1 00:00:00,040 --> 00:00:04,759 Hello world! In this video I will 2 00:00:02,440 --> 00:00:07,839 modify this subwoofer. So that's it 3 00:00:04,759 --> 00:00:13,000 by a KF subwoofer. 4 00:00:07,839 --> 00:00:15,719 So it is a CF I T 100. It is produced in 5 00:00:13,000 --> 00:00:19,760 China, you can see. You too forget 6 00:00:15,719 --> 00:00:22,039 here what consumption is reported. About 500W. 7 00:00:19,760 --> 00:00:25,519 So this subwoofer comes from a 8 00:00:22,039 --> 00:00:28,160 2.1 system, but I don't have the satellites either 9 00:00:25,519 --> 00:00:30,560 nor the command part. So the part of 10 00:00:28,160 --> 00:00:33,600 command connects here and 11 00:00:30,560 --> 00:00:37,600 speakers here. Here it has an exit 12 00:00:33,600 --> 00:00:40,719 for some receiver, I don't know exactly what. 13 00:00:37,600 --> 00:00:43,360 It has the fan for cooling. Here he has 14 00:00:40,719 --> 00:00:45,800 the bass speaker, so it's a 15 00:00:43,360 --> 00:00:47,719 closed premises. I have this subwoofer 16 00:00:45,800 --> 00:00:51,000 bought at the flea market at 17 00:00:47,719 --> 00:00:53,160 the price of 70 RON negotiated. The modification 18 00:00:51,000 --> 00:00:55,160 what I'm going to do now, I'm going to 19 00:00:53,160 --> 00:00:57,079 I try to keep it as original as possible and 20 00:00:55,160 --> 00:00:59,719 to modify only this part of the order 21 00:00:57,079 --> 00:01:01,960 and I'm going to put a volume button on it 22 00:00:59,719 --> 00:01:03,960 turned on. It will boot normally from 23 00:01:01,960 --> 00:01:07,119 this button, only he won't have it anymore 24 00:01:03,960 --> 00:01:09,600 standby function. Sound input o 25 00:01:07,119 --> 00:01:11,960 let it be these two times. 26 00:01:09,600 --> 00:01:13,880 This subwoofer weighs around 20 27 00:01:11,960 --> 00:01:16,280 per kg, in my opinion. So it is 28 00:01:13,880 --> 00:01:18,640 very hard. It also has a transformer 29 00:01:16,280 --> 00:01:22,000 and the large speaker. 30 00:01:18,640 --> 00:01:25,640 So that's about it. Now, the first time I'm going to 31 00:01:22,000 --> 00:01:28,840 open here at the speaker to 32 00:01:25,640 --> 00:01:30,560 to show you what's there. 33 00:01:28,840 --> 00:01:32,840 So now I'm going to unpack this part from 34 00:01:30,560 --> 00:01:34,520 speaker so you can see what it's like 35 00:01:32,840 --> 00:01:37,560 this speaker here. That I don't know either 36 00:01:34,520 --> 00:01:41,439 how is this speaker, but I'm curious to 37 00:01:37,560 --> 00:01:41,439 I can see how big it is. 38 00:02:00,799 --> 00:02:06,840 It seems that this protective screen was 39 00:02:02,920 --> 00:02:11,440 glued with raw silicone mastic. That's right 40 00:02:06,840 --> 00:02:11,440 bent a little here, but it has nothing. 41 00:02:15,640 --> 00:02:20,840 This speaker is 25 cm. 42 00:02:58,480 --> 00:03:02,760 These wires are very short. 43 00:03:07,840 --> 00:03:13,599 And now I opened it. 44 00:03:10,959 --> 00:03:17,120 That's what it looks like. 45 00:03:13,599 --> 00:03:17,120 Forget the terminals. 46 00:03:17,200 --> 00:03:21,440 I hope you can see the coil too. 47 00:03:39,159 --> 00:03:44,599 The box is soundproofed inside with this 48 00:03:41,599 --> 00:03:47,439 sponge 49 00:03:44,599 --> 00:03:49,680 The sub-offer is made of MDF, 50 00:03:47,439 --> 00:03:52,040 it can be seen. 51 00:03:49,680 --> 00:03:54,599 The wires lead directly to the control board, 52 00:03:52,040 --> 00:03:59,200 so it no longer has any kind of filter. 53 00:03:54,599 --> 00:03:59,200 Now I'm going to open the control module. 