Lilmike's Cinema F-20 - Page 52

Hmmm I womder then how much power it could take without excursion or other mechanical problems.

It had been said tht the modest Pe on those drivers was to discourage folks from dumping a gob of power on em simce they reach excursion limits pretty easily.

I believe thermally they are supposed to be good for quite a bit more.

Doesnt sound like worth the extra $ though, maybe a better investment would be build another F20!

Thanks Mike.

Hi, Can I use a Dayton RSS-390 4(15" 4 Ohm)? I have 2 of these and would like to try your design.
Thanks

The RSS-390 has been discussed a few times, perhaps most simply in this post.

Tim

I am using four of these in four F20s and it sounds great. Cheers!

Where did you put all those big cabs? LOL

he has a dinner theater with a screen wall.

I Just put the last coat of duratex on 2 F-20's. I will install the RSS390 HF's and fire them up later tonight.

Is it bad that I haven't even finished these F-20's and I already want to build a pair of LilWreckers?

I didn't think the HO was a 4ohm driver.

I wanted to know if covering the opening with Mellotone Premium Black Speaker Grill Cloth will affect the output? Was planning on covering entire front face of cabinet with it, both opening and front face with a custom cover... so I only have to stain the 5 sides... any ideas or experiences with that plan? I saw some discussion about it, most notably the "chicken wire" which will sadly not fly with the wife.

After watching the video below... thanks for the visual representation of that potential design flaw btw... I will scratch that idea off the list.

I also wanted to feed my speaker output through the back of the cabinet, vice the bottom (assuming its laying down). I was going to route it through the back chamber wall (have a fitting that will be airtight) and run the speaker wire alongside a brace that would terminate with a speakon on the outside wall of the cabinet.

For the access panel, I was going record/scribe the area that "would be cut out" for the access panel and not actually make the cut. If I ever suspect driver failure or any issues... I would then retrofit the access panel to see what’s going on.

Still on the fence about attaching the plate amp to the back of the cabinet (considering a separate enclosure that is screwed into the back of the cabinet in lieu of cutting out a section and making the plate amp exposed to the inside of the cabinet)
Any ideas on this, as I basically don't want to have the amp just sitting on the floor next to the cabinet in its own box. I can’t run speaker wire to remote amp, already have coax in-wall to a drop where sub is going.


Pros:
Only 5 sides need "expensive" stain matching for living room furniture/Klipsch WF-35 (cabernet)
Kids/animals not climbing into speaker.
Easy access to disconnect speaker from amp (will be laying down)
No possibility of leakage from access panel and general aesthetics more than anything.

Cons:
Cloth gets bounced around from air movement to the point of sagging occurring
Will need to be concerned about PL getting on driver when gluing the cover on
driver issues that need to be visually checked by looking into non-existent access panel

Please provide some feedback to either confirm or shoot down my plans in terms of feasibility/performance impacts. Would like to build one and then another depending on how nice the first one comes out. Only have agreement for one right now from the Mrs.

One last thing, so there should be no need to go with bash 500 over the bash 300. I will be using Dayton Audio RSS390HF-4 15".
Edited by stang725 - 2/13/13 at 7:31pm

This video should give you an idea of the volume and velocity of air exiting the mouth of a horn.. That's a 19hz sine wave, on theHouseWrecker 5.1a. Apologies for the wire mess - etc, testing.. Took a couple more short clips after that one - not uploaded. Shredding stuff.
Edited by dB-Kicker - 2/13/13 at 4:11pm

I have been wanting to do a "candle test" on my F20s. The thought is to see if I can blow out a candle with Black Eye Peas 'Boom Boom Pow'. Anyone wanna bet one way or the other? lol

Easily... Mine can ripple pant legs from 5 feet away.

do you know of a airtight fitting to penetrate the back chamber wall that would be able to accept soldered 12g on both sides? Not even sure what to google on that one... will use speakon for external connect.

This is in reference to my above post. If not i can always juat come out the access panel.


Thanks so much for providing previous input for amp info

You would google "bulkhead electrical connector". Here is a link to some mil spec air/liquid connectors

I have 2 of these unknown 15's laying around... F20 worthy?

