noise ..noise..noise..

Hi AuGOners,
i am demoing a pair of mastersound 300B int amp with my avantgarde uno.i have no clue whats going on but when the volume is low or sound like rainning comming through my speakers.any one have any clue whats going on?
Sounds like power outlet,tubes or transformer noise by your description.Then again you might be hearing the difference in the preamp section's gain output relative to the amplifier's input sensitivity of the integrate.

In layman terms it's like having a preamp with too much gain for the amplifier.You get that background hiss in the music.With the volume turned all the way down it is very noticeable.
try turning your amp power down slightly to compensate for the higher input power and if that doesn't work try disconnecting your cable for your tv because if your ground in your home is bad your system will ground itself through the cable. I had this same issue and both of these solutions worked well for me
I hope they help you Greg
Maybe the amps just have a little too much noise for your very efficient speaker system.
With speakers like that, you need a very quiet amplifier.
With most other speakers, the noise might be buried and you wouldn't hear it.
thanks guy. i try using it as a direct amp with the pre-amp-no change... try it as an int amp-no change..i try disconnect all interconnect-no change.

TWL. this am supposely 11W/chanel and it should work fine with the uno,cuz i used a 22w int with my uno and it is dead quiet.
The watts have nothing to do with how quiet an amplfier is.
Some are just noisy no matter what you do.Especially on highly sensitive speakers like yours. I would really consider a battery based amplifier for that type of speaker.
It just doesn't get much quieter than a battery based power supply.
this is to adress the statement that Gmood1 posted wattage of an amplifier does not directly affect how quiet an amplifier is but common sense tells you that if there is a slight noise (hum, buzz, ect.) at lower volume levels that when you increase the signal strength (ie. crank the volume) the signal(that buzz, hum) increases in volume. And to further elaborate on his posting amps usually are not noisy unless they are hooked up improperly, are hooked up with subpar cables and interconnects, or there are wiring issues with your place of establishment (as I stated before possibly a bad ground) A battery power source would be a way to isolate the system but there are more effective ways to do this like an A/C line conditioner. One can be picked up relatively inexpensively. I hope you get the buzz out of your system Greg
FWIW TWL and Gmood1's comments seem to be nearly on point....

However I cannot tell exactly what you is doing with this integrated unit when you say "I try using it as a direct amp.....try it as an int amp"..... Could you elaborate for me. Are you saying that you disconnected the amp section from the preamp section and drove the amp section with a source that had its own volume control?

Assuming that it is being used as it was intended, that is the pre-amplifier section connected to the amplifier section, what you are hearing is the residual noise level of the pre-amplifier section or the pre-amp section tubes. It doesn't make any difference whether or not the volume control is minimal or maximum as the VC preceeds the pre-amp output to the amp, in other words its out put is steady at all times. With very efficient speakers you will usually hear some hiss, especially when your ear is near the speaker. Power tubes generally do not hiss and the power section of the amp (or a seperate power amp) should be hiss/hum less under optimal circumstances.

If its a big deal for your sonically, you might try replacing the pre amp or driver tubes with some very quiet low noise tubes. It might help.
Greg doesn't matter what line conditioner you buy. It will never be as quiet as a battery based power supply.
Apparently you haven't owned a very sensitive speaker. Some AC power based amplifiers have more noise than others but most do have some noise.You can put $5000 worth of cables on a big ass tube amp or SS with massive transformers on it. Hook it to a pair of 102 db sensitive speakers,and prepare to enjoy some soothing white noise or hum! The only AC power based amplifiers I've heard that are dead quiet use a muting circuit when no signal is present.This doesn't make them hiss/hum free when the musics playing though.
okie guys, i ve been going crazy with this hiss problem the past few days,yesterday i just try using the BAT vk5i pre with the amp,and now it is dead silence and sound fantastic.i just cant figure it out.the amp alone is noisy,amp plus my pre-amp doesnt change anything,still noisy,but with the BAT pre-amp(loaner) is dead silence.what is it about this bat pre-amp that can cure the problem..i am hopping if i can fix this problem without purchasing another pre-amp.thanks

1...While the power capability (watts) of the amp has no direct relationship to its noise level, it does affect how the noise level is spec'd. Noise is spec'd relative to full power output. So a 60 watt amp rated at -100dB will be quieter at idle than a 600 watt amp with the same noise spec.

2...An AC powered dc supply can be as quiet as the designer cares to make it. And battery voltage has some noise on it when you draw current. The chemicals are "cooking off" to release the electrons. However, in practice battery power is a foolproof approach if the device doesn't require much power.

The noise generated by an ac supply is easily evaluated. Just pull the plug so the amp is running on the capacitors and see if the noise level changes. Make sure that you aren't hearing ground loop hum.
Would the Granite Audio ground zero device help here? Its the only component of its kind I am aware of, seems pretty flexible. If I ever freak about my systems background noise I'd probably try it.
have you had any problems with the bass bottoming out? How about the bass amps clipping? bob