54 00:04:18,560 --> 00:04:21,720 That's who we are. 55 00:04:33,199 --> 00:04:39,160 In the end, I removed those coils 56 00:04:35,080 --> 00:04:41,919 confused. So the power part like that. 57 00:04:39,160 --> 00:04:44,400 As you can see it has integrated circuits 58 00:04:41,919 --> 00:04:46,479 on the amplification side. 59 00:04:44,400 --> 00:04:48,400 I don't know what kind of integrated circuits it has 60 00:04:46,479 --> 00:04:51,840 here, but I'm going to open it up and show you 61 00:04:48,400 --> 00:04:54,120 and you Here is the command part in 62 00:04:51,840 --> 00:04:57,120 face. Likewise here the part of 63 00:04:54,120 --> 00:04:57,120 preamplification. 64 00:05:00,080 --> 00:05:07,039 Here the fan has this part. 65 00:05:04,240 --> 00:05:10,199 Here is the standby board and inside it 66 00:05:07,039 --> 00:05:13,240 can see the box that it has reinforcement from 67 00:05:10,199 --> 00:05:17,880 this to the screws and forget what toroidal 68 00:05:13,240 --> 00:05:19,800 has there So it's very big. Until 69 00:05:17,880 --> 00:05:22,520 finally I took the transformer out 70 00:05:19,800 --> 00:05:25,880 so that I can work more easily. Anyway 71 00:05:22,520 --> 00:05:29,479 this transformer is quite large 72 00:05:25,880 --> 00:05:34,520 compared to an SSD from this one. Forget it. 73 00:05:29,479 --> 00:05:34,520 So that's kind of how it would come 74 00:05:35,919 --> 00:05:42,800 and its thickness. 75 00:05:38,479 --> 00:05:46,080 Look how thick it is. 76 00:05:42,800 --> 00:05:46,080 Kind of like that. 77 00:05:47,240 --> 00:05:51,960 So now I noticed it here 78 00:05:49,560 --> 00:05:54,039 the thing is that it overheated here, but 79 00:05:51,960 --> 00:05:57,280 I don't know what caused it 80 00:05:54,039 --> 00:05:59,400 this. Only this part of the supply m 81 00:05:57,280 --> 00:06:02,160 I forgot so to see where it goes and leads 82 00:05:59,400 --> 00:06:05,319 directly to this control board, then 83 00:06:02,160 --> 00:06:09,240 who takes the order. Look how many circuits 84 00:06:05,319 --> 00:06:09,240 integrated has on there. 85 00:06:10,240 --> 00:06:16,000 I'll feed it and check to see 86 00:06:12,759 --> 00:06:18,400 if there is any short circuit and if i 87 00:06:16,000 --> 00:06:20,479 the tension reaches all the right places. And 88 00:06:18,400 --> 00:06:22,400 now I have to plug it in. 89 00:06:20,479 --> 00:06:25,800 In the end I identified the pin of 90 00:06:22,400 --> 00:06:28,800 standby. So that would mean resistance 91 00:06:25,800 --> 00:06:30,880 this stuck on these two pins. So. So 92 00:06:28,800 --> 00:06:32,960 I identified him as follows. I have 93 00:06:30,880 --> 00:06:35,080 turned on the measuring device, I turned it on 94 00:06:32,960 --> 00:06:37,759 direct current mode and I measured with o 95 00:06:35,080 --> 00:06:41,120 table key and with the plus key on the pins 96 00:06:37,759 --> 00:06:43,919 these from here. So I found plus 12 97 00:06:41,120 --> 00:06:47,280 V on this border pine. Then I have 98 00:06:43,919 --> 00:06:49,960 I took this bulb from here and put it on 99 00:06:47,280 --> 00:06:51,880 given. I put it at plus 12 at this pin 100 00:06:49,960 --> 00:06:54,720 the last one here because it leads somewhere in 101 00:06:51,880 --> 00:06:56,599 relay circuit. He has the pin again 102 00:06:54,720 --> 00:07:00,360 this one here that leads everything in the circuit 103 00:06:56,599 --> 00:07:04,039 with relay. So the moment I have it 104 00:07:00,360 --> 00:07:06,160 put there, my light bulb went on. So this 105 00:07:04,039 --> 00:07:08,240 means that 106 00:07:06,160 --> 00:07:10,000 this pin does the standby part, only 107 00:07:08,240 --> 00:07:13,840 that he must stay logged in 108 00:07:10,000 --> 00:07:16,400 permanence to keep evil activated. 109 00:07:13,840 --> 00:07:20,639 Kind of like that. So now 110 00:07:16,400 --> 00:07:22,879 I will start it from the button below. 111 00:07:20,639 --> 00:07:27,080 Now I turn it on. S spun around 112 00:07:22,879 --> 00:07:27,080 the fan a little. So. 113 00:07:27,800 --> 00:07:34,400 Now I have set the device to power 114 00:07:29,759 --> 00:07:37,039 alternatively and I will measure here. 115 00:07:34,400 --> 00:07:40,879 Look at the tension it shows me. 116 00:07:37,039 --> 00:07:44,319 14 V alternating current. 