\* This data was exported from DATS the Dayton Audio Test System
* Piston Diameter = 355.6 mm
* f(s)= 24.22 Hz
* R(e)= 6.62 Ohms
* Z(max)= 62.50 Ohms "I Dont understand this one!"
* Q(ms)= 4.477
* Q(es)= 0.531
* Q(ts)= 0.474
* V(as)= 263.100 liters (9.292 cubic feet)
* L(e)= 1.49 mH
* n(0)= 0.67 %
* SPL= 90.37 1W/1m
* M(ms)= 227.30 grams
* C(ms)= 0.19 mm/N
* BL= 20.77
*
*
Freq Impedance Phase
1.029 6.547 3.145
1.059 6.547 3.145
1.091 6.547 3.145
1.122 6.547 3.145
1.155 6.547 3.145
1.189 6.547 3.145
1.224 6.547 3.145
1.260 6.547 3.145
1.297 6.547 3.145
1.335 6.642 5.945
1.374 6.642 5.945
1.414 6.642 5.945
1.456 6.642 5.945
1.498 6.642 5.945
1.542 6.642 5.945
1.587 6.642 5.945
1.634 6.642 5.945
1.682 6.642 5.945
1.731 6.642 5.945
1.782 6.642 5.945
1.834 6.642 5.945
1.888 6.642 5.945
1.943 6.642 5.945
2.000 6.737 8.734
2.059 6.737 8.734
2.119 6.737 8.734
2.181 6.737 8.734
2.245 6.737 8.734
2.311 6.737 8.734
2.378 6.737 8.734
2.448 6.737 8.734
2.520 6.737 8.734
2.594 6.737 8.734
2.670 6.827 11.430
2.748 6.827 11.430
2.828 6.827 11.430
2.911 6.827 11.430
2.997 6.827 11.430
3.084 6.827 11.430
3.175 6.827 11.430
3.268 6.827 11.430
3.364 6.941 14.095
3.462 6.941 14.095
3.564 6.941 14.095
3.668 6.941 14.095
3.775 6.941 14.095
3.886 6.941 14.095
4.000 7.066 16.728
4.117 7.066 16.728
4.238 7.066 16.728
4.362 7.066 16.728
4.490 7.066 16.728
4.621 7.066 16.728
4.757 7.228 19.321
4.896 7.228 19.321
5.040 7.228 19.321
5.187 7.228 19.321
5.339 7.409 21.881
5.496 7.409 21.881
5.657 7.409 21.881
5.823 7.409 21.881
5.993 7.624 24.344
6.169 7.624 24.344
6.350 7.624 24.344
6.536 7.624 24.344
6.727 7.865 26.694
6.924 7.865 26.694
7.127 7.865 26.694
7.336 8.126 28.988
7.551 8.126 28.988
7.772 8.126 28.988
8.000 8.411 31.125
8.234 8.411 31.125
8.476 8.411 31.125
8.724 8.720 33.274
8.980 8.720 33.274
9.243 8.720 33.274
9.514 9.051 35.353
9.792 9.051 35.353
10.079 9.425 37.419
10.375 9.425 37.419
10.679 9.834 39.474
10.992 9.834 39.474
11.314 10.302 41.430
11.645 10.302 41.430
11.986 10.831 43.413
12.338 10.831 43.413
12.699 11.429 45.284
13.071 11.429 45.284
13.454 12.128 47.088
13.849 12.128 47.088
14.254 12.922 48.803
14.672 13.851 50.329
15.102 13.851 50.329
15.545 14.922 51.714
16.000 16.166 52.858
16.469 16.166 52.858
16.951 17.643 53.758
17.448 19.333 54.360
17.959 21.358 54.549
18.486 21.358 54.549
19.027 23.773 54.399
19.585 28.671 52.821
20.159 31.015 51.605
20.749 35.766 48.976
21.357 41.515 44.804
21.983 48.225 38.671
22.627 55.059 29.832
23.290 60.113 18.637
23.973 62.496 6.011
24.675 61.821 -6.647
25.398 58.267 -17.727
26.143 52.848 -26.089
26.909 47.454 -31.980
27.697 42.990 -36.141
28.509 39.730 -39.577
29.344 36.086 -44.819
30.204 32.371 -49.869
31.089 29.794 -52.481
32.000 26.332 -54.788
32.938 23.434 -55.877
33.903 21.240 -56.039
34.896 19.431 -55.767
35.919 18.011 -55.211
36.971 16.797 -54.438
38.055 15.689 -53.383
39.170 14.601 -52.067
40.317 14.013 -51.171
41.499 13.383 -50.082
42.715 12.616 -48.637
43.967 11.992 -47.096
45.255 11.460 -45.695
46.581 11.015 -44.367
47.946 10.616 -43.164
49.351 10.243 -42.063
50.797 9.914 -41.009
52.285 9.624 -40.038
53.817 9.315 -38.933
55.394 9.050 -37.917
57.018 8.874 -37.144
58.688 8.656 -36.006
60.408 8.508 -35.088
62.178 8.382 -34.169
64.000 8.279 -33.213
65.875 8.172 -32.058
67.806 8.086 -30.824
69.792 8.010 -29.583
71.838 7.942 -28.284
73.943 7.873 -26.984
76.109 7.795 -25.660
78.339 7.696 -24.193
80.635 7.611 -23.068
82.998 7.521 -21.915
85.430 7.439 -20.905
87.933 7.371 -20.008
90.510 7.308 -19.052
93.162 7.262 -18.112
95.892 7.223 -17.075
98.701 7.190 -16.180
101.594 7.155 -15.234
104.571 7.120 -14.279
107.635 7.093 -13.367
110.789 7.070 -12.435
114.035 7.052 -11.640
117.377 7.038 -10.835
120.816 7.023 -9.974
124.356 7.009 -9.051
128.000 7.000 -8.245
131.751 6.993 -7.409
135.611 6.988 -6.466
139.585 6.984 -5.721
143.675 6.981 -4.961
