rb981's Buzzing

[JonLeach]

hi i wonder if anyone has experienced this problem, its not buzzing through the speakers, but the units themselves are buzzing. i have 2 bought secondhand and were setup as mono, i use them for center, and surround, i have a rb1080 doing stereo and thats fine, previosly i had a 985 mk2 which was also fine.


if they are used without any connections they still buzz.

i don't want to get rid of them as they sound very good, i could alwasys build a cupboard for them i suppose


Jon

[eelco74]

Hi,

I have owned a pair of 981's, and both of them are dead quiet. I stil have one of them for stereo, but no buzzing at all. I live in Europe, and power seems te be less troblesome overhere....

ave you compared the 1080 to the 981. Is the 1080 mutch better sounding ?

[JonLeach]

I am in europe, UK.

i have dedicated mains so i don't think thats the problem.

i wonder if attacking the case with blue tac would improve things.

IMO the 1080 has more detail and a tighter bottom end. you can really pickout every instrument even when the amps are really rocking. my only critism is that you have to crank it up a bit. for some reason i have the speakers sat on the 981's set to -6 after calibration. Weird.

[eelco74]

oops... I thought you lived in the US :-)

Have you tried to remove the amps from the rack, and remove the lid.
Be very carefull because of the electricity. I cannot inmagine where the hum could be coming from, since the amp does not contant that many parts. Normally the transormer can hum, but I can't see this becaulse Rotel uses very high quality ones.

The 1080 is quite a bit more expensive, so it should sound better....

[JonLeach]

yes your right, it should be better.

watched Alien last night late on, and had to have the volume quite low and all i could hear was the humming from those amps. i will definatly attack them with blue tac this weekend.

Jon