They are matching makes. I'll verify but I believe the S/N's are consecutive. As far as T/S, I just got WT3 and haven't tried it yet. It might take a little bit before I get a chance.
When I bought them I wasn't given any such info. The Alnico demag issue though is overstated in general. If they were used for pro audio use, which it is unlikely these were, then the chance of such is not very likely.
When I bought them I wasn't given any such info. The Alnico demag issue though is overstated in general. If they were used for pro audio use, which it is unlikely these were, then the chance of such is not very likely.
I've seen drivers with and without the demag issue. It's something you need to be sure of, via testing. I can only imagine how many people have mismatched speakers due to one having seen demagging and one not.
Fortunately, the WT3 is easy to use, see my review here:
http://www.enjoythemusic.com/diy/1108/dayton_wt3.htm
So you should have no trouble determining whether they're lossy on strength. If the woofer Qts seems high, then they've probably taken a hit.
Fortunately, the WT3 is easy to use, see my review here:
http://www.enjoythemusic.com/diy/1108/dayton_wt3.htm
So you should have no trouble determining whether they're lossy on strength. If the woofer Qts seems high, then they've probably taken a hit.
Coax1:
* f(s)= 59.22 Hz
* R(e)= 7.50 Ohms
* Z(max)= 35.81 Ohms
* Q(ms)= 2.961
* Q(es)= 0.785
* Q(ts)= 0.620
* L(e)= 0.35 mH
Coax2:
* f(s)= 59.22 Hz
* R(e)= 7.84 Ohms
* Z(max)= 35.57 Ohms
* Q(ms)= 3.127
* Q(es)= 0.883
* Q(ts)= 0.689
* L(e)= 0.49 mH
Coax3:
* f(s)= 64.60 Hz
* R(e)= 7.63 Ohms
* Z(max)= 31.32 Ohms
* Q(ms)= 2.601
* Q(es)= 0.838
* Q(ts)= 0.634
* L(e)= 0.50 mH
Of course, with an adjustable Lpad, its possible that I didn't have them in the same spot on all three measurements.
* f(s)= 59.22 Hz
* R(e)= 7.50 Ohms
* Z(max)= 35.81 Ohms
* Q(ms)= 2.961
* Q(es)= 0.785
* Q(ts)= 0.620
* L(e)= 0.35 mH
Coax2:
* f(s)= 59.22 Hz
* R(e)= 7.84 Ohms
* Z(max)= 35.57 Ohms
* Q(ms)= 3.127
* Q(es)= 0.883
* Q(ts)= 0.689
* L(e)= 0.49 mH
Coax3:
* f(s)= 64.60 Hz
* R(e)= 7.63 Ohms
* Z(max)= 31.32 Ohms
* Q(ms)= 2.601
* Q(es)= 0.838
* Q(ts)= 0.634
* L(e)= 0.50 mH
Of course, with an adjustable Lpad, its possible that I didn't have them in the same spot on all three measurements.
If anyone has interest, email me and I'll post these on ebay with a buy-it-now option. Ebay and Microsoft are running a 40% cashback promotion with BIN auctions when paid with paypal. Its a really great deal. Today only (Dec 1).
P.S. you have to have a US IP address for this to work.
P.S. you have to have a US IP address for this to work.
I know it's six months after the fact... but are these gone?
2 years, 1 month, 17 days..... to be exact.
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