147.885 6.978 -4.212
152.219 6.980 -3.387
156.679 6.984 -2.558
161.270 6.990 -1.817
165.995 6.997 -1.074
170.860 7.006 -0.339
175.866 7.017 0.433
181.019 7.029 1.102
186.324 7.044 1.793
191.783 7.063 2.569
197.403 7.082 3.291
203.187 7.101 3.966
209.141 7.126 4.697
215.269 7.151 5.392
221.577 7.177 6.061
228.070 7.205 6.733
234.753 7.234 7.381
241.632 7.262 8.047
248.712 7.294 8.753
256.000 7.326 9.430
263.501 7.363 10.123
271.223 7.406 10.822
279.170 7.449 11.444
287.350 7.498 12.103
295.770 7.544 12.712
304.437 7.586 13.312
313.358 7.633 13.990
322.540 7.685 14.689
331.991 7.747 15.389
341.719 7.814 16.035
351.732 7.889 16.634
362.039 7.953 17.157
372.647 8.014 17.721
383.567 8.082 18.403
394.806 8.170 19.080
406.375 8.266 19.646
418.282 8.353 20.099
430.539 8.438 20.586
443.155 8.526 21.092
456.140 8.615 21.614
469.506 8.710 22.138
483.264 8.818 22.683
497.424 8.933 23.186
512.000 9.060 23.693
527.003 9.211 24.142
542.445 9.394 24.405
558.340 9.582 24.292
574.701 9.709 23.827
591.541 9.752 23.373
608.874 9.749 23.269
626.715 9.749 23.343
645.080 9.730 23.630
663.982 9.719 24.173
683.438 9.752 24.920
703.464 9.808 25.591
724.077 9.876 26.299
745.294 9.966 27.066
767.133 10.079 27.762
789.612 10.191 28.405
812.749 10.315 29.077
836.565 10.455 29.715
861.078 10.599 30.326
886.309 10.761 30.985
912.280 10.974 31.599
939.012 11.203 31.826
966.527 11.372 31.830
994.849 11.474 31.988
1024.000 11.583 32.512
1054.005 11.748 33.200
1084.890 11.968 33.863
1116.680 12.252 34.376
1149.401 12.583 34.414
1183.081 12.853 33.923
1217.748 12.907 33.390
1253.431 12.957 33.783
1290.159 13.085 34.394
1327.964 13.299 34.807
1366.876 13.444 35.442
1406.929 13.706 36.222
1448.155 14.085 37.165
1490.589 14.608 37.705
1534.266 15.318 37.603
1579.224 16.033 36.101
1625.499 16.316 33.189
1673.129 15.949 31.190
1722.156 15.481 31.845
1772.619 15.669 33.874
1824.561 16.558 34.421
1878.024 17.285 31.699
1933.055 16.979 28.133
1989.697 16.029 27.459
2048.000 15.516 29.647
2108.011 15.705 31.953
2169.780 16.176 32.757
2233.360 16.484 32.394
2298.802 16.510 32.047
2366.162 16.448 32.377
2435.496 16.458 33.227
2506.862 16.594 34.315
2580.318 16.860 35.376
2655.927 17.222 36.271
2733.752 17.659 36.977
2813.857 18.192 37.477
2896.309 18.858 37.605
2981.178 19.649 36.842
3068.533 20.198 34.611
3158.448 20.002 32.167
3250.997 19.333 31.474
3346.259 18.897 32.633
3444.312 18.907 34.152
3545.238 19.155 35.355
3649.121 19.496 36.159
3756.049 19.854 36.713
3866.109 20.244 37.108
3979.395 20.636 37.200
4096.000 20.919 37.157
4216.022 21.123 37.293
4339.561 21.369 37.689
4466.720 21.689 38.092
4597.605 22.051 38.405
4732.325 22.420 38.641
4870.992 22.796 38.871
5013.723 23.195 39.055
5160.637 23.596 39.191
5311.855 24.011 39.338
5467.504 24.481 39.450
5627.714 24.971 39.417
5792.619 25.463 39.230
5962.355 25.896 38.871
6137.066 26.192 38.460
6316.896 26.381 38.360
6501.995 26.640 38.612
6692.518 27.064 38.889
6888.623 27.551 39.005
7090.476 28.072 39.018
7298.242 28.641 38.895
7512.097 29.216 38.543
7732.218 29.716 37.927
7958.790 30.071 37.195
8192.000 30.158 36.433
8432.044 30.070 36.238
8679.122 30.066 36.610
8933.439 30.345 37.128
9195.209 30.721 37.478
9464.649 31.153 37.766
9741.985 31.654 37.981
10027.447 32.206 38.022
10321.273 32.715 37.891
10623.710 33.146 37.721
10935.008 33.536 37.622
11255.428 33.940 37.575
11585.238 34.353 37.508
11924.711 34.751 37.438
12274.132 35.129 37.394
12633.791 35.514 37.389
13003.989 35.899 37.402
13385.035 36.296 37.452
13777.247 36.722 37.524
14180.951 37.185 37.588
14596.485 37.661 37.622
15024.194 38.143 37.634
15464.437 38.625 37.630
15917.579 39.112 37.623
16384.000 39.602 37.611
16864.088 40.092 37.595
17358.243 40.581 37.573
17866.879 41.070 37.549
18390.418 41.562 37.526
18929.299 42.054 37.502
19483.969 42.492 37.449
20054.893 42.582 37.106
20642.546 41.371 35.125

