Scanspeak 10" woofers

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#2
Subs

claudio,

Some years (10-11 maybe) ago, I built ~two 95 liter heavy sealed boxes for the SS 25W8565-00 - one layer each of 18mm mdf and baltic birch plywood. I never regretted it in terms of the SS sound quality. They sounded excellent as stereo subs.
Looking back, they were a highish Q box, somewhere ~.85 if irc, but they sounded very good with a plate amp/enclosure and propping up my mains for HT. Not a unit to blow your socks off, by any means, due to their limited SPL output (110 dB maybe?), but a very tuneful bass unit. Seated about 8 ft away and with room lift they seemed to go quite deep, and rolled off smoothly for integration above the 80 Hz crossover without muddying the mids.
Used in medium to small rooms they would work very well in a similar arrangement.

These days, however, there are many more bass/sub drivers to choose from, and the low bass needs are far more demanding. I would excercise caution on their use, or use multiples, if concert levels are a requirement.

Tim
 
#3
Hi Tim,
I didn't know the 25W8565-00 are so old! I thought the SD-1 motor was a recent innovation.
Anyway, in my willings I will use 2 10" woofer per speaker, and also use Linkwitz Transform in a sealed enclosure.
In my 10" woofer reasearch I couldn't find many drivers, taking into account my needs:

1) High Qms, >3.5
2) No poly cone
3) Low Le
4) EBP round 50
5) Low Fs
6) Enough Mms for closed box
7) > 86 sensitivity, the more the better
8) Usable till 400-500 Hz

As you can see, there aren't many options available in the woofer market today. The Peerless XXlS, for example, has a too high Le; moreover the use of 2 drivers nedd a serial or parallel connection, therefore the driver Re is a clue too.
 
#4
subs

claudio,

You are quite right about the SD-1 motor being a relatively new upgrade, but the TS parameters look quite similar on these newer versions vs their predecessors that I used. I guess Im dating myself...kinda old too.

I used these as subs only, so I had no need for the extended bandwidth you describe - up to 500 Hz. I crossed to a 6.5" Seas midbass (MTM), and the improvements to the midrange were immediately apparent, once relieved of bass duties.

I have no experience whatsoever with these units, but they looked good on paper - ha!. You probably know more about them than I do, but the comments over here, at least on their pro units, are favorable. These do lack the xmax of the SS.


http://www.ciare.com/pdf/catalogo/HW250.pdf

http://www.ciare.com/pdf/catalogo/HW320.pdf

Good luck in your quest.

Tim
 
#5
Hi,

I used 2 x 8565-01's in ~120L boxes in one of my projects.

The sound quality was excellent, but output was compromised. For music a sub was needed below 40Hz, and with dvd's they needed to be crossed at 80Hz for reference levels.

If you don't listen loud they will be fine down to the 20's.

Still one of the best midbass units I ever heard..

http://www.diyaudio.com/forums/showthread.php?s=&threadid=5868&perpage=10&highlight=&pagenumber=15

I still have some in room measurements somewhere if it helps...


Rob.
 
#12
Hello,

I am running a stereo pair of twin 25W8565-01 in 90 litre cabinets (total 4 drivers) as per the ariel woofer design. I tried a LT and was not really that happy. These drivers just don't have the xmax required. I am happy with them un-equalised for music. I tend to think of them as woofers, not sub-woofers. For HT I would like a little more down low.

I suggest looking at http://www.linkwitzlab.com/thor-intro.htm

Sigfied Linkwitz really knows what he is talking about. I suggest that his site is a great resource. I wish I had found it before building my Ariels, as I would have built his Orions for sure. Probably still will one day 🙂
 
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