Does Leema or Cyrus amps hum or buzz?

NHL

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Nov 12, 2009
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Does Leema or Cyrus amps hum or buzz?

I have a hunch that neither does.
 

Deliriumbassist

Well-known member
Apr 27, 2011
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My Cyrus 6a buzzed once. It also made a noise when changing the volume (almost like a beep on every step in volume it changed). Turned it off, unplugged it, set it back up again, not a problem since.
 

Vladimir

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Dec 26, 2013
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Also depends on the quality of the mains. I recently moved in a house where the mains chucks out 237V and at times up to 242V. The Roksan's transformer hummed instantly when plugged. I used a 1000VA voltage stabilizer and now with clean 230V the Roksan is silent.
 

chebby

Well-known member
Jun 2, 2008
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A flat we lived in for a couple of years until 1985 had 'quiet mains' until about 11:30 PM on weeknights (and on Sundays) at which time a large bakery down the road would start work for the night and we'd start getting occasional 'glitches' (short and quiet zzzp sounds* like you'd get from an old fridge wth no suppressor) and the amp would start humming quietly. This would persist until about 5 AM so it was never a real problem. During our time there the bakery closed down and it stopped.

The house we've been in since then has never had any mains issues. Even reputedly hum prone amps, like my old Rega Brio ('clamshell' version from 1996 - 2007) and my Nait 5i, never suffered at all. (Even when listening very closely with the volume turned right down.)

Whether you get a 'noisy' mains supply seems to be a bit of a lottery and whether your amplifier will cope with it is even more of a lottery.

*I remember buying an MK mains plug (fitted with a VDR) from my hi-fi dealer and fitted that to the 4-gang MK extension I used at the time for the system. It did reduce the volume and intensity of the 'zzzp' noises but the bakery closure had the greatest effect. (Sadly for the lost jobs that resulted.)
 

NHL

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Nov 12, 2009
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Great then! Seems to be the ideal marriage of British sound with Japanese attention to detail.
 

bigfish786

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Jan 29, 2013
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is this now leading to the ultimate upgrade? buying an acoustically neutral house and high-end power supply? are houses directional? or do they all sound the same? i must remember to upgrade my solar panels once Naim stock them.
 

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