How would I check? They arent a cheap looking sub...

I got them for free so if I fry one it is not a loss... I have the RSS 390 HF 15 also...
Thanks.
BTW. With the unknown sub
WinSpeaker calls for a 85cuft box with a Q of .5 But only a 5.12 with a Q of .707 Strange.... Maybe DATS is off with the TS numbers?

Thanks, The cone is paper and the surround is fairly thin rubber so I think it is just a odd ball sub. The magnet structure is made of 8 2.25" magnets side by side in a circle sandwitched between 2 steel plates.
I just put one in a 4.5cuft sealed box I have with 550 watts and the bass is not very impressive...

Sorry for getting off topic.

take a pic and post it in here, chances are we can identify it.

Their ar six magnets not eight. The only markings are 5501705, 8 ohm, made in Taiwan...
https://dl.dropbox.com/u/42617308/Speaker/speaker1.JPG
https://dl.dropbox.com/u/42617308/Speaker/speaker2.JPG
https://dl.dropbox.com/u/42617308/Speaker/speakers3.JPG

Thanks for the help.

might be ok, might not. Maybe just build 1 and throw the sub in and see how it sounds. If it doesnt work order the right driver.

the sub doesn't look terribly impressive but neither does the mfw15. I'm sure mike will chime in on it when he sees the pics.
Edited by stormwind13 - 2/20/13 at 2:53pm