Radio Shack 40-1197 (aka FE103) - Page 4

gmilitano · 12th May 2004, 08:26 PM

Quote:

Originally posted by Timn8ter
Removing the dust cap and installing a phase plug can help HF response.

With regards to the phase plug, is this a good idea? Given the cost of the plugs, would the money not be better spent on a tweeter which would help the HF response and extend the response to 20 kHz.

Timn8ter · 12th May 2004, 08:33 PM

For me, the phase plug smoothed out the response. Adding a tweeter wouldn't help this. The only time I miss the upper response is if I A-B with something, for example, side by side comparison with the Jordan JX92S. Dollar for dollar a tweaked 1197 is hard to beat. A good tweeter would probably cost more than the 1197 or the phase plugs.

SY · 12th May 2004, 08:40 PM

What did you do for a phase plug? Balsa and a lathe?

planet10 · 12th May 2004, 08:49 PM

Quote:

Originally posted by gmilitano
What is a phase plug?

Blatant Promo

http://cgi.ebay.com/ws/eBayISAPI.dll...tem=3095290500

dave

Timn8ter · 12th May 2004, 08:50 PM

Quote:

Originally posted by SY
What did you do for a phase plug? Balsa and a lathe?

http://cgi.ebay.com/ws/eBayISAPI.dll...tem=3095290500

gmilitano · 12th May 2004, 09:47 PM

Quote:

Originally posted by Timn8ter
For me, the phase plug smoothed out the response. Adding a tweeter wouldn't help this. The only time I miss the upper response is if I A-B with something, for example, side by side comparison with the Jordan JX92S. Dollar for dollar a tweaked 1197 is hard to beat. A good tweeter would probably cost more than the 1197 or the phase plugs.

I was thinking to cross over at 9kHz to avoid that peak. Dave also mentioned that suitable tweeter will cost more to ship than the cost of the tweeter.

To me this make sense, you avoid the peak and extend the range. is my logic flawed?
GM.

Timn8ter · 12th May 2004, 10:10 PM

It might be good to keep all the factors in mind. We're talking about a driver than costs $18CA for a new one, I paid $30US for four older ones delivered. As good as they are they can't be expected to perform as well as a Jordan. If you're going to spend $50 or more by the time you add a tweeter and crossover you're going to be better off buying a Fostex FE166.

planet10 · 12th May 2004, 10:50 PM

As far as i'm conncerned, the most important improvement with a phase-plug is the removal of (most of) the last vestiges of te upper midrange "honk" (ie male voices) that all the variations of this driver suffer from (in comparison to a tweaked FE103A, you can even hear that the FE108 has this).

A side effect is improved high frequency dispersion -- you do get a small bit of extension, but that is not the important thing.

dave

12th May 2004, 08:40 PM	#33
SY diyAudio Moderator Join Date: Oct 2002 Location: Chicagoland Blog Entries: 1	What did you do for a phase plug? Balsa and a lathe? __________________ If there's a sucker born every minute, where do the rest of them come from?

12th May 2004, 10:50 PM	#38
planet10 frugal-phile(tm) diyAudio Moderator Join Date: Oct 2001 Location: Victoria, BC, NA, Sol III Blog Entries: 5	As far as i'm conncerned, the most important improvement with a phase-plug is the removal of (most of) the last vestiges of te upper midrange "honk" (ie male voices) that all the variations of this driver suffer from (in comparison to a tweaked FE103A, you can even hear that the FE108 has this). A side effect is improved high frequency dispersion -- you do get a small bit of extension, but that is not the important thing. dave __________________ community sites t-linespeakers.org, frugal-horn.com, frugal-phile.com ........ commercial site planet10-HiFi p10-hifi forum here at diyA

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12th May 2004, 08:33 PM	#32
Timn8ter diyAudio Member Join Date: Jul 2003 Location: Seattle, WA	For me, the phase plug smoothed out the response. Adding a tweeter wouldn't help this. The only time I miss the upper response is if I A-B with something, for example, side by side comparison with the Jordan JX92S. Dollar for dollar a tweaked 1197 is hard to beat. A good tweeter would probably cost more than the 1197 or the phase plugs.

12th May 2004, 10:10 PM	#37
Timn8ter diyAudio Member Join Date: Jul 2003 Location: Seattle, WA	It might be good to keep all the factors in mind. We're talking about a driver than costs $18CA for a new one, I paid $30US for four older ones delivered. As good as they are they can't be expected to perform as well as a Jordan. If you're going to spend $50 or more by the time you add a tweeter and crossover you're going to be better off buying a Fostex FE166.