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Slowcoach's picture
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Roksan Caspian M2 integrated amplifier hum

I hope some fellow Caspian M2 owners might be able to offer some advice. I recently purchased this item as an upgrade to the Kandy III integrated amp. Sound is excellent but the hum from the transformer is bothering me. Its a steady hum, unaffected by isolating the unit or running it from the neighbours' mains supply. It is noticeable on entering the room and can be heard some 10 to 12 feet away. Is this normal? 

Roksan's technical department say this is not as it should be but having sent it to the supplier for testing/replacement it was simply returned with the note " Not fault found - hum with in normal levels (sic)".

If any forum members have this product I would really appreciate some opinions on what is 'normal' in terms of transformer hum from this or any other make for that matter.

Whilst the level of hum may be something I have to learn to live with, and possibly get used to switching off the mains supply when not in use, I am disappointed to find such an annoying tendency from what to me is a piece of fairly high end kit.

So if you can find a few minutes to put your ears to your amps it would be much appreciated.

 

Roksan Caspian M2 integrated amp>MF M1 DAC>Roksan Kandy III CD>Graham Slee HA>Leema Elements PS>RegaP7>Monitor Audio RS6

toyota man's picture
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RE: Roksan Caspian M2 integrated amplifier hum

Hi I had this problem with my m6i and I phoned musical fidelity who said mains noise was the problem I then phoned seven oaks who said bring it in they tightened the fixings on transformer which made a slight difference and the we comaired it to another amp they had in stock which was silent so they just gave me the new one and I love it:) Smile :) Smile :) Smile :) Smile :) Smile :) Smile so I would suggest that you take it back for a new one you have paid your money and goods not fit for purpose I KNOW HOW ANOYING IT CAN BE WHEN YOU CAN HEAR THE AMP ABOVE THE MUSIC good luck if your dealers any good you will be ok

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RE: Roksan Caspian M2 integrated amplifier hum

You wouldn't accept that in a product costing £200, even less so with an amplifier of that price.

 

Return to seller for an exchange or else ask for a refund and choose something that doesn't hum would be my advise. -

 

regards

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RE: Roksan Caspian M2 integrated amplifier hum

Hi,

Got mine running as I write and no noticeable hum.

I would take it back as suggested above and just get a replacement which doesn't hum.

Then just sit back and enjoy.

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RE: Roksan Caspian M2 integrated amplifier hum

Thanks for the replies so far. Common sense suggests that this is a fault and that the unit should be replaced. I may have to take it back again and refuse to leave without a replacement. But before having to do that some advice on whether any amount of hum from the unit is normal. If people are saying that no amount of noise should be coming from the unit at all then that's one thing. But if a faint hum is normal I may have to take a view on it.....

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RE: Roksan Caspian M2 integrated amplifier hum

Absolutely silent here. No hum at even full volume, apart from PC PSU burble, but that's not the amp. I'd take it back to the dealer and ask them to compare it to another one, in front of you. 

toyota man's picture
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RE: Roksan Caspian M2 integrated amplifier hum

SteveR750 wrote:

Absolutely silent here. No hum at even full volume, apart from PC PSU burble, but that's not the amp. I'd take it back to the dealer and ask them to compare it to another one, in front of you. 

+1 if you can hear the amp in your normal listening positionwhen no music is being played then its to noisy IMHO as SteveR750 says ask to listen to another unit side by side with yours  I hope it all works out for you £1650 is a lot of loot

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RE: Roksan Caspian M2 integrated amplifier hum

No hum from mine.

 

Take it back it sounds faulty.

 

Lee

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RE: Roksan Caspian M2 integrated amplifier hum

Absolutely no audible hum from mine either on or in standby. Unit is on glass shelf.

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RE: Roksan Caspian M2 integrated amplifier hum

I play mine at quite low levels late at night and I can't say I have ever heard any hum.On hifi rack glass shelves

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RE: Roksan Caspian M2 integrated amplifier hum

Here we go again... If ain't Rega then it is Roksan

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RE: Roksan Caspian M2 integrated amplifier hum

I sympathize. Have been in that situation before when there's a fault that's difficult to prove. Can be a lot of hassle but the hum should be a straight forward swap, no question.

My Kandy K2 CD player had to go back to Roksan for an LCD replacement which was an obvious fault.  A more tricky problem was the unit, on the rare occasion would ignore the odd remote command (both RMX-108 & 111). They said it was ' a very odd case' and the engineer could not replicate the fault. The IR receiver was replaced anyway.  It still does it and I'm convinced all Roksan Kandy K2 CD players have the same problem because it happened on another unit in Richer Sounds. 

Sorry to go off topic a bit.  Hopefully your dealer will just swap the unit for another. 

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RE: Roksan Caspian M2 integrated amplifier hum

drummerman wrote:

You wouldn't accept that in a product costing £200, even less so with an amplifier of that price.

 

Return to seller for an exchange or else ask for a refund and choose something that doesn't hum would be my advise. -

 

regards

+1 

I noticed using the remote the amp isn't as responsive as a digital receiver or a TV. All the selectors are relays and you can't click through them too fast, you need to hear the clicky sounds first. Also the motorized volume takes some time to get used to since it has a safety feature, it doesn't get suddenly loud if you hold it pushed (like when you accidentaly sit on it). You also have to aim at the amp to get the remote to send a signal. My Bang & Olufsen remotes could work 3 rooms away and were superbly responsive and made out of metal. (but very pricey)

B&W CM1 + FS-700/CM + Roksan Kandy K2 BT + Native Instruments TA2 + Commodore 64 LPSU + Audioquest Type 4

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RE: Roksan Caspian M2 integrated amplifier hum

Hi

This might be worth a try.

Hum can be generated from ground loops causes by different components connected to different supply sources (or electrical circuits).

Are all your components and equipment connected to the same electrical power circuit and hence the same common earth/ground?

This applies to all your electrical equipment in the vicinity and not just your hifi equipment.

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RE: Roksan Caspian M2 integrated amplifier hum

Hi

This might be worth a try.

Hum can be generated from ground loops causes by different components connected to different supply sources (or electrical circuits).

Are all your components and equipment connected to the same electrical power circuit and hence the same common earth/ground?

This applies to all your electrical equipment in the vicinity and not just your hifi equipment.

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RE: Roksan Caspian M2 integrated amplifier hum

NHL wrote:

Here we go again... If ain't Rega then it is Roksan

Yep. Any more for any more??. :doh:

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