SEAS metal dome tweeter info needed - 27TBC/G & 27TBFC/G

RetroAudio · 2nd November 2006, 06:59 PM

Hey, I got a question about the SEAS 27TBC/G (w/o FF) and 27TBFC/G (W/FF) aluminum dome tweeters. I looked on Z 's tweeter site and got some good info about the 27TBFC/G and wondered if anyone has compared the 27TBC/G to it, either just with listening and/or measurement. They're both designed for resonance control and built the same (maybe), but one just has the FF added. I notice the 27TBC/G (w/o FF) does not have that 26khz peak which interests me, as well as the fact that I'm inclined to believe that all things being equal, drivers without FF sound better. Ok, I don't want any intense arguing here, just wondered if anyone had any experience with the non-FF unit. I did do a search but didn't find what I wanted, although I did get some really good stuff that helped get me to this point.

v-bro · 2nd November 2006, 07:08 PM

FF stands for "ferrofluid"...

v-bro · 2nd November 2006, 07:23 PM

When ferrofluid was first introduced every brand rushed into using it. Tweeters with dome construction were never capable of handling as much power as with the fluid. At a certain point many tweeters were not even available anymore without ferrofluid.

Seas however was the first large manufacturer to produce them without the fluid again. Testing over extended periods of time the FF models showed less detail and efficiency. The dome's without the fluid tend to sound better for a longer period of time and are nowadays better in power capability due to modern construction. (allowing more dome-displacement and better cooling through openings or VC carrier/dome material/treatment).

A metal-dome tends to cool very well... though I personally find soft/silk-domes more pleasant to my ears...

sdclc126 · 2nd November 2006, 08:27 PM

The 26khz peak is inaudible and therefore irrelevant.

I haven't heard either unit but am planning on building Zaph's BAMTM. I'm erring on the side of caution knowing that the 27TBFCG is the overall winner at any price (of all he tested).

There may be no audible differences between the two, and you probably won't go wrong either way.

slogan2112 · 3rd November 2006, 03:30 AM

I had the same questions. Just an FYI, the latest datasheet from Seas shows the 27TBC/G does have the peak 27TBC/G.

AutoAudio · 3rd November 2006, 05:54 PM

"Just an FYI, the latest datasheet from Seas shows the 27TBC/G does have the peak"

I guess that's unfortunate if you have a dog.

v-bro · 3rd November 2006, 06:09 PM

Especially if it's a "purist dog"...

"no audible difference" I think applies here.....

2nd November 2006, 06:59 PM	#1
RetroAudio diyAudio Member Join Date: Mar 2004 Location: Everett, WA	SEAS metal dome tweeter info needed - 27TBC/G & 27TBFC/G Hey, I got a question about the SEAS 27TBC/G (w/o FF) and 27TBFC/G (W/FF) aluminum dome tweeters. I looked on Z 's tweeter site and got some good info about the 27TBFC/G and wondered if anyone has compared the 27TBC/G to it, either just with listening and/or measurement. They're both designed for resonance control and built the same (maybe), but one just has the FF added. I notice the 27TBC/G (w/o FF) does not have that 26khz peak which interests me, as well as the fact that I'm inclined to believe that all things being equal, drivers without FF sound better. Ok, I don't want any intense arguing here, just wondered if anyone had any experience with the non-FF unit. I did do a search but didn't find what I wanted, although I did get some really good stuff that helped get me to this point.

2nd November 2006, 07:08 PM	#2
v-bro diyAudio Member Join Date: May 2006	FF stands for "ferrofluid"... __________________ Max. cone displacement can be several foot on any speaker!Too bad it can be done only once......

2nd November 2006, 07:23 PM	#3
v-bro diyAudio Member Join Date: May 2006	When ferrofluid was first introduced every brand rushed into using it. Tweeters with dome construction were never capable of handling as much power as with the fluid. At a certain point many tweeters were not even available anymore without ferrofluid. Seas however was the first large manufacturer to produce them without the fluid again. Testing over extended periods of time the FF models showed less detail and efficiency. The dome's without the fluid tend to sound better for a longer period of time and are nowadays better in power capability due to modern construction. (allowing more dome-displacement and better cooling through openings or VC carrier/dome material/treatment). A metal-dome tends to cool very well... though I personally find soft/silk-domes more pleasant to my ears... __________________ Max. cone displacement can be several foot on any speaker!Too bad it can be done only once......

2nd November 2006, 08:27 PM	#4
sdclc126 diyAudio Member Join Date: Jan 2005 Location: San Diego, CA	The 26khz peak is inaudible and therefore irrelevant. I haven't heard either unit but am planning on building Zaph's BAMTM. I'm erring on the side of caution knowing that the 27TBFCG is the overall winner at any price (of all he tested). There may be no audible differences between the two, and you probably won't go wrong either way. __________________ Soft Dome

3rd November 2006, 06:09 PM	#7
v-bro diyAudio Member Join Date: May 2006	Especially if it's a "purist dog"... "no audible difference" I think applies here..... __________________ Max. cone displacement can be several foot on any speaker!Too bad it can be done only once......


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3rd November 2006, 03:30 AM	#5
slogan2112 diyAudio Member Join Date: Dec 2003 Location: austin, tx	I had the same questions. Just an FYI, the latest datasheet from Seas shows the 27TBC/G does have the peak 27TBC/G.

3rd November 2006, 05:54 PM	#6
AutoAudio diyAudio Member Join Date: Nov 2005 Location: Boston	"Just an FYI, the latest datasheet from Seas shows the 27TBC/G does have the peak" I guess that's unfortunate if you have a dog.

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