Dayton RS100S-8 4" Reference Shielded Full-Range Drivers?

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#4
I wonder if the T/S params have a typo? The listed paramters seem much more different than I expected (for a rookie) for the 8 and 4 ohm versions. For example, the Qts for the 8 ohm version is 0.82 but for the 4 ohm one it is 0.48. Does this seem right?
 
#6
I just did a quick search on the Internet and came up with a couple of postings over at DIYMobileAudio: http://www.diymobileaudio.com/forum/showthread.php?t=32656&highlight=Dayton+RS100-8 and http://www.diymobileaudio.com/forum/showthread.php?p=431648. Zaph tested a 8 ohm prototype and listed the results in his blog here: http://www.zaphaudio.com/blog.html (you have to scroll done to Feb 28 '08). In the DIYMoileAudio forum Zaph wrote about the 4 ohm prototype "It performs similarly but will have a slightly lower Qts, a couple dB higher SPL. Should be nice for the space challenged car installation". So I think that partly answers my question in my previous post about T/S param typo - it sounds like the typo is for the 4 ohm version.

Given the high Qts I wonder whether the best use for this driver is an open-back line array?

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Oops - just realized benchtester posted while I typed this...
 
#9
Jim -

Nice find. A guy has to keep his eyes open. Initially I saw it as Dave did til Holden mentioned OB line array.

Can't recall whose but recently a guy did an array with CSS FR125's that caught my eye .

These could be a poor mans alternative.

Bluto
 
#14
I ordered a pair of the 8ohm version last night. I'm going to use them in OB first off (go figure). Wanting to do proof of concept on some crossover stuff to see if my dream of an all Dayton Reference Series passive OB can happen, but I may knock together a set of test BiBs for them, too.

If the drivers turn out good, I'll probably want to try BiBs with the 4ohm version since they should be significantly smaller builds (even though the builds for the 8ohm aren't big by any BiB building standards), and saving space will be useful for implementing some dual path/mouth BiB concepts I've been knocking around. I'll also be wanting to try putting together an RS "stealth mod" for my living room speakers (read, drop in replacements for existing drivers in existing cabinets, maybe with a nice serial crossover to make them play nice; its stealthy because the wife will never notice, even though SQ should go up significantly and the bottom end extension drop 10-20Hz)

Anyway, I'll let you guys know what I think once I've gotten a chance to form some impressions.

Kensai
 
#17
My pair came in last night, though I didn't have time to do much more than listen to them raw. Didn't have anything with an appropriately sized cut out that I could just throw them into, so I just listened to them either firing up or sorta firing at me while laying on their sides.

First thing I noticed was yes, they really need alot of power. I've got a Panasonic X57 receiver along side my Gen2 T-amp now, so I've got plenty. Second, they are amazingly clear sounding, even when the cone and surround are moving enough that you can see it from a distance. Thirdly, they seem to be alot brighter, alot hotter from the upper mids on up than Zaph's measurements would indicate (I'm hoping getting them on baffles will help even this out). Fourth, raw drivers plus a little EQ gets useable response below 80Hz. Its just insane.

Oh, and did I mention they're really, really tiny?

Kensai
 
#19
Very well made. Very fancy. I've never seen anything quite like it in person. Only thing else I have that's this heavily built is a pair of B&G Neo3PDR planar tweeters, and they are much simpler mechanisms. I have high hopes for these things once I get them mounted into something.

Kensai
 
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