Seas Prestige FU10RB H1600-08 4" Full Range - new at Madisound - Page 2 - diyAudio
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Old 4th September 2012, 04:08 PM   #11
chrisb is offline chrisb  Canada
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Quote:
Originally Posted by larryldspkr View Post
Low SPL, narrow bandwidth, high price! there are better choices out there! Just saying!


hard to argue with that
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Old 5th September 2012, 04:47 AM   #12
GM is online now GM  United States
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Originally Posted by RickH View Post
GM - thanks for the advice. So for this driver a box to the dimensions you specify, open-ended at the bottom, would constitute a TL enclosure with nothing in the box except the stuffing?

If this is correct, what would be the effect of attaching a larger heavy base to the bottom and having the same size opening at the front (or back) of the enclosure instead of the bottom?

Thank you,

Rick
You're welcome!

Correct.

That's fine if you make the pipe longer by however much the slot height opening is, which will be 3.375" or 4" depending on which side it is.

GM
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Old 19th September 2012, 09:59 AM   #13
RickH is offline RickH  United States
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Default Just one more question about the FU10RB

Hi GM,

I've read somewhere that a TL generally extends the lower frequency response by about 1/2 octave. From my understanding that means the FU10RB in the TL enclosure mentioned earlier would yield a frequency response in the Mid-80s. Is this correct?

Or, if not around 80 Hz, what could I expect? I understand a TL would not magically transform the FU10RB into a pair of floor-shakers but would hope for a bit lower in-room response than 100 Hz.

I guess one way to look at it is they (FU10RBs) would be something to play around with. I figure I could at least make a small full range version of the old Radio Shack Minimus 7 (or better?). Thanks again for your help.

Rick
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Old 19th September 2012, 11:24 AM   #14
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When looking at the published FR of this speaker, it makes me wonder all over again why people would want to use full range speakers, even apart from the obvious issues they have with beaming. This same driver with an el cheapo tweeter and a simple xover is likely to do a lot better.
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Old 19th September 2012, 12:02 PM   #15
RickH is offline RickH  United States
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Default I understand!

As mentioned in an earlier post, I am also beginning the think these drivers are intended for use with a subwoofer which I do not prefer. I particularly want to build a small speaker using Seas or Scan-Speak drivers with decent bass response. I figure somewhere around 70 Hz would be good.

As a result, I'm leaning toward a building a small two way using one of the Seas 12 cm or 15 cm woofers and tweeter.

Thanks for your comments.
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Old 19th September 2012, 01:08 PM   #16
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Quote:
Originally Posted by vacuphile View Post
When looking at the published FR of this speaker, it makes me wonder all over again why people would want to use full range speakers, even apart from the obvious issues they have with beaming. This same driver with an el cheapo tweeter and a simple xover is likely to do a lot better.
Then why do you come to this forum when you obviously think that posters here are completely wrong? There are forums for multi-way speaker where you would be more comfortable. I for one will maintain that a 4" mid-tweet over a suitable woofer produces the best sound for my music.

Bob
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Old 19th September 2012, 02:32 PM   #17
RickH is offline RickH  United States
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Default Hello Mr. Brines!

And thanks for looking. I am interested in the FU10RB because:

1. I really want to build something other than a typical 2- or 3-way system
2. I've never heard a full-range system and,
3. I would like to try something using Scan-Speak or Seas drivers.

To me the FU10RB looks like a good starting point and, as you have noticed, some disagree. I'm certain Seas put a lot of R&D into the design of this driver and would like to try a pair.

Do you think these drivers, provided I put them is a suitable enclosure as suggested by GM, would be a good introduction into full-range drivers?

I am also interested in the Seas FA22RCZ but figure it best to start out slow and try to learn a bit along the way.

I appreciate any advice or comments. Thanks,

Rick

P.S. - Thank you for all the information available on your website.
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Old 23rd September 2012, 03:29 AM   #18
GM is online now GM  United States
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Quote:
Originally Posted by RickH View Post
Hi GM,

I've read somewhere that a TL generally extends the lower frequency response by about 1/2 octave. From my understanding that means the FU10RB in the TL enclosure mentioned earlier would yield a frequency response in the Mid-80s. Is this correct?

Or, if not around 80 Hz, what could I expect? I understand a TL would not magically transform the FU10RB into a pair of floor-shakers but would hope for a bit lower in-room response than 100 Hz.

I guess one way to look at it is they (FU10RBs) would be something to play around with. I figure I could at least make a small full range version of the old Radio Shack Minimus 7 (or better?). Thanks again for your help.

Rick
OK, but I know from many others and my experience that as stated, this is generally an assumption that is at best only accurate for a specific type of TL alignment.

WRT this driver, its motor is so weak that there’s very little BW to actually load, hence the increased mid-bass hump, so any LF extension will be rolled off, though backed up against a wall and especially in a corner, the perceived bass can be surprisingly strong for a tiny driver.

Regardless, the alignment I posted earlier yields an I.B. response except better damped and should perform to the dashed blue line if setting on the ground out in a large field [2 pi space].

The red line sim is a MLTL you can cobble one together to see if its limited LF extension suits you and you can always extend it by increasing the vent length with the tradeoff of a more rolled off response.

L = 33”
CSA = 64.71”^2 [suggest 12.96” W x 8” D]
Zdriver = 11.5”
Zport = 31.5”
Rport = 1.5”
Lport = 0.75”
Density = 0.25 lbs/ft^3 of polyfil

All dims i.d. and approximate.

Note that this is only minimally damped, so can be smoothed more if need be at the expense of an earlier bass roll off. Not many ‘free lunches’ in audio design.

GM
Attached Images
File Type: gif Seas Prestige FU10RB-H1600-8 AlphaTL, MLTL.gif (6.6 KB, 367 views)
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Old 22nd April 2013, 10:21 AM   #19
juanito is offline juanito  Europe
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Any impressions about the fu10rb's sound in sealed box?
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Old 24th April 2013, 03:27 PM   #20
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Default Stack em high...but not very cheap!

I just posted this on another thread but it seams to be appropriate with this Seas driver too...

" A great advantage of full range drivers is they can be DIY'd as modules, this can save money as you never need to upgrade or sell / give away old speakers, just keep adding more modules.

Just build a pair of simple sealed stackable box's with the right volume and internal damping for your chosen driver and cross them over to a sub ( 100Hz or below) or a decent bass / mid if crossing over up to 300Hz and you are up and running.
Then as time and funds allow, and IF(broad church of listeners and all that!!) you feel the need for greater dynamics / lower distortion etc simply build another pair or two pairs and so on until you reach what ever level of performance your heart desires...Or you run of money!

This also is great if you move house or need to change listening rooms or add more rooms ie small system in kids room / kitchen and bigger system in lounge.
Just make sure the boxes are as small in height as possible as you need to minimise centre to centre driver spacing, esp with small or mini arrays that suffer from floor / celing bounce cancelations."

Hope this helps
Cheers
D.

PS Seas have very good quality control so if you do decide to stack em high the drivers will all blend and perform well.
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