SEAS standard line, and ugly frequency response curves

[Bricolo]

Since I restarted looking for a 6 1/2" midbass for my future loudspeakers, I looked on some manufacturer's websites last week.

At first, I eliminated all the SEAS drivers, because the frequency response curves didn't look good, even for the paper and poly ones, supposed to have niver FR.


But today I realised something: the SEAS drivers aren't tested on a IEC bafle! It's precised in the datasheets. Some are tested alone, some are on a 12L box (no dimention given).
This certainly explains the bas FR curves. On a IEC bafle, like do many other manufacturers, they would have a smoother curve.


Has anyone else been aware of this?
Can I find the measurements on a IEC bafle somewhere?


Alex

[sreten]

Q1 - yes indeed - you should allways read the conditions
of measurements very carefully, the box volume used varies
depending on the driver, and some drivers are measured on
a baffle.

Q2 - unlikely to find measured on an IEC baffle, but you can
find alternative measurements for some drivers on the web.

/sreten.

[ScottRHinson]

Originally posted by Bricolo
Since I restarted looking for a 6 1/2" midbass for my future loudspeakers, I looked on some manufacturer's websites last week.

At first, I eliminated all the SEAS drivers, because the frequency response curves didn't look good, even for the paper and poly ones, supposed to have niver FR.


But today I realised something: the SEAS drivers aren't tested on a IEC bafle! It's precised in the datasheets. Some are tested alone, some are on a 12L box (no dimention given).
This certainly explains the bas FR curves. On a IEC bafle, like do many other manufacturers, they would have a smoother curve.


Has anyone else been aware of this?
Can I find the measurements on a IEC bafle somewhere?


Alex

Which Seas drivers are you looking at? I have used the T17/RE, P17RE/TV, W17EX001, 27TFFC, 27TDC and Millenium. I would use them all again except for maybe the P17RE/TV which sounded dry no matter what I did.

Scott

[Bricolo]

Originally posted by ScottRHinson



Which Seas drivers are you looking at? I have used the T17/RE, P17RE/TV, W17EX001, 27TFFC, 27TDC and Millenium. I would use them all again except for maybe the P17RE/TV which sounded dry no matter what I did.

Scott

I'm looking for a 6 12" or 7", something easy to filter; so poly pr paper. I'm more focused on paper.

Price under 70$, reasonable efficiency, and a smoooth FR curve.

Excels aren't in my pricerange.

What do you think about the 27TFFC? I think I'll go for this one for the tweeter.

[Bricolo]

If someone has, or knows where I can find other measurements of the seas midranges, I'll be thenkfull to him

[SimontY]

Hi Bricolo,

Why did you not heed my suggestion of the Seas H571 (otherwise known as W17PPI - when bought from Intertechnik)?

This is Seas standard, coated paper, 6.5", with good sensitivity, bass extension, smooth response, and just within budget. At least look at it! Like I said before, it does sound quite 'lively', but as you've not stated your tastes, it may be perfect - really detailed and tight sounding, occasionally dry you could say.


-Simon

[Bricolo]

Originally posted by SimontY
Hi Bricolo,

Why did you not heed my suggestion of the Seas H571 (otherwise known as W17PPI - when bought from Intertechnik)?

This is Seas standard, coated paper, 6.5", with good sensitivity, bass extension, smooth response, and just within budget. At least look at it! Like I said before, it does sound quite 'lively', but as you've not stated your tastes, it may be perfect - really detailed and tight sounding, occasionally dry you could say.


-Simon

Oops, I think I simply skipped this one, since it's not on seas's website
I'll chack in IT

[SimontY]

[p_ete2003]

Hi Bricolo,

I have made my 3-way loudspeakers with 2*Seas P17Rex and Dynaudio D-28 treble. Crossover freqs are 400Hz and 5000Hz.

I have measured the speaker in my room with pink noise.

The pictures are too large to attach here. I can send the pics to you by email if you like.

regards,
Pete

[sreten]

checkout the driver used here

http://www.deadwaxcafe.com/vzone/david/david.htm

The 27TFFC is a very nice tweeter - good choice

http://www.williamshart.com/k2.htm

Used here with the phase plug version of the above bass/
mid driver.

/sreten.