For the owners of the humboldt audionet

[ciro71]

Hello, I own a beautiful Humboldt Integrated Amplifier audionet, I noticed that there is a fairly noticeable hum when I put my head on the amp, do I have to worry? Thanks for a possible answer.

 

[matakana]

Hello, I own a beautiful Humboldt Integrated Amplifier audionet, I noticed that there is a fairly noticeable hum when I put my head on the amp, do I have to worry? Thanks for a possible answer.

Try the new ifi dc blocker, you can always send it back, not sure if its detrimental to the overall sound or not as its just available now.

 

[ciro71]

Thanks for the reply, but is there anyone trying to get close to the amplifier to see if they hear any hum?

 

[matakana]

Thanks for the reply, but is there anyone trying to get close to the amplifier to see if they hear any hum?

Thats what iam referring to, its possibly down to DC on your mains! This maybe causing the hum.

 

[ciro71]

Thats what iam referring to, its possibly down to DC on your mains! This maybe causing the hum.

Thanks for the answer you are very kind indeed the only one

 

[musicfirst1]

Call Bill Parish at GTT Audio in New Jersey. He is the North American distributor and will be able to trouble shoot with you. FWIW, my Audionet MAXs are dead silent in my system.

GTT Audio
908.850.3092
Monday—Friday: 8:30AM–6:30PM EST

 

[ciro71]

Call Bill Parish at GTT Audio in New Jersey. He is the North American distributor and will be able to trouble shoot with you. FWIW, my Audionet MAXs are dead silent in my system.

GTT Audio
908.850.3092
Monday—Friday: 8:30AM–6:30PM EST

Thanks for the reply but I am writing from Italy

 

[Fohlenfan]

I fear it will not help you to ask other users. Humming and Noise Trouble are often an individual problem depending on your net and power infrastrucure at home. I owned about 10 or more high end equipments who did not do a single noise at a dealers place, but were badly humming at my home.
it could be all kind of equipment. Amps, streamers, dac‘s, power-filters. Had everything from this in the past. It just depends on the power implementation in the equipment. Some are noisy some are dead quiet. And I tried a lot of things to solve that issues. Dc Blockers, line filter, voltage reducer. But if you are unlucky nothing helps.

 

[ciro71]

I fear it will not help you to ask other users. Humming and Noise Trouble are often an individual problem depending on your net and power infrastrucure at home. I owned about 10 or more high end equipments who did not do a single noise at a dealers place, but were badly humming at my home.
it could be all kind of equipment. Amps, streamers, dac‘s, power-filters. Had everything from this in the past. It just depends on the power implementation in the equipment. Some are noisy some are dead quiet. And I tried a lot of things to solve that issues. Dc Blockers, line filter, voltage reducer. But if you are unlucky nothing helps.

Thanks Fohlenfan for the reply, I noticed that the hum increases in the evening in the morning the noise is reduced to a minimum.

 

[Fohlenfan]

Thanks Fohlenfan for the reply, I noticed that the hum increases in the evening in the morning the noise is reduced to a minimum.

did you leave the amp on power in the night?

 

[ciro71]

did you leave the amp on power in the night?

No no as soon as I finish listening I turn everything off

 

[Fohlenfan]

No no as soon as I finish listening I turn everything off

So it is likely that the transformer will become saturated during the day And not that there are voltage differences through the net, that causes the issues i fear.

 

[ciro71]

So it is likely that the transformer will become saturated during the day And not that there are voltage differences through the net, that causes the issues i fear.

what do you advise me to do?

 

[Fohlenfan]

what do you advise me to do?

You can try a DC Blocker or a voltage reducer, but as I told you before, if things run bad nothing will help.
by the way. I like your speakers. I know two persons owning them and they using it with complete Nagra set up. Unbelievable good to my ears.

 

[Uk Paul]

It does sound like a DC issue, secondly mains voltage on the high side for the power section of your Humboldt. Can you measure your mains AC?

 

[audio1]

Hello, I own a beautiful Humboldt Integrated Amplifier audionet, I noticed that there is a fairly noticeable hum when I put my head on the amp, do I have to worry? Thanks for a possible answer.

One other thing worth checking is the polarity of your power cord. On my Heisenbergs the Phase or positive connection is on the right hand side of the IEC inlet. (earth pin on top) It should be on the left according to the IEC standard. Looking at photographs it also appears to be the wrong way round on the Humboldt. The phase and neutral in the power cord have to be switched around.

 

[ciro71]

It does sound like a DC issue, secondly mains voltage on the high side for the power section of your Humboldt. Can you measure your mains AC?

I can do it but I already tell you that during the day it changes

 

[ciro71]

One other thing worth checking is the polarity of your power cord. On my Heisenbergs the Phase or positive connection is on the right hand side of the IEC inlet. (earth pin on top) It should be on the left according to the IEC standard. Looking at photographs it also appears to be the wrong way round on the Humboldt. The phase and neutral in the power cord have to be switched around.

I'll check the buzz tonight, but I update you that it was phase reversed

 

[Troquio]

Hello ciro71, did you fix that hum on Humboldt amp?