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The protection on one of my db Opera Live 405 speakers keeps cutting in. It works fine for five minutes then shuts down. Has done so virtually since new, have had it looked at and couldn't find the problem. Can i remove the protection and rely on the limiter of the other speaker? It doesn't work now, have nothing to lose.

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6 Suggested Answers

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

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Posted on Jan 02, 2017

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gadget
  • 14 Answers

SOURCE: Rear left speaker not playing

If the speaker itself is working then the problem will most likely be the connection point where the speaker plugs into. If you dont know how to check for this problem, i dont really want to tell you just in case you hurt yourself. Take it to a shop and have it looked at by someone thats knows what there looking for.

Posted on Sep 07, 2006

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SOURCE: Speakers cut out after about 10 minutes.

Does the system perform normally- as long as it works? If yes, then the Amplifier is at fault. It cannot be the output Transistors or IC, as the sound is coming from both channels. If you know solid state servicing, I advice replacing all the electrolytic capacitors in the Output stages of the Amplifier. Over a period of time these El Caps dry out, and cause headaches.

Posted on Oct 04, 2006

  • 12 Answers

SOURCE: Only tinny sound coming from the speaker MS904

The "tiny sound" may be a blown woofer you are only getting sound from your high section.

Posted on Dec 23, 2007

  • 1 Answer

SOURCE: left speaker LED flashing, woofer and tweeter clicking...

The flashing blue LED and loss of sound on the Alesis M1 powered monitor is caused by failure of capacitor C8 (220uF, 35V) on the power supply board. It dries up due to its proximity to resistor R4 (47K, 2 W) which gets very hot. This is a design fault.

Remove the power supply board (4 corner screws and 2 mains connector screws) and disconnect the two plugs. Carefully desolder C8 and replace it. Its value is not critical (220 to 470 uF will do) but it should be a 105 deg. type, preferably at 50V.

Remove R4 and replace it with a similar resistor with its leads bent so that it is nowhere near C8, otherwise the fault will return. One end may be connected to one of the existing R4 solder pads (furthest from rear of board), and the other to the top end of resistor R3. Check that you have connected it correctly by inspecting the PCB tracks.

Replace the board and all screws and plugs before testing.

Posted on Jan 01, 2008

djnick989
  • 1067 Answers

SOURCE: RCA HOME THEATER SYSTEM REAR SPEAKERS NOT WORKING

cheak the mode u are in theter mode reg sterio mode wont do the back ok cheak settings dsp modes

Posted on Jan 20, 2008

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I have two sp2 speakers i am using a ipod numark dj machine connected through my 2600 watt peavey amp it keeps blowing out one speaker can you tell me why


The SP2 speakers are rated at 1000 watts PROGRAM which is around 500 watts RMS MAXIMUM. You should be using an amp capable of a maximum of 500 watts a side... Your amp is WAY too big. You will have to throttle it down. The speakers have the protection for the tweeters but NOT for the woofers. At five hundred watts RMS and 8 ohms the current is: P = I^2 * R so I^2 = 500/8 = 62.5 so MAX current is 7.9 amps. I recommend you put a 8 amp FAST BLOW fuse in the speaker leads. If the fuse blows, you have saved another speaker and you are DRIVING them too hard. For greater safety make the fuse a 7.5 amp fast blow. Also get a sound meter. The max on these speakers is 125 Db at a meter distance... and in your venue you should NOT exceed 100 Db to be safe with the OSHA regulations regarding hearing protection... I suspect you are driving the speakers too hard. One side may be getting more bass. The speakers are rated down to 55 Hz. DO NOT boost bass up as you will overheat the speakers. If you are using microphones, be careful of feedback, especially that above hearing range. If you need real low bass, then get an 18 inch subwoofer. No matter, stay within safe sound levels to avoid lawsuits and hearing loss... I know several deaf musicians...

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I have a peavey power amp PV2600. of late after powering, it keeps on cutting off for seconds before working again. My tech tells me it might be dying off. Please advise problem and how to fix. Thank...


"Dying off"... Time for getting a new tech... that is NOT a professional definition. It has an intermittent problem. These can be hard to catch in the act. This amp is incredibly complex in the output power amp section with many components to reach the power level they do. There is over-current protection and if you drive it too hard such as putting LARGE BASS pulses into it OR putting too many speakers on it, the over current protection will be fired and it will briefly shut down. Do this test: When the unit does this, cut the mixer driving it down by 3 to 5 DB and see if it behaves. If it does, then you are exceeding the trip point of the protection circuit. This can be ALSO caused by a failing speaker OR if the speaker is being driven too hard and the voice coil moves too far. This reduces the back EMF and current spikes. Your speakers should be rated TWICE the power capability of this amp to be safe.

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You are lucky that you have good protection circuits - otherwise by now you would have blown the output stages.

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Power cuts off


This is not a fuse problem. I would suspect that the output amplifier section is getting too hot and shutting down. Check you speaker cables and make sure that they are not shorting out at all. If they are OK, then there is a problem with the amp itself that will require bench time to resolve.
Keep us posted.
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Samsung 5-Disc 1200-Watt Home Theater Surround Sound System My Home Theatre System is keeps shutting down by its self. before it shuts down the screen says protection mode and then shuts down. i have...


If the unit shuts down almost immediately without sound, you have an electronic failure of the audio amplifier.

However if you must play the unit up above quiet background levels, you likely have a shorted speaker wire. With home theater systems, you have the luxury of trying different surround modes and speaker level settings. It's not unusual, for example, to have a loose wire strand going to the center speaker. In stereo, the system works fine. As soon as you switch to a surround mode, the amplifier senses the short and shuts down to protect itself.

Check those wires really close - I bet you'll find it there.

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It sounds like you either have too low of an ohm load or the voltage is dropping at the amplifier's power terminal.

With your multimeter set to DC volts, the black meter lead on the ground terminal of the amp and the head unit on (so the amp will have remote voltage applied), touch the red lead alternately to the B+ and remote terminals of the amp. If the voltage is below ~11 volts, you need to check the wiring feeding whichever line is too low.


If the voltage remains near or above 12v, disconnect one speaker and see if it shuts down. If it doesn't, disconnect that speaker and connect the other speaker. If it only shuts down with both speakers connected and the voltage is staying above 12v, the ohm load is probably too low and you'll need to rewire the speakers.

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You have a power supply circuit problem,you need a qualified serviceman near you.

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