117 00:07:40,879 --> 00:07:46,960 Here on the power supply 118 00:07:44,319 --> 00:07:50,000 floors for satellites. 119 00:07:46,960 --> 00:07:51,919 I'll put in a little. Look, it shows me 24 120 00:07:50,000 --> 00:07:54,520 V in alternating current. So that would 121 00:07:51,919 --> 00:07:57,479 come on satellites normally and on 122 00:07:54,520 --> 00:08:00,960 subwoofer bass part, 123 00:07:57,479 --> 00:08:00,960 to say so. 124 00:08:07,680 --> 00:08:12,919 Yes, it's less. It is 20 V current 125 00:08:10,240 --> 00:08:15,919 alternatively 126 00:08:12,919 --> 00:08:15,919 So. 127 00:08:16,759 --> 00:08:21,639 And these are the power tensions, like 128 00:08:19,680 --> 00:08:24,240 to say so. So it has higher voltage 129 00:08:21,639 --> 00:08:27,000 on satellite and straight. Otherwise, very 130 00:08:24,240 --> 00:08:29,400 many tensions start from here on 131 00:08:27,000 --> 00:08:31,039 this board In the end I detected on 132 00:08:29,400 --> 00:08:33,800 which wire the signal enters. So come on 133 00:08:31,039 --> 00:08:36,000 these two threads. So it has a table too 134 00:08:33,800 --> 00:08:39,479 this red thread. 135 00:08:36,000 --> 00:08:41,320 So. I also detected the standby pin on 136 00:08:39,479 --> 00:08:43,680 the final floors. Look here. So I have 137 00:08:41,320 --> 00:08:48,040 taken 12 V from this transistor and l 138 00:08:43,680 --> 00:08:50,440 I connected here in this jack. Plug this 139 00:08:48,040 --> 00:08:53,040 it led directly to the plate and somehow 140 00:08:50,440 --> 00:08:56,200 the first command from here to turn on 141 00:08:53,040 --> 00:08:58,160 speakers. So I made it this way 142 00:08:56,200 --> 00:09:00,200 directly. 143 00:08:58,160 --> 00:09:02,399 I connected the speaker to the board, I have it 144 00:09:00,200 --> 00:09:05,240 connected only on the subwoofer side. 145 00:09:02,399 --> 00:09:08,240 Check it out here how I connected it. 146 00:09:05,240 --> 00:09:08,240 So. 147 00:09:13,240 --> 00:09:18,360 In the end I unwrapped this part of 148 00:09:15,040 --> 00:09:23,360 preamplification. So it can be seen. 149 00:09:18,360 --> 00:09:23,360 Here it has output for five speakers. 150 00:09:23,519 --> 00:09:28,240 Here it has this stabilizing part. 151 00:09:28,399 --> 00:09:35,959 So. So it has many capacitors. 152 00:09:32,360 --> 00:09:37,920 Here is the preamp board 153 00:09:35,959 --> 00:09:40,160 for satellites, so to speak. So 154 00:09:37,920 --> 00:09:43,560 these three integrals correct 155 00:09:40,160 --> 00:09:47,480 sound on satellites and base, 156 00:09:43,560 --> 00:09:49,120 but on the base side less. So 157 00:09:47,480 --> 00:09:53,000 these integrateds, as it were, have 158 00:09:49,120 --> 00:09:55,600 those rock, pop, jazz presets. About 159 00:09:53,000 --> 00:09:58,680 that controls them and they are controlled 160 00:09:55,600 --> 00:10:00,800 by digital signal. As well as this one 161 00:09:58,680 --> 00:10:02,839 down here. So. So all of them 162 00:10:00,800 --> 00:10:08,160 these little operatives here, dude 163 00:10:02,839 --> 00:10:08,160 SMD, they are some TL 072C. 164 00:10:09,000 --> 00:10:12,440 It can be seen 165 00:10:14,680 --> 00:10:20,959 here. He still has some 166 00:10:17,680 --> 00:10:23,839 these digital controllers. 167 00:10:20,959 --> 00:10:26,600 I suspect that these are set to give 168 00:10:23,839 --> 00:10:31,959 the signal to the table, as it were. I mean yes 169 00:10:26,600 --> 00:10:31,959 make that mute on the speakers. 170 00:10:34,680 --> 00:10:40,600 Here this output multirom. So it comes 171 00:10:37,959 --> 00:10:43,760 connected to the other board. 172 00:10:40,600 --> 00:10:46,519 So. The exit is on this side of 173 00:10:43,760 --> 00:10:48,760 there, so it comes through three operational 174 00:10:46,519 --> 00:10:51,920 and it has this entrance from here, but it is 175 00:10:48,760 --> 00:10:53,920 totally separate from the rest of the board. 