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Help needed with subwoofer problem
#1
My Atohm V38s subwoofer has arrived, but I’m having a bit of a problem.
I wonder if anyone can help.
Its making a rumbling/cracking sound like distant thunder. Huh
It does it whether is connected to the amplifier/Coax or not. Its also independent of the amplifier volume and quite loud. So assuming its not an amp/cable issue.
I had a loud humming noise initially, but solved that by plugging the sub to the same power strip as the rest of the system (to make sure earth is the same).

The rest of my system is a Devialet 250, Atohm GT1 SE (sources Mac Mini and Rega P3)
Everything else is working fine.
Not sure what this can be.
Thanks
Brendan
Devialet 250 FW 9.0.1
Atohm GT SE1. Atacama stands
Sources:
1. Mac Mini 2011 (SSD 16GB RAM)- Devialet Air 3
Audioquest Forrest ethernet cables, local network on separate router
- Qobuz/Audirvana 2+/ Audirvana app on iPad (Via Mac mini)
2. 1999 Rega Planet CD - with replaced mechanism
3. 2016 Rega P3 Turntable with Exact cartridge

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#2
(23-Dec-2016, 10:38)DelaneyB Wrote: My Atohm V38s subwoofer has arrived, but I’m having a bit of a problem.
I wonder if anyone can help.
Its making a rumbling/cracking sound like distant thunder. Huh
It does it whether is connected to the amplifier/Coax or not. Its also independent of the amplifier volume and quite loud. So assuming its not an amp/cable issue.
I had a loud humming noise initially, but solved that by plugging the sub to the same power strip as the rest of the system (to make sure earth is the same).

The rest of my system is a Devialet 250, Atohm GT1 SE (sources Mac Mini and Rega P3)
Everything else is working fine.
Not sure what this can be.
Thanks
Brendan

Hi Brendan,
if nothing is connected to the sub, just the PC to the power strip, it is most likely that something is broken/loose inside the sub due to transport/fabrication.
Sorry but I think you have to send it back. Make a quick phone call to the dealer before to describe the issue though.

gui
- D200 (mod) - ML Motion40 (mod) - Manger P1 (mod) - foobar AO/jplay/process lasso/ssd/laptop(mod)/usb-D200 - 
"Oh, you can buy the other. But then it is a cost intensive learning process"
berlin
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#3
(23-Dec-2016, 11:08)yabaVR Wrote:
(23-Dec-2016, 10:38)DelaneyB Wrote: My Atohm V38s subwoofer has arrived, but I’m having a bit of a problem.
I wonder if anyone can help.
Its making a rumbling/cracking sound like distant thunder. Huh
It does it whether is connected to the amplifier/Coax or not. Its also independent of the amplifier volume and quite loud. So assuming its not an amp/cable issue.
I had a loud humming noise initially, but solved that by plugging the sub to the same power strip as the rest of the system (to make sure earth is the same).

The rest of my system is a Devialet 250, Atohm GT1 SE (sources Mac Mini and Rega P3)
Everything else is working fine.
Not sure what this can be.
Thanks
Brendan

Hi Brendan,
if nothing is connected to the sub, just the PC to the power strip, it is most likely that something is broken/loose inside the sub due to transport/fabrication.
Sorry but I think you have to send it back. Make a quick phone call to the dealer before to describe the issue though.

gui

Thanks,
Oh well, that will mean shipping it back to Italy from the UK in the New Year....
Sad
Devialet 250 FW 9.0.1
Atohm GT SE1. Atacama stands
Sources:
1. Mac Mini 2011 (SSD 16GB RAM)- Devialet Air 3
Audioquest Forrest ethernet cables, local network on separate router
- Qobuz/Audirvana 2+/ Audirvana app on iPad (Via Mac mini)
2. 1999 Rega Planet CD - with replaced mechanism
3. 2016 Rega P3 Turntable with Exact cartridge

Reply
#4
Very strange though.
I changed the mains cable to the original continental one (with an adaptor) and it went away for about an hour.
No its back, but a lot quieter. Just a varying 'rumbling' sound like a distant storm. Very audible when no music is playing.
Could it be something to do with the mains?
Devialet 250 FW 9.0.1
Atohm GT SE1. Atacama stands
Sources:
1. Mac Mini 2011 (SSD 16GB RAM)- Devialet Air 3
Audioquest Forrest ethernet cables, local network on separate router
- Qobuz/Audirvana 2+/ Audirvana app on iPad (Via Mac mini)
2. 1999 Rega Planet CD - with replaced mechanism
3. 2016 Rega P3 Turntable with Exact cartridge

Reply
#5
(23-Dec-2016, 18:25)DelaneyB Wrote: Very strange though.
I changed the mains cable to the original continental one (with an adaptor) and it went away for about an hour.
No its back, but a lot quieter. Just a varying 'rumbling' sound like a distant storm. Very audible when no music is playing.
Could it be something to do with the mains?

