Questions & Answers for: speakers making thumping sound power

thumping when not hooked up My sub is plugged in electrically but not hooked up to the stereo and it is making a "heartbeat sound". I tried a couple different surge protector strips so that is not the

sound quality & often engine noise. If you're using the low level out's from your head unit, then try the following: 1. Make sure you've got clean power. Connect the Amp's power cable (through a fused

...making horrible thumping garbage sounds i just bought a hifonics zeus z400 2-channel amp and the green light comes on but the sub is making a constant rumbling, thump, heartbeat even with the volume ...

...thumping noise again. it makes the noise whether its hooked up to my receiver or not. what can i do to fix it, or is it useless??? Hiya, could be the power supply or possibly the amp circuit that has ...

...making a thumping noise while the head unit was turning on thenn while is was playing when u turn the amp up it would start pulseing with no music playing. while it was playing at low level u could ...

...speakers in the mix the sound becomes poor, is this due to mismatched resistance or not enough power left to driv due to using hi out and line out at same time? Ideally I wanted to have the 4 ohm ...

...thumping noise comming out the speakers. can u tell me what mite be wrong. Good be a ground issue from the headunit. Try running the amp off another source (another deck, an ipod etc) See if it goes ...

...thumping loudly. Just a rhythmic thump. Even without any tunes pumping out. If I bring the gain/level back down a bit, it stops. Whats wrong? I want to turn the gain/level up more to get more out of ...

...sound and low volume. When I investigated it I found that the ribbon cable going to the digital input board had three bent pins, I tried to move them back and it helped a little bit but the buzzing ...