176 00:10:51,920 --> 00:10:56,360 Here on the board it has this port of 177 00:10:53,920 --> 00:10:59,760 communication. It can be seen that here it has 178 00:10:56,360 --> 00:11:02,760 only the 15V supply and input and 179 00:10:59,760 --> 00:11:08,360 output on only one channel. 180 00:11:02,760 --> 00:11:08,360 All operational are BA4560 181 00:11:08,480 --> 00:11:14,079 and 182 00:11:10,160 --> 00:11:17,079 This JRC here seems to be one 183 00:11:14,079 --> 00:11:17,079 TL062. 184 00:11:21,880 --> 00:11:27,800 So these are the parts that can be used 185 00:11:24,800 --> 00:11:27,800 see 186 00:11:35,600 --> 00:11:41,360 Here I see that it says that it is from 2003, something from 187 00:11:38,360 --> 00:11:41,360 the gender. 188 00:11:44,959 --> 00:11:49,959 So that's about it, so to speak. 189 00:11:48,399 --> 00:11:53,279 In the end I connected the module 190 00:11:49,959 --> 00:11:57,120 gain on the oscilloscope, so I put 191 00:11:53,279 --> 00:11:59,480 this resistance of 4 in parallel to you 192 00:11:57,120 --> 00:12:01,480 I'll show you how powerful it is. So, I have 193 00:11:59,480 --> 00:12:04,279 connected and direct signal generator 194 00:12:01,480 --> 00:12:06,760 on the entrance of the final floor. So 195 00:12:04,279 --> 00:12:10,519 amplification on the subwoofer is only on 196 00:12:06,760 --> 00:12:14,199 a single integrated of this. So. 197 00:12:10,519 --> 00:12:17,600 Now I'm going to let him go. 198 00:12:14,199 --> 00:12:21,000 So they appeared. 199 00:12:17,600 --> 00:12:23,040 Now I'm going to raise the current. 200 00:12:21,000 --> 00:12:28,440 What did I pick up? 201 00:12:23,040 --> 00:12:28,440 So it ends up like this. Let me give this one away. 202 00:12:33,240 --> 00:12:38,519 So it seems that 203 00:12:35,600 --> 00:12:42,399 go up stream. 204 00:12:38,519 --> 00:12:44,360 So about this and about that is the power, yes 205 00:12:42,399 --> 00:12:46,800 I say so. 206 00:12:44,360 --> 00:12:50,199 Now I'm going to take it back down because no 207 00:12:46,800 --> 00:12:51,920 I can leave too much time. 208 00:12:50,199 --> 00:12:54,760 I don't leave it any longer because until 209 00:12:51,920 --> 00:12:58,000 trace is an integrated and the integrals 210 00:12:54,760 --> 00:13:01,079 these are unpredictable. Anyway, now 211 00:12:58,000 --> 00:13:04,320 I'm going to square off and take a test 212 00:13:01,079 --> 00:13:04,320 per square. 213 00:13:04,760 --> 00:13:11,920 Here you can also see the time rise, 214 00:13:08,120 --> 00:13:15,600 that is, the time response. It can be seen that it is 215 00:13:11,920 --> 00:13:19,360 about, so to speak, of 6. To pick up 216 00:13:15,600 --> 00:13:19,360 the tension all. 217 00:13:21,480 --> 00:13:27,000 It is not a very time response 218 00:13:23,800 --> 00:13:30,519 excellent, so to speak. So anyway 219 00:13:27,000 --> 00:13:32,680 something, let's say, average, that is, not something 220 00:13:30,519 --> 00:13:33,959 who knows what, but good for him anyway. I have 221 00:13:32,680 --> 00:13:36,519 connected and this card of 222 00:13:33,959 --> 00:13:38,240 preamp, only it is canceled out of 223 00:13:36,519 --> 00:13:40,639 because when I enter 224 00:13:38,240 --> 00:13:44,480 signal with the generator in this board, 225 00:13:40,639 --> 00:13:48,680 this board starts producing harmonics 226 00:13:44,480 --> 00:13:52,199 and so i skipped and canceled. now i have 227 00:13:48,680 --> 00:13:54,160 to undo this sheet metal clamp. 228 00:13:52,199 --> 00:14:00,519 In the end I also undid this clamp 229 00:13:54,160 --> 00:14:03,000 tin. The integrated is a TDA 7293. 230 00:14:00,519 --> 00:14:05,040 I connected the input from the computer. 