Background noise in floorstanders twitters

[dan25]

Hello all,

I've discovered today a background noise in my floorstandres twitters (it's a continuous fsssssss ). I have this sound even if I choose an receiver input where nothing is connected or the sound volume is off. If the sound volume is off then the background noise intensity decreases a little bit but it's there. Can somebody help? Tankx!

 

[TrevC]

Hello all,

I've discovered today a background noise in my floorstandres twitters (it's a continuous fsssssss ). I have this sound even if I choose an receiver input where nothing is connected or the sound volume is off. If the sound volume is off then the background noise intensity decreases a little bit but it's there. Can somebody help? Tankx!

Perfectly normal. All amplifiers generate a small amount of noise.

 

[RobinKidderminster]

Just checked my phono - no tweeter hiss here.

 

[TrevC]

Just checked my phono - no tweeter hiss here.

So you are either deaf or you have a very high quality amp!

 

[RobinKidderminster]

Volume set to medium listening level. Phono input (which surely attracts most noise?) but tweeters are silent. Great hearing no but not deaf hopefully. Hopefully others will do a quick check.

I was surprised since my deck has been prone to picking up interference in the past.

 

[TrevC]

Volume set to medium listening level. Phono input (which surely attracts most noise?) but tweeters are silent. Great hearing no but not deaf hopefully. Hopefully others will do a quick check.

I was surprised since my deck has been prone to picking up interference in the past.

That is an excellent result by any standards. A bit of hiss remains normal, however.

 

[Covenanter]

Volume set to medium listening level. Phono input (which surely attracts most noise?) but tweeters are silent. Great hearing no but not deaf hopefully. Hopefully others will do a quick check.

I was surprised since my deck has been prone to picking up interference in the past.

That is an excellent result by any standards. A bit of hiss remains normal, however.

Turned mine up to maximum and could hear nothing. Now my hearing is certainly declining but I am actually surprised that I heard nothing.

Chris

 

[nopiano]

With some gear you are more likely to get noise from unused inputs, I guess because they are wide open to random noise from other electrical equipment. What matters if any significant residual noise exists on inputs with sources attached. What is the situation there, Dan?

 

[dan25]

The hiss is present even if I use the reveiver integrated tuner or PS3 on sa/cd optical input.

If I select one of these inputs an turn the sound volume to minimum I hear the sound. The sound can be heard only if I am standing close to the speakers. I tried to unplug TV,PS3 in order to remove possible electrical interferences but the sound is still there.

 

[TrevC]

With some gear you are more likely to get noise from unused inputs, I guess because they are wide open to random noise from other electrical equipment. What matters if any significant residual noise exists on inputs with sources attached. What is the situation there, Dan?

You don't get noise from unused inputs. It's internal noise, from the electronics in the amplifier itself. Unless it can be heard from the listening seat it's of no consequence.

 

[matthewpiano]

With some gear you are more likely to get noise from unused inputs, I guess because they are wide open to random noise from other electrical equipment. What matters if any significant residual noise exists on inputs with sources attached. What is the situation there, Dan?

You don't get noise from unused inputs. It's internal noise, from the electronics in the amplifier itself. Unless it can be heard from the listening seat it's of no consequence.

Absolutely. Why spend your life with an ear to the tweeter leaking a tiny little bit of hiss, when you could be sat back in your seat listening to the music.

 

[plastic penguin]

Yup, all amps produce some sort of noise; it's when you hear a heavy buzz then it should be checked out.

 

[gasolin]

all active studio monitors does have hiss from the amp/tweeter, not all separate amd and speaker does.

http://www.gearslutz.com/board/so-much-gear-so-little-time/917370-quietest-active-monitors-hiss-etc.html

 

[matthewpiano]

All electronics produce noise to some extent. That is why the signal to noise ratio measurement exists.

 

[nopiano]

With some gear you are more likely to get noise from unused inputs, I guess because they are wide open to random noise from other electrical equipment. What matters if any significant residual noise exists on inputs with sources attached. What is the situation there, Dan?

You don't get noise from unused inputs. It's internal noise, from the electronics in the amplifier itself. Unless it can be heard from the listening seat it's of no consequence.

well you do in my experience, Trev. In my view av receivers aren't hifi but that is also irrelevant here. I agree with your last sentence.

 

[oldric_naubhoff]

Hello all,

I've discovered today a background noise in my floorstandres twitters (it's a continuous fsssssss ). I have this sound even if I choose an receiver input where nothing is connected or the sound volume is off. If the sound volume is off then the background noise intensity decreases a little bit but it's there.

others have already pointed correctly on the electronics within your audio chain to be the culprit. most likely (like 99% sure of that) the amp has very poor S/N ratio - means that either you've got a defective unit (doubt it) or the marketing dept went crazy tad too much with preparation of the spec sheet for your amp. I'd wager that the spec sheet would say something around 100dB on S/N ratio? as you've guessed at this level of SNR you won't hear a thing from your speakers. so if you can that clearly means your amp is nowhere near "black quiet" levels of SNR.

