Question about Roland Kc-150 65-watt Keyboard Amplifier Amp Kc150

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Background distortion at all volumes and input levels Can't get a clean response-always edgy

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Take your unit to a repair shop you trust. i believe your unit may have a bad solder/ grounding issue. goodluck

Posted on Mar 19, 2011

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Posted on Jan 02, 2017

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Which input db to choose for mixer input in carlsbro amp powerline 2000 because there is 3 options +3db 0db -3db, i think 0db is high?


That will depend on what instrument you are planning to plug into it. Set the mains and the channel volume to a low-reasonable level and plug in a play. It the input is distorting, you need to use a lower input level. If it's too quiet, you need to use a higher input level.

Mar 24, 2016 | AMP Music

1 Answer

RESET ON BOARD FX


The clip light means your input signal is too high and distorting. Turn down the attenuator(input) knob until it goes out, use the channel volume for level. It should have a knob for the names of the effect selection.

Mar 22, 2014 | Behringer XENYX 2442FX Mixer

1 Answer

When i plug an MXR micro amp (volume boost) in front of the supersonic, it works on the clean channel but does not affect the burn channel, Why? By the way, when plug in to the effect loop it does work...


DO NOT USE a guitar pedal in effects loop as it has the WRONG signal levels.

Also, when you boost the gain preceeding a distortion setting in an amp, the amp will just limit out and it will appear that the effects in the amp aren't working... but what is happening is you wind up with too much input signal and the "flat topping" distortion occurs right at the inout of the amp so no further can occur when you select a distortion in the amp.

Jun 22, 2011 | Fender SuperSonic 22 22W 1x12 Tube Guitar...

2 Answers

FM 65R plays and sounds great for about 5- 10 minutes then it sounds weak and distorted. If I play directly into the power amp input it sounds great again just no control for the volume and tone.


Also the volume will probably be lower going into the line level PA input... If the amp is shutting down for thermal reasons, driving it less might not get to the point of shutdown. The schematic shows a temp sensor that reduces and shuts down the amp if the heatsinks get to hot. Possibly you are driving the amp harder than it is intended, If it is as loud (I doubt it) driving the PA input, then I would expect it to shutdown, but you would probably have to drive it harder than your guitar because guitar levels are well below line level. The amp claims 65 watts... don't believe everything you read in spec sheets... You should be able to generate 100 Db of sound with it... The more distortion you use will drive the amp harder and heat the heatsinks faster.

May 13, 2011 | Fender Frontman 65R 65W 1x12 Guitar Combo...

1 Answer

Distortion on vocal reproduction on Vocalist Live 2. Even with input volume down to minimum a loud vocal performance produces distortion on single voice and harmony output.


You need to check the actual signal levels to make sure they are within the specs for the unit. The mic input is low impedance. Your mic should be like a Shure SM58 or equivalent. The output is fairly high... up to +14DB which will require you to turn down the trims on a mixer this runs into or set a -20Db pad at the input. I suspect your distortion is from the device output to the mixer input. It is VERY important that the mic does NOT "hear" the speakers as the feedback loop resulting will be mass distortion. The guitar should also not "hear" the mains.

May 07, 2011 | DIGITECH VOCALIST LIVE 2

1 Answer

Mixer does not sound "clean"; almost distorted


If more than one input is bad, then problem has NOTHING to do with the preamps. Check list:
1. Make sure you are using BALANCED lines everywhere... either XLR or TRS cables.

2. Make sure ALL interconnected equipment, mixers, amps, powered speakers, CD players, etc. are ALL powered from the SAME receptacle or power distribution unit.

3. Do proper setup. Select each channel PFL and set the trims so the indicator never goes into clipping, but is in the 70% range during max volume input to mics, etc..

4. During operation the sliders should be at least 50% up on used channels and the mains. Setting of levels throughout the system is important for noise free operation. Using EXCESS gain at some point results in distortion and noise. Using sliders near the bottom position results in poor signal to noise ratio.

Now re-read #2 above... and believe it. I have seen a lot of equipment blown due to ground bounce of building power. That is why the pro's run power back to their mixer from the area where the amps are powered.

Apr 28, 2011 | Behringer EURORACK UB2442FX PRO Mixer

1 Answer

My fender hot rod deluxe is distorting in clean channel when I push the volume past 2


Realize that the number on the volume control is only relative... it means nothing regarding what the amp can produce. With a high level output guitar you can easily drive the amp into distortion at very low volume control level settings... what counts is the actual output sound volume and specifically the voltage output going to the speaker. Once the amp reaches saturation, any further input just pushes it into distortion or "flat topping".
An oscilloscope on the output will quickly show when amp starts to flat top.

Jan 17, 2011 | Fender Hot Rod Deluxe Guitar Combo...

1 Answer

I just got a mackie 1640i mixer yesterday. I followed all of the correct steps in setting it up towork with logic pro. However, when listening to any audio coming through the mixer, there is this awful...


Likely you haven't got the levels set properly. Start with the trim controls (head end gain) Make sure you are not clipping there. Also verify you aren't overdriving your amps. Remember that the outs are line level, not mic level so the gain oof following equipment needs to be set for line level.
ALWAYS USE balanced audio line from this unit... either XLR or TRS type cables. ALWAYS power ALL interconnected equipment from teh same receptacle or source to avoid ground bounce damage to circuitry. You don't say what you are using to record with. Make sure it has balanced inputs. For instance, connecting cables from this to the audio input jack of a PC which is unbalanced would be a disaster in audio quality. There would be a problem of levels and the unbalanced thing... You haven't given us enough information of your hardware configuration to analyze the problem more than what I have said here.

Dec 26, 2010 | Mackie Onyx 1640i Mixer

1 Answer

How to set up with amp and distortion pedal


With everything switched off. I will surmise that you are using the onboard battery with the foot pedal and not a power supply.
1. Plug lead from guitar/instrument into INPUT side of pedal
2. Plug lead from OUTPUT side of pedal into amplifier INPUT.
3. Turn amplifier volume to about 10 o'clock - to stop blowing your ears out.
4. Turn volume up on guitar to acceptable level.
5. press foot switch on pedal and adjust pedal controls to suit your type of distortion.
6. Play like Hendrix.
Good Luck
ps Just as an after thought rechargeable 9volt batteries are the way to go. I've been using them for years as I always get caught up in the power cable.
If you're going to add another pedal like a Phaser, Compressor, Flanger or what just use small connect leads between each pedal but always, always put the compressor pedal last in the line.

Sep 12, 2009 | BOSS AUDIO SYSTEMS Boss Ns2 Noise...

3 Answers

Marshall mg100hdfx loud fuzz and distortion and no guitar sound


Check your input (guitar signal).
Also, check your gain and volume levels.
Make sure that you have a reliable, steady, and clean power source as well.
If the problem persists, contact the store from which it was purchased. There are a lot of things that can go wrong internally with the cheaper Marshall models.

Jun 25, 2009 | Marshall MG100HDFX 100-Watt Amplifier Head

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