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Nice subwoofer. Big magnet! :)

If you are unable to find the Thiele/Small parameters online, please look into this: http://www.parts-express.com/pe/showdetl.cfm?partnumber=390-806

I have the older one (Dayton WT3) and it has proven its worth in many instances.

For example, a friend has an 8-year-old Focal 27KX subwoofer that has seen a lot of use (and possibly abuse). He found the T/S parameters online. The box he build didn't sound good at all. Bass was boomy and one-note-ish. No deep rumble.

Then he took it to me for a measure. The WT3 software displayed T/S parameters that were totally different from published specs. Maybe its because the sub had already seen years of use. So he built another box based on the updated T/S parameters.

Sounds very good! Deep, tight, dynamic bass! :)
 

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Directed has some A/D/S information buried on their site, but I don't see this model listed there.

Nor do I see that model listed on Richard So's ([email protected]) site, but he is a former A/D/S employee that runs a service business for A/D/S products (ADS Speaker Repair Service) ...so I'd try asking him~
 

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Discussion Starter · #4 ·
I had the sub tested, and here are the results if anyone else needs them. The test rig required that we hook up the dual voice coils either in series or parallel.

*VOICE COILS WIRED IN SERIES*

MANUFACTURER ads
MODEL SF-104S
DATE 1-6-2013
Fs 34.2503
Fs Added Mass 26.8483
Fs Known Vol 0.0000
Added Mass 50.0000
Known Vol 0.0000
Diameter 200.0000
ZMax 31.6889
ZMax Added Mass 27.1610
ZMax Known Vol 0.0000
Z F1F2 15.2095
Re 7.3000
Rms 5.2160
Qms 3.2880
Qes 0.9841
Qts 0.7574
Cms 0.2709
Mms 79.6941
BL 11.2789
VAS 37.3409
dBSPL 83.8539
L 1kHz 0.1466
L 10kHz 0.0000
CAS 2.674152E-0007
RAS 5284.9410
MAS 80.7470
RAT 22941.6400
SD 0.0314
LCES 34.4682
CMES 626.4612
RES 24.3889
MMD 76.5425
RMT 22.6425
eta 0.1463
Z Min 8.4606
Z AVG 13.4875

*VOICE COILS WIRED IN PARALLEL*

MANUFACTURER ads
MODEL SF-104S
DATE 1-6-2013
Fs 35.1184
Fs Added Mass 28.2909
Fs Known Vol 0.0000
Added Mass 50.0000
Known Vol 0.0000
Diameter 200.0000
ZMax 7.8772
ZMax Added Mass 7.1506
ZMax Known Vol 0.0000
Z F1F2 3.7864
Re 1.8200
Rms 5.8858
Qms 3.4655
Qes 1.0413
Qts 0.8007
Cms 0.2222
Mms 92.4382
BL 5.9709
VAS 30.6209
dBSPL 83.0733
L 1kHz 0.0000
L 10kHz 0.0000
CAS 2.192899E-0007
RAS 5963.5470
MAS 93.6595
RAT 25811.0400
SD 0.0314
LCES 7.9213
CMES 2592.8340
RES 6.0572
MMD 89.2865
RMT 25.4745
eta 0.1223
Z Min 2.1464
Z AVG 3.4106

Here are two plots showing response in a 20-liter sealed box.
 

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Kind of OT but has anyone ever seen these a/d/s subwoofers before? I am an a/d/s/ nut and have never ever heard of this model before let alone seen them anywhere...

Sent from my ADR6425LVW using Tapatalk 2
 
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