231 00:14:03,000 --> 00:14:08,240 So. So I connected it to the unit here 232 00:14:05,040 --> 00:14:10,399 in the back. So. So I connected and 233 00:14:08,240 --> 00:14:13,360 this bass filter. It's kind of 234 00:14:10,399 --> 00:14:15,279 crossover, so to speak, because it gives 235 00:14:13,360 --> 00:14:18,480 only the bass. So now let me go 236 00:14:15,279 --> 00:14:18,480 to the play. 237 00:14:19,000 --> 00:14:26,199 Here's the subwoofer. 238 00:14:22,040 --> 00:14:26,199 I'm going to turn up the volume. OK. 239 00:14:42,950 --> 00:14:44,970 >> [music] 240 00:14:50,155 --> 00:14:52,175 [music] 241 00:14:55,395 --> 00:14:57,415 [music] 242 00:15:01,945 --> 00:15:03,965 [music] 243 00:15:07,185 --> 00:15:09,205 [music] 244 00:15:10,360 --> 00:15:16,480 >> And that's pretty much the sound test, so to speak 245 00:15:12,560 --> 00:15:18,360 I say so. So this crossover board 246 00:15:16,480 --> 00:15:20,240 works with this input. 247 00:15:18,360 --> 00:15:24,000 So all you need is a button 248 00:15:20,240 --> 00:15:25,519 mounted volume here, like that. Or if not, I would 249 00:15:24,000 --> 00:15:27,959 I could not mount any more buttons 250 00:15:25,519 --> 00:15:30,639 volume, because if to use 251 00:15:27,959 --> 00:15:33,160 together with a receiver from this 5.1, 252 00:15:30,639 --> 00:15:36,639 then there will be no need. 253 00:15:33,160 --> 00:15:39,120 So. Here he has this exit on several 254 00:15:36,639 --> 00:15:40,880 channels. 255 00:15:39,120 --> 00:15:43,360 These types of integrated are possible 256 00:15:40,880 --> 00:15:44,959 also use in the deck, only he is made 257 00:15:43,360 --> 00:15:47,199 only on a single integrated, but not this 258 00:15:44,959 --> 00:15:50,160 and a problem, it can be modified. Anyway 259 00:15:47,199 --> 00:15:52,279 I would like to modify it and switch to something 260 00:15:50,160 --> 00:15:55,800 on transistors. 261 00:15:52,279 --> 00:15:58,040 To put a module on the transistor and 262 00:15:55,800 --> 00:15:59,199 all the same to remain on the transformer 263 00:15:58,040 --> 00:16:03,759 this one. Or if not, to put one on him 264 00:15:59,199 --> 00:16:06,240 transformer with higher voltages. 265 00:16:03,759 --> 00:16:08,319 So. This crossover is good as it is 266 00:16:06,240 --> 00:16:10,720 he So finally this crossover 267 00:16:08,319 --> 00:16:13,199 matters most. Here I have 268 00:16:10,720 --> 00:16:16,079 amplifier from the Teofel subwoofer. 269 00:16:13,199 --> 00:16:18,720 So I have a video posted about that 270 00:16:16,079 --> 00:16:21,880 a few months ago, like that. So 271 00:16:18,720 --> 00:16:25,319 it is a strong amplification. 272 00:16:21,880 --> 00:16:27,959 It is made with a module in the class of 273 00:16:25,319 --> 00:16:30,279 with switched source. So it is possible 274 00:16:27,959 --> 00:16:33,600 see here 275 00:16:30,279 --> 00:16:36,120 So. Here he has the crossover. So. So 276 00:16:33,600 --> 00:16:38,399 this crossover consists of 277 00:16:36,120 --> 00:16:40,000 the operational ones 278 00:16:38,399 --> 00:16:43,040 4560 279 00:16:40,000 --> 00:16:45,880 and 4558. 280 00:16:43,040 --> 00:16:48,279 A little thinner, but no problem. I would 281 00:16:45,880 --> 00:16:49,880 I could put those operatives on him 282 00:16:48,279 --> 00:16:52,079 TL072. 283 00:16:49,880 --> 00:16:55,360 So that's what it looks like. That's about it 284 00:16:52,079 --> 00:16:58,079 his radiator. Look at the radiator. 285 00:16:55,360 --> 00:17:00,920 Very thin. 286 00:16:58,079 --> 00:17:03,360 Now I'm going to put it on the oscilloscope and I'm going to 287 00:17:00,920 --> 00:17:06,280 I show you his performance so you can do so 288 00:17:03,360 --> 00:17:08,319 a comparison. Now I have connected the module 289 00:17:06,280 --> 00:17:11,160 this to the oscilloscope and the generator 290 00:17:08,319 --> 00:17:15,280 signal. It can be seen with what frequency 291 00:17:11,160 --> 00:17:19,559 he works So 84kHz. That's it 292 00:17:15,280 --> 00:17:22,559 the working frequency of this class of 293 00:17:19,559 --> 00:17:22,559 Like that. 294 00:17:25,480 --> 00:17:32,200 Now I have set the generator and I am going to i 295 00:17:28,919 --> 00:17:32,200 i start 296 00:17:32,360 --> 00:17:36,400 I'm going to give him the solidarity piss. 297 00:17:43,640 --> 00:17:47,600 Now I'm going to pick up the signal. 