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Old 30th March 2006, 07:45 AM   #11
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Quote:
Originally posted by holdent
The Planet10 website advises against using phase plugs with the FE103E described here http://www.planet10-hifi.com/FE127.html because for the FE103E/126E/127E family;
I thought i'd updated that page. The FE103e is OK to install plugs in. With Andrew chimimg in, that is at least 2 people who have done it successfully.

We built the Fostex FE103 horn and weren't very happy with it. A buschhorn II is a better bet. The RonHorn A126 with an FE126 is even better -- quite a bit better. And if i have the same success tweaking the FE126 as the FE127 i did earlier this week it will be even better yet.

dave
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Old 30th March 2006, 12:32 PM   #12
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Holdent, thanks for the advice. These were meant as a first foray into speaker building and as such intended to be cheap but worth the effort.
As I have said, I can get MDF precision cut at work so that chore is spared me! I did not think the cabinets were that bad to build, they went together well and with little effort. Patience was another thing.
I'll see how these go and move onto something more capable as funds allow.
Cheers
Paul
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Old 30th March 2006, 02:40 PM   #13
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Quote:
Originally posted by ejfud
Cal, I've been thinking about using these in a different way. Would you care to share what you have added to the 103's for highs and lows.

Thanks for your any help you could give and pictures would be even better.

Gary
Hi Gary,
I run a Coral version of the F103 from 1K to 10K, first order.
I added an old Foster tweeter for the top, XO at 10K first order.
I added an MCM poly woofer for a midbass, XO 100 - 1000Hz
I have the TB W6-1139 with drone cone and plate amp all in one neat little package.

This is the back
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Old 30th March 2006, 02:41 PM   #14
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And the front
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File Type: jpg finished front.jpg (83.0 KB, 283 views)
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Old 30th March 2006, 08:03 PM   #15
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Those look very cool! Does the FE103 sound good as the midrange? Is the sub and passive in the same cabinet or isolated.

I wish I had a better understanding of schematics and electronics in general so I had an idea of what you are talking about in the crossovers. I really think the FE103 would be great in this role. I just don't have the ability to make the crossovers.

I have 2 pairs of the old Foster 103's at my disposal for a project like this, but my lack of knowlegde has held me back. I was thinking of using a super tweeter and a small sub to make a quazi 3 driver system. Any thoughts?

Thanks again for the great pictures.

Gary
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Old 30th March 2006, 10:12 PM   #16
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Quote:
Originally posted by ejfud
I have 2 pairs of the old Foster 103's at my disposal for a project like this, but my lack of knowlegde has held me back. I was thinking of using a super tweeter and a small sub to make a quazi 3 driver system. Any thoughts?
They make great extended range mids and respond well to tweaking. Which variants do you have?

dave
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Old 30th March 2006, 10:39 PM   #17
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I'll have to look at them. They both came out of Tunnel Reflex speakers and have different numbers on the back. I'll look later tonight and post the info.

Gary
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Old 30th March 2006, 11:38 PM   #18
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1st set says 1ORG11 & 04-45 made in Japan

2nd set says 5410182 & F-HA-E1

What if any difference is there between the drivers and which pair should I keep?

Gary
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Old 31st March 2006, 02:15 AM   #19
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Quote:
Originally posted by planet10

The FE103e is OK to install plugs in. With Andrew chimimg in, that is at least 2 people who have done it successfully.

We built the Fostex FE103 horn and weren't very happy with it. A buschhorn II is a better bet.
dave
I'm curious about the shape of phase plugs—most of them seem to taper to points. If they "essentially halve the distance from one edge of the cone to the other", does the point of that tip, in effect, put a hard-edged point of diffraction around that halved-cone?

Would a phase plug with a domed-top sound better?

(I have the FE103e in MDF zigmahornets. The dustcap of one was mod'ed by little fingers, so I've been thinking about phase plugs for both. And, either plywood Buschhorn IIs or a set of mini-BIBs are going to be their next homes.)
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Old 31st March 2006, 02:20 AM   #20
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Quote:
Originally posted by ejfud
Those look very cool! Does the FE103 sound good as the midrange? Is the sub and passive in the same cabinet or isolated.
Hi Gary,

The woofer is in a separate cabinet from the midbass, the mid is OB and yes I think it sounds very good. planet10 does a great job making an already good driver even better.
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