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Loss of one channel to speaker

I have lost output to one speaker but get both channels on headphone socket. Switching input wires has no effect but when I press mono button I get sound from both speakers.
This is only happening on Phono input everything else works ok.
Sugden A28 amplifier

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Check to make sure your

Posted on Feb 01, 2012

  • conryan410
    conryan410 Feb 01, 2012

    Also worth checking that your speaker are wired in phase (correct connection of positive + and negative- wires to corresponding terminals) I just fixed mates C320 v easily. Firstly had cleaned all switches and pots with switch cleaning solvent and then when checking wiring realised that he had stripped the cables so far back that they were badly shorting out! eejit!

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When you say switching input wires you mean your source? that you switch it? you only have switch problem, it is mechanical type swutch need to clean only, if still possible. i dont know if you can find replacement.

Posted on Mar 25, 2008

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1 Answer

How do I fix the stereo amplifier speaker channels so that both speakers work.


First things first. Check the speaker connections and wire to be certain it is all good. Because if it is not then even when you get the missing channel going it will blow if the cables are faulty.
Next try a pair of headphones. If you can hear sound in both channels there is nothing wrong with the power amp. Instead it is the headphone socket, which is switching the channel off. You should replace the headphone socket if it is.
If the channel is still missing, then you must pull out the plug and look inside the unit. Either follow the missing channel back from the speaker socket or go straight to the heat sink. Look for damaged or burnt components. Remember the good channel's components are the same as the bad one. So compare the two. With the good channel as a guide to what they should look like.

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Denon receiver not working surround output


If everything is connected correct, the only thing I can think of, is you don't put in a surround signal. If you only feed 2 way stereo, only two speaker will work. Also if you switch to stereo, the other channels will stop working. Check the cables, the settings and the input.

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Onkyo TX-SR309 - Sound output only from 2 speakers from five. Hi, I have a Onlyo TX-SR309 receiver connected to a Wharefedale MS100HCP speaker package. It was working fine for 15 months but now the...


Some info from the manual:
The Dolby Digital and DTS listening modes can only be selected if your Blu-ray Disc/DVD player is connected to
the AV receiver with a digital audio connection (coaxial,
optical, or HDMI).
• The listening modes you can select depends on the format of the input signal. To check the format, see "Displaying Source Information"
• While a pair of headphones is connected, you can select the following listening modes: Mono, Direct, and Stereo.
• While Speakers A and B are on, you can select only the
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Plus this Bit of info on the speakers A and B buttons.
While Speakers B is on, channels are reduced to 2.1 in the
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I'd need to know what mixer you have, to know if there is a [line out] connection socket and an [internal amp in] connection socket.

"each with own poweramp" I presume means the ep1500's and NOT that the speakers are active (ie containing amps)

***If any of your speakers are active, ask the question again, with more detail.***

So if all your speakers are passive, I offer the following.

I assume there is [effect send] and [effect return] on the mixer

effect send>quadraverb>effect return

mixer line out > eq > compressor > sonic maximizer > crossover

sub output of crossover> amp > sub
high output of crossover to mixer's internal amp input
mixer's speaker output > main speakers

monitor output > other side of eq (>other side of compressor if desired, but use sparingly ) > other side of sonic max if it is true stereo , otherwise skip > amp > monitors

If your mixer doesn't have an input to its internal amp, we are "back to the drawing board"
With questions like this it pays to give as much detail as possible; model and make of each component etc
I have done my best with the the info you have provided.
Don't feed amp outputs into powered speakers

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How do i wire up an effects unit for the eurorack pro RX1602? It only has a mono/FX output socket.


In your user manual on page 7 is figure 3.2 wire your effects unit like the Virtualizer they show... driven by that mono/fx send and the the effects return returns coming back into unused channels...

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How do I get a stuck vcr tape out?


Hello,
As far as I examine this model on the web,I discover that your TV has the following features as:
  • Feature: Combination TV/VCR featuring 13-inch TV and 2-head mono VCR
  • Feature: Front AV input jacks for game system; 181-channel tuner for access to unscrambled cable broadcast
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  • Feature: Mono output and built-in speaker; headphone jack
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This means that you do not have "A/V output" jack to complete your desire..
Sorry about it..
Take care and please Remember to rate/vote and give me 4 Thumbs Up
for Helping out the Community :)

Hope this helps!



http://www.csd.toshiba.com/cgi-bin/tais/support/jsp/home.jsp

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1 Answer

No sound


There can be any number of reasons for this problem - solve it diagnostically by starting with something that you know is working and work through systematically to the other end.
  1. Test a microphone on a separate amp to make sure it works okay. Check amp and speakers working. Check that all output cables from mixer to amp are working by testing separately.
  2. Plug microphone into a channel on mixer. Also plug in headphones and turn headphone volume control up.
  3. Make sure input sensitivity knob is turned up a bit (say half way) and main output faders (yellow) are up.
  4. Check that channel is turned on (little button just above the channel fader- needs to be pressed down)
  5. press pfl (pre-fade listen) button (next to button to switch channel on)- do you get any sound on main output or headphones or any indicator lights on mixer to show signal is getting that far (eitehr the individual channel metering lights or the main ones in the central section)?
  6. turn off pfl - make sure channel fader (slider) is up - normal position is ) - about 3/4 of way up. Check lights again on individual channel and main output section - any signs?
  7. Is the sub mix button for the channel pressed down - in which case you will need to bring sub mix (red) output faders up as well as main faders.
  8. If you have got signs of signal on the individual channel but not main see if the channel has been routed somewhere odd (like a subgroup of channels).
  9. Plug a working amp and speakers into one of the auxiliary outputs and use the relevant auxiliary send knob (on each channel just above the faders and pfl switches) to pan some signal to that auxiliary out - do you get anything? There is also a headphone socket for listening to the auxiliary channels (with a selector switch /knob to determine which one - make sure it is in the right position) try listening to the auxiliary output with headphones - anything? If yes the problem lies in the main output section.
  10. Check that there is not a jack plug in the insert socket (to route signal through an external effects unit) without a matching return jack being plugged in - if appropriate is relevant effects unit switched on and correctly set up - if unsure remove the insert plug to take it out of the system.
  11. Make sure any mute buttons are not switched in on main outputs.
You can download a full user manual here http://www.allen-heath.com/gl/gl2400

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No output from main outputs


apply a spray contact cleaner in headphone socket(the place where you put your headphone jack)-and insert the jack in and out many times because it maybe problem inside-check your speaker cable for good condition.and firmly connected.

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Bridged


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