Can somebody help? Tankx!

the only remedy is to buy an amp which is truly quitet. I'd recomend the new amp from Benchmark Audio for truly state-of-the-art levels of SNR. other good choices would be Devialet or an amp based on Hypex or ICE Power modules. recently on this forum there was some Ghent Audio mentioned, which is basically an ICE Power amp module wrapped in some steel. at the asking price must be one of the best VFM on the marked for powering hi-fi speakers (I qualify my view only because you could get even better VFM in head-fi world).

 

[TrevC]

With some gear you are more likely to get noise from unused inputs, I guess because they are wide open to random noise from other electrical equipment. What matters if any significant residual noise exists on inputs with sources attached. What is the situation there, Dan?

You don't get noise from unused inputs. It's internal noise, from the electronics in the amplifier itself. Unless it can be heard from the listening seat it's of no consequence.

well you do in my experience, Trev.

You are mistaken.

 

[chebby]

1) All but the input selected will be switched out-of-circuit.

2) An unused input is automatically out-of-circuit by virtue of having no source equipment plugged in to complete a circuit. (And still out-of circuit until the source is actually switched on.)

How can you get noise from anything that is out-of-circuit?

 

[nopiano]

With some gear you are more likely to get noise from unused inputs, I guess because they are wide open to random noise from other electrical equipment. What matters if any significant residual noise exists on inputs with sources attached. What is the situation there, Dan?

You don't get noise from unused inputs. It's internal noise, from the electronics in the amplifier itself. Unless it can be heard from the listening seat it's of no consequence.

well you do in my experience, Trev.

You are mistaken.

Er, no I'm not.

 

[davedotco]

I always thought that s/n was measured with the selected input shorted........ :?

Generally, a high gain input such as a phono, would be noisier (hiss not hum) with the record player unplugged then with it plugged in, thus 'loading' the input.

That was always my understanding of the issue, seemed to be the case in practice too.

Or are we talking about something more specific, power amp noise for example......?

 

[CnoEvil]

With some gear you are more likely to get noise from unused inputs, I guess because they are wide open to random noise from other electrical equipment. What matters if any significant residual noise exists on inputs with sources attached. What is the situation there, Dan?

You don't get noise from unused inputs. It's internal noise, from the electronics in the amplifier itself. Unless it can be heard from the listening seat it's of no consequence.

well you do in my experience, Trev.

You are mistaken.

Er, no I'm not.

NP, don't worry about it. A good percentage of the forum are wrong about almost everything.....apparently. :twisted:

 

[nopiano]

NP, don't worry about it. A good percentage of the forum are wrong about almost everything.....apparently. :twisted:

Thanks, Cno, and as you've seen/found it is frustrating to be told your experience is not your experience! Especially when I try to help the poster (as you do) rather than contradict contributors!

 

[Jota180]

With some gear you are more likely to get noise from unused inputs, I guess because they are wide open to random noise from other electrical equipment. What matters if any significant residual noise exists on inputs with sources attached. What is the situation there, Dan?

You don't get noise from unused inputs. It's internal noise, from the electronics in the amplifier itself. Unless it can be heard from the listening seat it's of no consequence.

well you do in my experience, Trev.

You are mistaken.

Er, no I'm not.

NP, don't worry about it. A good percentage of the forum are wrong about almost everything.....apparently. :twisted:

Sorry, I'm 95% sure that is wrong.

 

[nopiano]

1) All but the input selected will be switched out-of-circuit.

2) An unused input is automatically out-of-circuit by virtue of having no source equipment plugged in to complete a circuit. (And still out-of circuit until the source is actually switched on.)

How can you get noise from anything that is out-of-circuit?

Hi Chebby, I think I may not have been precise enough. I was referring to an input selected but with nothing attached, which can generate noise until something is plugged it. It was my opening reply, and at that stage it was not clear what the OP was actually listening to. My experience is that users sometimes click through their inputs and hear noise on one (often the phono stage in hifi amps, unsurprisingly given their massive gain and eqaulisation).

I think we can probably conclude it is residual (white) noise that is of no consequence, unless it is burbling or otherwise variable, in which case something is needing repair.

 

[TrevC]

With some gear you are more likely to get noise from unused inputs, I guess because they are wide open to random noise from other electrical equipment. What matters if any significant residual noise exists on inputs with sources attached. What is the situation there, Dan?

You don't get noise from unused inputs. It's internal noise, from the electronics in the amplifier itself. Unless it can be heard from the listening seat it's of no consequence.

well you do in my experience, Trev.

You are mistaken.

Er, no I'm not.

Oh yes you are!