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
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
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.
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.
Bricolo said:
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
Re: Re: SEAS standard line, and ugly frequency response curves
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$, reasonable efficiency, and a smoooth FR curve.
Excels aren't in my pricerange.
What do you think about the 27TFFC? I think I'll go for this one for the tweeter.
ScottRHinson said:
I'm looking for a 6 12" or 7", something easy to filter; so poly pr paper. I'm more focused on paper.
Price under 70$, 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.
If someone has, or knows where I can find other measurements of the seas midranges, I'll be thenkfull to him 😉
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
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
SimontY said:
Oops, I think I simply skipped this one, since it's not on seas's website
I'll chack in IT 😉
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
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
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.
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.
It looks good!
Too bad it has a so low Qts, not good for a transmission line. And this is the same for all the 17cm and 18cm seas 🙁
Too bad it has a so low Qts, not good for a transmission line. And this is the same for all the 17cm and 18cm seas 🙁
True re use in T/L units.
Nearly all newer 165mm units have parameters
optimised for bass reflex loading.
🙂 /sreten.
Nearly all newer 165mm units have parameters
optimised for bass reflex loading.
🙂 /sreten.
Hi,
our Westlake BBSM-6 have two SEAS P 17REs in them. Westlake has been using these for at least 15 years, with great success I would say. They run around $ 40 each, but don't expect any great bass response. I would suggest to go with at least two 10', unless you augment the 17cm with subs that go high enough (90 Hz).
Cheers
our Westlake BBSM-6 have two SEAS P 17REs in them. Westlake has been using these for at least 15 years, with great success I would say. They run around $ 40 each, but don't expect any great bass response. I would suggest to go with at least two 10', unless you augment the 17cm with subs that go high enough (90 Hz).
Cheers
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