I have a Audiolab M-ONE class AB integrated Amplifier. Ita has a stated power of 65wpc, it is utilizing the LM3886TF by Texas Instruments.
I have had mine for about 2 years and it has been mostly a great little amp, I am driving some PSB Alpha P5s speakers and they are meaty and balanced, great sounding and over excelling in a lot of ways. Great for a small room like a bedroom. I am experiencing a weird fault with mine recently and I am hoping someone may be able to help. The fault I am getting is that there is some clipping or crackling in the midrange on low volumes. Interestingly it does not seem to happen when driving at higher power / volumes. I initially thought it was a speaker cable or connection, I have tried new cables and speakers and the fault is with the amp, I have tried different inputs, Bluetooth / RCA inputs. Still the weird annoying problem is there at mid to low volumes, its intermittent and very annoying. Its otherwise works great and would be a shame to get rid of it.
I have of course tried emailing AudioLab with no reply to date.
Any help with this as suggestions to test or if anyone has a service manual/ schematic for the M-ONE it would be greatly appreciated.
I have had mine for about 2 years and it has been mostly a great little amp, I am driving some PSB Alpha P5s speakers and they are meaty and balanced, great sounding and over excelling in a lot of ways. Great for a small room like a bedroom. I am experiencing a weird fault with mine recently and I am hoping someone may be able to help. The fault I am getting is that there is some clipping or crackling in the midrange on low volumes. Interestingly it does not seem to happen when driving at higher power / volumes. I initially thought it was a speaker cable or connection, I have tried new cables and speakers and the fault is with the amp, I have tried different inputs, Bluetooth / RCA inputs. Still the weird annoying problem is there at mid to low volumes, its intermittent and very annoying. Its otherwise works great and would be a shame to get rid of it.
I have of course tried emailing AudioLab with no reply to date.
Any help with this as suggestions to test or if anyone has a service manual/ schematic for the M-ONE it would be greatly appreciated.
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I suggest you post a schematic.
Does the problem present in both channels, and at same circumstances, same time? If only one channel, swap speakers, then source channels to narrow problem.
Good luck!
Does the problem present in both channels, and at same circumstances, same time? If only one channel, swap speakers, then source channels to narrow problem.
Good luck!
Could this be a speaker relay issue I wonder. Low volume is where the relays play up, turn it up and the extra load current overcomes any film or tarnishing of the contacts and the problem goes away.
If the amp does use speaker relays then it may be possible to clean the contacts if the relay cover is removable.
If the amp does use speaker relays then it may be possible to clean the contacts if the relay cover is removable.
Mooly, I have the same hunch, I have ordered a replacement relay and will try that as my next option.