a hiss/air sound Problem with my Yammy RXV650???!!!

[CosmicOne]

i have a problem with my RXV650,when i turn the volume very high (from 0db to the max) i hear a very loud hiss/air sound(i don't know what to call it),the hiss/air sound is there even if the player is not connected to any source atall,also in Pure Direct Mode,& it's very loud in any 5channel mode,the hiss/air sound is played all the time(i knew that by putting my ear on the twetters on my speakers so i hear it even in very low volumes) but it gets very very loud from 0db to max volume??

so any suggestions on that or any guys that have a 650/750 experinced the same????

 

[Unregistered]

I also have the Yamaha 650. However, I do not have that problem when set to 0db or higher. Sounds like your problem might be with your speakers or cables.

 

[CosmicOne]

when i use my old amp (a budget KenWood reciver) it doesn't do that at all with the same speakers & cables.

please if u can check this for me dude,choose any input & don't play anysource & set the program to DolbyProLogicII & raise the volume very high & see if u get this or not,but u must be in a quite enviroment.

thanx dude for ur help.

 

[Az B]

That noise is not unusual for recievers with all the surround sound decoders in them. They cause some hiss. Seperates will help a little. Cables won't help at all. Replacing speakers will only make a difference if you replace them with less sensitive speakers, which will simply require you to turn it up louder and you'll end up with the hiss again. But you won't hear it as much at lower levels.

 

[Polkfan]

Do you hear it at normal listening levels?

 

[warnerwh]

Some electronic noise is inevitable even in the very expensive equipment. I can turn up my separates which cost significantly and there's some electronic noise I can hear if I put my ear up to the speakers. If you can hear it from a foot away and the volume is where you listen to it then it may be that something is amiss but it's doubtful judging by your description, just normal especially for a receiver.

 

[CosmicOne]

Thanx guys for help,

no i don't hear it in my seting position using my normal levels of volume(from -20db to -10db),but from 0db to max volume it's very loud even if u r a feet away from the speakers.

 

[Polkfan]

Sounds like a noisy preamp. It is not common in all receivers actually, only some. Read this link from AH:

http://www.audioholics.com/techtips/buyingguides/avhardware/receivers.php#what_matters

I quote it here:

" Many mid to low priced receivers packed with features, nice lights and cool face plates suffer from a common problem, terrible preamp/processor sections. This can easily be ascertained by asking the salesperson to leave the showroom for a few minutes so you can be alone with the receiver to get to know it better. At this point, the room is quite silent, hopefully. Switch the receiver onto a 5 channel mode with no source running. Turn the volume control up about half way and balance all channels using the test tone. Now walk around the room and listen for airplane noises. Assuming you are not near an airport, you should not hear any. If you do, than this is a good indication that the receiver has a noisy preamp section. In a seated position midway between all speakers, listen for excessive background noise. Usually the rear channels are most obvious. If you can clearly hear hissing or white noise from any speaker while seated, than avoid this receiver as it will annoy you in the long run when playing 5 channel sources. If the receiver passed the noise test, move on to quality of the DAC's and ADC's. You should compare the fidelity of sound of the internal DAC's with that of the CD/DVD player you are using in your system. When switching from analog to digital inputs on the receiver, you should notice similar or better fidelity. If you don't this may imply the DAC's in the receiver are not as good as the ones in your CD/DVD player. This may present a problem to those who enjoy listening to DSP modes or want to really reproduce excellent 5 channel DD/DTS surround. If the DAC's in the receiver are weak than you may have to rely on the DAC's in the CD player while listening to music in DSP modes. Doing this would involve a D/A conversion from your CD player to a A/D conversion in your DSP processor and finally a D/A conversion before the signal gets amplified. This process will manipulate the source 3 times as opposed to one. This should be avoided if possible as it will result in loss of fidelity."

 

[Unregistered]

when i use my old amp (a budget KenWood reciver) it doesn't do that at all with the same speakers & cables.

please if u can check this for me dude,choose any input & don't play anysource & set the program to DolbyProLogicII & raise the volume very high & see if u get this or not,but u must be in a quite enviroment.

thanx dude for ur help.

I am not at home right now. I saw that you posted the same question on my thread about the volume difference between DVD and radio. I will check it out for you now that I have a better idea of the situation. For the record, have you tried your speakers with an input in yet? If you here the hiss when playing something, then I would be very concerned. But, I will check it for you later today and get back to you.

 

[Kesomir]

just checked my 650 for you - don't get anything like you describe even when turned up to max on a not-in-use channel.

 

[Unregistered]

Just came home

Hey CosmicOne I came home and checked into that for you.

When I took out all inputs (Satellite and DVD) and maxed out the volume, I did hear a hiss. Now, this is probably due to the preamp as the above article states. I personally have never had a receiver that DIDNT do this.

Once you connect an input and play it that is where the hiss is important. Just to double check I put in my girlfriends DVD Erin Brockavich in because

1) My DVD player provides the most clarity (I dont have HDTV)

2) Her DVD"s have aof the lack of explosions. I wanted to check it with just pure dialog.

I did not hear a hiss when being played. If it bugs you I say return it. But, if this is the only problem is when you have nothing plugged into it i say forget it.

Who wants to listen to thier receiver with nothing coming out of it anyway?

 

[CosmicOne]

Thanx dude very very much for doing this for me.
New info for all of u guys:

a dear friend of mine (YamahaLuver) if u know him he posts on this forums was trying to help me & he said he suspects the Electric line in my house while he mentioned that his Yammy Z9 does that hiss too,
so i was inspecting that & i did try different electric sockets in differnent places in the house & the hiss was there every time.
BUT i did something else,i tried another amps (my old KenWood Reciver,an Onkyo stereo amplifier not old but only gives 35w but with very very good quality it matched my 110W kenWood in terms of power)& to my surprise they all gave the same hiss/air/noise & louder than the Yamaha,So i think it's normal for all the amps/recivers to do that and/or it's my Electric line that's not so clean & i can't do anything about it.

 

[CosmicOne]

i forget to mention that frankly it doesn't do any harm coz i don't listen at those levels by anyway but it was bothering me to think that my amp is damaged or broken i also have a gurantee & can return it back to be fixed but after what i read i think it has nothing to be fixed.

 

[Polkfan]

'Tis irelevant if you don't hear it at normal listening level. Cheers!