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Low volume after accidently plugging input lead into P.A. output speaker jack

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Is there any way to connect my casio ctk1100 to a laptop??


Yes. But it depends which connectors you have on your laptop. If you have a small (3.5mm) stereo jack input, then you need one cable with a small stereo 3.5mm jack on one side and a big stereo 6,3mm jack on the other side. (Take a look at the picture below).
Then you plug in side with a small stereo jack in your laptop "line in" input and other side of the cable with a big stereo jack to your Casio CTK-1100 Phones/Output plug on a keyboards rear side...

Be sure to adjust the volume on both the Casio (output volume) and laptop (input volume)...

Cheers!



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Mar 01, 2017 | Casio Music

1 Answer

Marshall 80RCD Boost channel is distorted and low volume


It could be a couple issues in that section. Start by cleaning the contacts and switches to make sure it is not dirt. Also check to make sure the plug you are using is right for the jack- just to make sure everything is connecting as it should and nothing is inadvertantly getting shorted- such a 2 pole plug plugged into a 3 pole jack.

If those are all okay, the issue is in that boost channel section. Check to see if you are getting both power rails at the IC's, measure on a 4558 chip pin 4 to chassis should be -15 volts and pin 8 should be +15 volts to chassis. if you do not have this voltage, check the wiring, check the PC board for bad solder joints and check capacitors. Also check the physically larger resistors.

If you have the voltages, put an audio source on the input and set up a headphone with test leads, or better- an impedance matching transformer with test leads on the high impedance winding- put one to ground, with the other lead, move from IC to IC to locate the area to look at. You can get a data sheet for the 4558 here: http://www.ti.com/lit/ds/symlink/rc4558.pdf It is a low noise version of the 1458 family of op-amps. Check each IC at the inputs and the output, once you locate the stage where inputs are clear and output is garbled, that IC may be the fault, or something in the vicinity- usually it will be the IC. You can get any configuration of the 4558 you need through Mouser or Digikey, and Digikey does ship worldwide http://www.digikey.com

Once you get the new IC in, you should be groovin in no time.

Jan 30, 2012 | Music

1 Answer

Hooking up the speaker to an amp, using the rca line out of the amp i have no volume control from the amp knobs, can i hook the speakers up to the amp from the speaker out ?


You should NOT under any circumstances connect an audio input lead to a speaker output jack!
The RCA jacks you are trying to take output from ore "pre fader" which would be solid "line level" and not controlled by volume controls. Tap off the INPUT to the amp... you should be using balanced lines for the interconnects. RCA jacks are unbalanced lines. You can drive several inputs from a line level output of a mixer for example using a splitter cable.

Aug 23, 2011 | Harbinger APS12 12 Powered PA Speaker

1 Answer

Behringer ub802 mixer is buzzing even when no input when i hook my head phones into the headphone jack and main output jack


If it buzzes when you have no inputs AND no output leads connected, there is a problem with the power supply... HOWEVER if you have used UNBALANCED output cables instead of the REQUIRED TRS BALANCED output cables, it is possible the noise is being driven backwards and that is what you are hearing. Note that at full gains, there often is a tiny bit of noise, usually hiss. Also make sure the supply is powered from the SAME receptacle as the equipment this drives such as an amp or powered speakers.

Jul 18, 2011 | Behringer Eurorack Ub802 - Ultra Low-Noise...

1 Answer

Clip light is on even when no input and when bass is plugged in input low volume and distortion at speaker output


One half of the power amp has failed. You can damage the speaker... do NOT use this until repaired.

Apr 14, 2011 | Behringer Bx4500h Ultrabass 450w Bass...

1 Answer

What kind of cable do you need to connect a Kurzweil K2500S to the amp?


Hi. You can use standard 1/4 inch jack to jack audio cables (ordinary guitar leads will work fine) to connect the MIX outputs to a keyboard combo amp. If the amp only has a mono input, just use one cable from the MIX output marked L to make the connection. Remember to keep the amp volume turned down until you have plugged in the cable(s) from the K2500S. All best.

Apr 09, 2011 | Music

1 Answer

My deville has just stopped producing any sound what soever. All the tubes glow and the red power light is on but no sound. I have tapped the sides of all the tubes and they all register a sound except the...


The first thing i would do is not leave it on in this way for too long. You could blow out a very expensive Transformer if its a faulty speaker. The worst thing you could do to a TUBE amp is run it without a speaker . I would test the speaker first. Just remove the wires going to it. And connect the speaker to either a car stereo or house system at low volume very low. And see what you get. if it works ? Good! Now check your guitar chord/wire. Try different ones try different guitars. If that doesn't work . Look into the input jack on the instrument input hack on the amp.. They do come loose off the board.Either get a new input jack or resolder the old one. if you only have one guitar look at the guitar output jack. Loose wiring on the guitar could cause this also. Dirty In and out put jacks could cause this. A pencil with Very fine sand paper wrapped around it will clean a dirty input/output jack. Try these things. Just remember poking around your amp is Dangerous. The electrical components hold a charge even unplugged that can kill you. No joke..

Dec 26, 2010 | Fender Hot Rod Deluxe Guitar Combo...

2 Answers

I get no sound at all when I plug in to the input and its not my lead or guitar, how can I fix the amp?


This is probably not a DIY repair. You best take it to a repair shop. Likely the power amp has failed or other common problems are broken connectors/jacks, broken volume pots, and finally circuit board cracks.

Nov 20, 2010 | Fender Frontman 212R 100W 2x12 Guitar...

4 Answers

Marshall MG50 DFX amp line out/headphones not working


Contrary to what's posted above, the Marshall MG series does not pass the speaker power output through the headphone jack, and inserting the headphones into the jack does not disable the speaker. The headphone amp is a separate circuit and it's input is taken before the master volume. So Jan's post is exactly right. Turn off the master volume and turn up all the other gain/volumes as high as they will go. The other issue is that the headphone jack's output does not drive low efficiency headphones well, so you need some headphones similar to Sony's MDR-V700s to hear it well. Earbuds just don't cut it.

Mar 07, 2010 | Marshall Mg50dfx 50-Watt Combo Guitar...

1 Answer

Is it possible to obtain a replacement pre-amp board for a yamaha hs6 organ? there is a signal coming from the board which can passed through an external guitar amp, via the left or right speaker jacks, to...


Check all the capacitors one at a time for leakage.You might also have a transistor in the preamp stage which is starting to go bad. Whatever you do though don't use the speaker output jacks of the organ as line outs into the input jack of the guitar amp. In a properly working organ you could destroy the output transformer and the input stage of your amp because most speaker outs are A.C. voltage to drive the speakers not low level D.C. which is what your amp is used to. Let me know how you make out.

Jan 21, 2010 | Music

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