One of my Adam A5X speakers suddenly started making an annoying sound. it can be described as a hum in the middle freqquencies. I would guess it has something to do with the wiring? I will contact the shop I bought them from tomorrow. Fredrik, Stavanger, Norway

Sounds like the output capacitors are breaking down, or you have a faulty pickup causing feedback, this can also be caused by bad cables close to ac power causes hum and distortion.

I am Going to do a little guessing. I am not a speaker pro by no means. but i have been using them my whole life.. as a fellow musician. i've run into this half a dozen times. each was different. so you say tremelo effect. could you describe as a harmonic vibration as well." if so look for anything (start w/ the speaker and work your way out) your looking for things like a loose nut or bolt. the speaker should not wobble or move at all. look for separation in the speaker cone and diaphram. then work your way out.. your looking for anything can potentially rattle, and usually against something . check around the tube mount, be careful. dont want it getting broke or you electrified.either that, or turn your effects off. just kidding. gtood luck

AC hum comes from poor grounding of components.

Incorrect connections or volume settings.

• In powering up, mixer first then amp

• In turning off , amp first then mixer


If hum still persist, without the mixer connected

then speaker amp may need servicing.

For some reason the soft on protection circuit has failed. it is not a simple fix and would require the amplifier module to be removed from the speaker to assess the damage.

do you mean you got a new one and it just has a different fuse? if so you may have already got a newer model or older model where the pc board inside has differnt "Revisions". just meaning the designers changed a thing here or there such as rev. a or rev. b. shouldn't be a big deal but it does state you do not have identical speakers hence they may also filter sound differently.

If this occurs with no audio input, exercise your warranty immediately.

Transformers RARELY fail. It is likely that either one side of the amplifier has shorted or there is a failure in the rectifier/filter circuit of the power supply. Take it for repair unless you are adept at electronic repair. Do NOT continue to replace the fuse as you MAY cause futher damage. Use a 25 or 40 watt lamp in series with your power cord to limit current while troubleshooting.

All sound is generated digitally and the pedal doesn't modify the sound, it just sustains the generator. This is a strange problem and best suggestion iis to find another unit and compare... it may be a characteristic of the design. There isn't anything that you can do to change this. It could be there is a bad ground inside the unit or the digital data is corrupt in the processor. The fact that it is on a particular set of notes is strange...I just checked on my Yamaha piano that is essentially the same electronics and I notice that on one octave above the middle when one strikes F# and G they "ring out". Now this MIGHT be due to the characteristics of the speakers. Those particular notes seem to clash more. I don't have other speakers on mine and unfortunately you did not mention what brand model you have attached. Consumer grade speakers like fancy stereo speakers do NOT do well on these instruments. One has touse pro grade speakers AND use proper interconnecting cables. The speakers, powered type, must be powered from the SAME receptacle as the piano to avoid ground loops.

Change the audio amplifier ic are fried