298 00:18:08,159 --> 00:18:14,960 So that's about the maximum. So it is possible 299 00:18:10,799 --> 00:18:17,840 see 25 near 26 of V. I stopped it from 300 00:18:14,960 --> 00:18:20,840 because it is heard from this resistance. 301 00:18:17,840 --> 00:18:20,840 So. 302 00:18:21,280 --> 00:18:26,840 He like that. The radiator is cold. 303 00:18:24,720 --> 00:18:29,039 It didn't warm up at all. Now I have to 304 00:18:26,840 --> 00:18:30,880 I connect the module to the bass speaker and 305 00:18:29,039 --> 00:18:33,960 I'm going to play the same song I did 306 00:18:30,880 --> 00:18:36,760 o and before to show how it is 307 00:18:33,960 --> 00:18:39,640 manage 308 00:18:36,760 --> 00:18:41,880 Now I have connected the subwoofer. So, I have it 309 00:18:39,640 --> 00:18:45,799 connected to this subwoofer here and 310 00:18:41,880 --> 00:18:45,799 I'm going to put the same piece. 311 00:18:46,080 --> 00:18:51,400 Now they are also hearing media in another doctor that 312 00:18:48,679 --> 00:18:53,559 the crossover is not working properly. 313 00:18:51,400 --> 00:18:55,120 Here I unclipped to 314 00:18:53,559 --> 00:18:58,440 final transistors and forget what 315 00:18:55,120 --> 00:19:01,600 final transistors has here. 316 00:18:58,440 --> 00:19:03,840 So it's IRRF 640N, 317 00:19:01,600 --> 00:19:06,120 two pieces, so to speak. So not here 318 00:19:03,840 --> 00:19:08,240 is it still with complementary or else I know 319 00:19:06,120 --> 00:19:11,280 what other things. So it's two mosfets at 320 00:19:08,240 --> 00:19:14,159 sort of, so to speak. Here the manufacturer a 321 00:19:11,280 --> 00:19:16,840 left room for upgrade. He can see that 322 00:19:14,159 --> 00:19:19,200 there is room for two more on the board 323 00:19:16,840 --> 00:19:21,960 transistors from these and it can be drawn 324 00:19:19,200 --> 00:19:23,760 more power from this source. Anyway, 325 00:19:21,960 --> 00:19:26,159 yes, this module also has 326 00:19:23,760 --> 00:19:28,520 this power function. So if you put it on 327 00:19:26,159 --> 00:19:30,320 automatic mode, when no more 328 00:19:28,520 --> 00:19:32,720 receives signal the subwoofer goes into 329 00:19:30,320 --> 00:19:35,960 standby alone, without going to him anymore, 330 00:19:32,720 --> 00:19:38,360 what the other does not have this thing. 331 00:19:35,960 --> 00:19:40,960 At least not on him. It may have on 332 00:19:38,360 --> 00:19:43,679 remote, but I don't know for sure if he had 333 00:19:40,960 --> 00:19:46,360 but this one has. I finally finished 334 00:19:43,679 --> 00:19:48,880 and this modification. So, as it is 335 00:19:46,360 --> 00:19:51,760 can see, I mounted this module of 336 00:19:48,880 --> 00:19:53,440 source and amplifier directly on the board 337 00:19:51,760 --> 00:19:56,200 this, no radiator, no nothing, 338 00:19:53,440 --> 00:19:58,640 because it does not heat up. So. Here 339 00:19:56,200 --> 00:20:00,480 is the 220 supply side. I have them 340 00:19:58,640 --> 00:20:04,440 caught like that in two of these bolts 341 00:20:00,480 --> 00:20:04,440 because I had no other choice. 342 00:20:04,559 --> 00:20:10,320 I used this crossover board here, 343 00:20:08,159 --> 00:20:14,679 see, I got her in these screws 344 00:20:10,320 --> 00:20:18,919 and rigid enough. Anyway, 345 00:20:14,679 --> 00:20:20,960 here is the input, volume knob and 346 00:20:18,919 --> 00:20:24,240 his original plate. I preferred it 347 00:20:20,960 --> 00:20:26,760 I keep it because it has that function of his 348 00:20:24,240 --> 00:20:29,080 of auto shutdown when no more 349 00:20:26,760 --> 00:20:31,200 it receives signal which is very useful 350 00:20:29,080 --> 00:20:33,000 and when I stop typing 351 00:20:31,200 --> 00:20:35,840 signal in the subwoofer it goes into 352 00:20:33,000 --> 00:20:38,159 rest alone. 