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Help Troubleshooting Sub with No Sound
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<blockquote data-quote="easterbran" data-source="post: 8663664" data-attributes="member: 676138"><p><span style="font-size: 22px"><u><strong>SOLVED!</strong></u></span> There was a loose solder joint on a resistor on the Power circuit-board in the amp. </p><p></p><p>I had hooked my phone directly to the sub using a RCA to 3.5 mm mini adapter and got no bass, so I knew it was something with the sub.</p><p></p><p>I then started going through the internal amp connections with the DMM (checking for continuity) when I noticed that the terminals that output to the sub speaker were reading only a few mV. I used a 9V battery to provide power while testing. Sure enough, there was a bad joint, which I quickly added some solder to. If you bent the leg <em>just</em> right, it would make a connection, which explains why it used to work intermittently (until the bass vibrated the connection back out of place). Bass hits hard and sounds great <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite1" alt=":)" title="Smile :)" loading="lazy" data-shortname=":)" /></p><p></p><p>[ATTACH]3110[/ATTACH]</p></blockquote><p></p>
[QUOTE="easterbran, post: 8663664, member: 676138"] [SIZE=22px][U][B]SOLVED![/B][/U][/SIZE] There was a loose solder joint on a resistor on the Power circuit-board in the amp. I had hooked my phone directly to the sub using a RCA to 3.5 mm mini adapter and got no bass, so I knew it was something with the sub. I then started going through the internal amp connections with the DMM (checking for continuity) when I noticed that the terminals that output to the sub speaker were reading only a few mV. I used a 9V battery to provide power while testing. Sure enough, there was a bad joint, which I quickly added some solder to. If you bent the leg [I]just[/I] right, it would make a connection, which explains why it used to work intermittently (until the bass vibrated the connection back out of place). Bass hits hard and sounds great :) [ATTACH]3110._xfImport[/ATTACH] [/QUOTE]
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