If you suspect a bad mains supply, listen to it in the early hours of the morning, when there is less draw on the mains and see what you hear. I mean hear what you hear. I mean....well you know what I mean!
Project Eperience X Pack with Ortofon Rondo Red MC, Oppo BDP 105D, Sonos Connect, QNAP HS251+ NAS running JRiver, Mutec MC-3+USB, Devialet 440 Pro, Denon AH-D5000, Sennheiser HD600 and HD800 with Cardas cable, Rupert Neve Designs headphone amp., Proac Response D20R, Van Den Hul The First Ultimate interconnects, GSP Audio Spatia speaker cable.
South Coast England
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#6
Some sort of Christmas lights mains pollution?
Air 3, Rega P9 with Dynavector XX2Mk2 > 440 Pro > Sonus Faber Guarneri Evolution
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#7
(23-Dec-2016, 18:25)DelaneyB Wrote: Very strange though.
I changed the mains cable to the original continental one (with an adaptor) and it went away for about an hour.
No its back, but a lot quieter. Just a varying 'rumbling' sound like a distant storm. Very audible when no music is playing.
Could it be something to do with the mains?

May be a loose mains connetion inside the sub at the IEC or on the mainboard. If you know how to do it you should open the unpowered back panel and have a look on the connections inside. It could be a very simple issue. Post a photo if you're not sure.

gui
- D200 (mod) - ML Motion40 (mod) - Manger P1 (mod) - foobar AO/jplay/process lasso/ssd/laptop(mod)/usb-D200 - 
"Oh, you can buy the other. But then it is a cost intensive learning process"
berlin
Reply
#8
Well the upstairs neighbours have vetoed it anyway. The extra bass goes straight into their flat even though its NOT loud.
Depressing....
Devialet 250 FW 9.0.1
Atohm GT SE1. Atacama stands
Sources:
1. Mac Mini 2011 (SSD 16GB RAM)- Devialet Air 3
Audioquest Forrest ethernet cables, local network on separate router
- Qobuz/Audirvana 2+/ Audirvana app on iPad (Via Mac mini)
2. 1999 Rega Planet CD - with replaced mechanism
3. 2016 Rega P3 Turntable with Exact cartridge

Reply
#9
(24-Dec-2016, 00:51)DelaneyB Wrote: Well the upstairs neighbours have vetoed it anyway. The extra bass goes straight into their flat even though its NOT loud.
Depressing....

Spoke to a very nice Mr Cont at Atohm today. suggested cleaning all the microswitches with switch cleaner. Sorted the problem.
Now waiting for my sorbthane feet.....
Devialet 250 FW 9.0.1
Atohm GT SE1. Atacama stands
Sources:
1. Mac Mini 2011 (SSD 16GB RAM)- Devialet Air 3
Audioquest Forrest ethernet cables, local network on separate router
- Qobuz/Audirvana 2+/ Audirvana app on iPad (Via Mac mini)
2. 1999 Rega Planet CD - with replaced mechanism
3. 2016 Rega P3 Turntable with Exact cartridge

Reply
#10
(11-Jan-2017, 00:06)DelaneyB Wrote: cleaning all the microswitches with switch cleaner. Sorted the problem.
Now waiting for my sorbthane feet.....

What are the 'microswitches'

Sorry to jump on your thread, but the problem I have is a 'heartbeat' sound I get from my Sub (Paradigm Sub1), any idea what would cause this?
1000Pro (Matte Black Pair), Lenehan Audio ML3 Reference's, FoilTek Speaker Cable's, Paradigm Sub1, Antipodes DS, Roon, Curious Cable USB, Violetric V200, Ultrasone Edition 8's, Stello U3, MIT Proline Reference AES, Mad Scientist Link Cable (RCA/AES) & PSC Power Cord's

Australia (Perth)
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