353 00:20:35,840 --> 00:20:40,559 I canceled a buffer from this and I have 354 00:20:38,159 --> 00:20:42,440 connected instead with this module 355 00:20:40,559 --> 00:20:44,520 crossover type. He still has one here 356 00:20:42,440 --> 00:20:47,960 crossover, only you've heard it too, no 357 00:20:44,520 --> 00:20:49,960 it sounds good enough. 358 00:20:47,960 --> 00:20:53,600 I changed all these integrateds 359 00:20:49,960 --> 00:20:55,480 operational and I put TL072. 360 00:20:53,600 --> 00:20:58,559 So this is the first integrated 361 00:20:55,480 --> 00:21:01,159 operational in which the signal enters. Of 362 00:20:58,559 --> 00:21:02,880 here they go further towards the crossover 363 00:21:01,159 --> 00:21:05,440 which I mounted now and from here 364 00:21:02,880 --> 00:21:09,640 it goes further into another buffer and on 365 00:21:05,440 --> 00:21:11,360 these two tracks do the bass correction. 366 00:21:09,640 --> 00:21:14,200 So. 367 00:21:11,360 --> 00:21:17,480 This integrated here does 368 00:21:14,200 --> 00:21:22,520 that auto shutdown function. 369 00:21:17,480 --> 00:21:25,960 It consists of an operational 4560. 370 00:21:22,520 --> 00:21:29,720 It still has some transistors here. So. 371 00:21:25,960 --> 00:21:31,360 I made a clamping system here. 372 00:21:29,720 --> 00:21:33,360 So. 373 00:21:31,360 --> 00:21:35,720 Forget that light bulb. The bulb will stay on 374 00:21:33,360 --> 00:21:38,600 there. So is that button over there 375 00:21:35,720 --> 00:21:40,120 to stay 376 00:21:38,600 --> 00:21:42,679 Feeding. I took it straight from the 377 00:21:40,120 --> 00:21:47,320 plate. From here I looked for those plus minuses 378 00:21:42,679 --> 00:21:50,320 15 V and brought directly to this board. 379 00:21:47,320 --> 00:21:53,120 Here this setting remained the same 380 00:21:50,320 --> 00:21:55,240 factory set. The bottom operatives 381 00:21:53,120 --> 00:21:57,240 I took them out because anyway 382 00:21:55,240 --> 00:22:01,080 were put I didn't use it for nothing 383 00:21:57,240 --> 00:22:04,200 this function below. From there 384 00:22:01,080 --> 00:22:07,520 forget the two switch transistors 385 00:22:04,200 --> 00:22:10,760 these transistors here. 386 00:22:07,520 --> 00:22:10,760 Transistors are 387 00:22:11,120 --> 00:22:14,880 IRF 388 00:22:12,640 --> 00:22:18,159 740, 389 00:22:14,880 --> 00:22:20,440 so with the volume button set to minimum no 390 00:22:18,159 --> 00:22:23,000 it has no background noise whatsoever. I have 391 00:22:20,440 --> 00:22:27,520 checked this thing. So, at the moment 392 00:22:23,000 --> 00:22:29,760 when I turn the volume to maximum, so to speak, 393 00:22:27,520 --> 00:22:32,279 a kind of noise is heard. Now it is 394 00:22:29,760 --> 00:22:34,480 connected to the computer via this cable 395 00:22:32,279 --> 00:22:37,600 Jack at RCA. 396 00:22:34,480 --> 00:22:40,159 So, it's a cheaper cable than this one. 397 00:22:37,600 --> 00:22:42,360 The power button remained the same. 398 00:22:40,159 --> 00:22:44,279 Look, this is what the changes look like on 399 00:22:42,360 --> 00:22:47,120 Verso. 400 00:22:44,279 --> 00:22:50,320 I removed the fan. Not anymore anyway 401 00:22:47,120 --> 00:22:52,640 he is needed. Here are all the pieces 402 00:22:50,320 --> 00:22:55,960 that I have left after this repair. 403 00:22:52,640 --> 00:22:58,520 So these pieces, so to speak, if 404 00:22:55,960 --> 00:23:00,360 would be to make an amplifier n ar 405 00:22:58,520 --> 00:23:03,279 that amp would have, shall we say, 406 00:23:00,360 --> 00:23:05,760 about 50 W per channel. 407 00:23:03,279 --> 00:23:08,200 These are some classic components. 