click the image to open in full size.

2/ It shouldn't. Horn gain should give all the compensation required. You actually have to be wary of getting them too close to the wall-- you might have to artificially roll of the bottom.

dave
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Old 20th February 2009, 07:58 AM   #3
CLS is offline CLS  Taiwan
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Default Re: Re: Absolute best box for 206e? Sachico vs. Neviges vs. Bruce vs. Chang

Quote:
Originally posted by planet10

....

You actually have to be wary of getting them too close to the wall-- you might have to artificially roll of the bottom.


What a waste!

I mean, we build the horn for the most gain available, don't we? If so, why not build a front horn for the mids? That brings us a compound horn.

Say, the topic is "absolute best", has anyone build a big compound horn like Opus1 or TP1 for any Fostex?
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Old 20th February 2009, 09:23 AM   #4
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Default Re: Re: Re: Absolute best box for 206e? Sachico vs. Neviges vs. Bruce vs. Chang

Quote:
Originally posted by CLS
What a waste!
Why?

dave
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Old 20th February 2009, 10:51 AM   #5
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Default Re: Re: Absolute best box for 206e? Sachico vs. Neviges vs. Bruce vs. Chang

Quote:
Originally posted by planet10 still something to be said about curvy bruce.
Wow! Dave, how can one find out more about Curvy Bruce?
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Old 20th February 2009, 11:12 AM   #6
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It was a design study for a fellow that was considering laminating up 1 1/2" solid cedar "sticks". That is as far as it went... have you seen the thread with Aengus' Curvy Harvey? You could do it that way too.

dave
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Old 20th February 2009, 11:34 AM   #7
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Quote:
Originally posted by planet10
...have you seen the thread with Aengus' Curvy Harvey? You could do it that way too.
Aengus' "canoes" sound pretty good. I'll x2 that option

Cheers!
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Old 20th February 2009, 12:24 PM   #8
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Default Re: Re: Re: Absolute best box for 206e? Sachico vs. Neviges vs. Bruce vs. Chang

Quote:
Originally posted by CLS
What a waste!
They're a high-gain catenoid back-horn designed to be used away from room boundaries. Get them too near a rear-wall & they'll overpower the mids & HF. I'm not sure why that's 'a waste.' (?)
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Old 21st February 2009, 01:05 AM   #9
CLS is offline CLS  Taiwan
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"Overpower" should be a relative term, so I said <If so, why not build a front horn for the mids? > -- give some more gain to the mid, so the tonal balance can be levelled.
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Old 21st February 2009, 01:35 AM   #10
freddi is offline freddi  United States
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RCA-Fan's conical back loaded horn should be good --- if you can take its looks - the build below would look better imo if top and bottom didn't overhang - Bill did 13 builds to get it to satisfaction - I like the look of Planet10's double mouth horns better
if interested - ask Bill Woods for plans at acoustichorn.com
Click the image to open in full size.
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