408 00:23:05,760 --> 00:23:10,559 Now types are not really used anymore 409 00:23:08,200 --> 00:23:13,200 these components. All devices have 410 00:23:10,559 --> 00:23:17,880 passed on switching sources. In class 411 00:23:13,200 --> 00:23:20,120 D. they don't really use class AB anymore and 412 00:23:17,880 --> 00:23:22,240 that's about it. 413 00:23:20,120 --> 00:23:24,440 I will be back with more videos. 414 00:23:22,240 --> 00:23:27,159 So, I will post again 415 00:23:24,440 --> 00:23:29,480 two videos about these two 416 00:23:27,159 --> 00:23:32,880 amps like that, which I got 417 00:23:29,480 --> 00:23:35,440 also from the fair. Yes, I gave this one more 418 00:23:32,880 --> 00:23:37,840 a little, because no, what does he look like and this one I have 419 00:23:35,440 --> 00:23:39,679 given more I'm going to do a shoot with 420 00:23:37,840 --> 00:23:41,559 this car station. I still don't know if 421 00:23:39,679 --> 00:23:44,559 works, but I'm going to come up with one anyway 422 00:23:41,559 --> 00:23:46,720 special video for this station. 423 00:23:44,559 --> 00:23:48,679 I also have this computer source which 424 00:23:46,720 --> 00:23:51,080 not powering the standby side. 425 00:23:48,679 --> 00:23:54,360 So if you put it on the motherboard you can't 426 00:23:51,080 --> 00:23:56,360 to start the computer with this source. 427 00:23:54,360 --> 00:23:59,520 In the repair video of that source 428 00:23:56,360 --> 00:24:01,640 I will also show these two sources. 429 00:23:59,520 --> 00:24:04,840 I also have this source that I also don't know 430 00:24:01,640 --> 00:24:07,480 if it works. It is a source of 630 431 00:24:04,840 --> 00:24:09,520 W. And now I'm going to mount this module 432 00:24:07,480 --> 00:24:11,000 back to the box and I'll give him another one 433 00:24:09,520 --> 00:24:14,000 test. 434 00:24:11,000 --> 00:24:17,720 I finally finished assembling it. 435 00:24:14,000 --> 00:24:21,200 So. That's what it looks like. I also put his foot on it 436 00:24:17,720 --> 00:24:25,320 this one. Forget it. So it's a screw. 437 00:24:21,200 --> 00:24:29,559 So. This is how it looks from the back. 438 00:24:25,320 --> 00:24:29,559 Now I'm going to give it some volume. 439 00:24:37,696 --> 00:24:39,716 >> [music] 440 00:24:57,347 --> 00:24:59,367 [music] 441 00:25:21,640 --> 00:25:25,799 >> So that's what he sounds like. 442 00:25:28,679 --> 00:25:33,399 So that's about all the modification of 443 00:25:31,080 --> 00:25:35,200 this subwoofer. If you like how I have 444 00:25:33,399 --> 00:25:37,720 modified this subwoofer, you can mi 445 00:25:35,200 --> 00:25:40,840 leave a comment or like or 446 00:25:37,720 --> 00:25:44,600 as you want. So. 447 00:25:40,840 --> 00:25:46,679 I usually do that with certain ones 448 00:25:44,600 --> 00:25:49,000 subwoofers. For example, if I find a 449 00:25:46,679 --> 00:25:51,399 old amp inside, i replace it 450 00:25:49,000 --> 00:25:53,200 with a not more modern one. Anyway, the speaker 451 00:25:51,399 --> 00:25:56,120 this is quite capable of carrying and 452 00:25:53,200 --> 00:25:58,600 this amplification stronger. That's good 453 00:25:56,120 --> 00:26:00,399 that this company chose to put a 454 00:25:58,600 --> 00:26:03,760 louder speaker, even though 455 00:26:00,399 --> 00:26:06,399 amplification is weaker. 456 00:26:03,760 --> 00:26:09,039 This is what it looks like, without the fan. Anyway it is 457 00:26:06,399 --> 00:26:13,799 much better. It has these holes around here 458 00:26:09,039 --> 00:26:15,480 through the back, but don't mess with anything. 459 00:26:13,799 --> 00:26:18,279 I have that grille too. I'll put them too 460 00:26:15,480 --> 00:26:23,520 grill back. All the same glued with 461 00:26:18,279 --> 00:26:25,799 mastic from this. And yes, that's about it. So 462 00:26:23,520 --> 00:26:27,720 yes So that was pretty much the video. 463 00:26:25,799 --> 00:26:31,960 I hope you liked it and I'll be back with one 464 00:26:27,720 --> 00:26:31,960 another video soon enough.