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IVS Forums->General: General Home Theater Discussion Page: 1 2  Previous   Next
Hiss In Speakers (Locked)
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abrg923
Giggity giggity!
Registered: October 12, 2004
Posts: 2,805
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To start with, I'm a newbie to this stuff - just got my system four days ago. The system is this.

Whenever there is no noise in a movie or in a videogame (I have my XBox hooked up to it as well), I hear a loud hissing sound coming from the speakers.

Any ideas what could cause this? Is this normal?
Ross

"All is silent in the halls of the dead. All is forgotten in the stone halls of the dead. Behold the stairways which stand in darkness; behold the rooms of ruin. These are the halls of the dead where the spiders spin and the great circuits fall quiet, one by one."
darkrain
Ex-blade runner
Registered: May 10, 2004
Posts: 184
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You should hear some hiss if the volume is turned up all the way. But at normal listening volume you shouldn't. I'd check your speaker wiring and make sure every thing is connected securely. Take it back if the problem persists.

BTW, get some better speaker wire rather than using the cheap stuff that came with it. Also invest in a better subwoofer cable. It makes a difference in sound quality.
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skipnet50
It all began with a mouse
Registered: October 4, 2000
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Have you looked for a snake Abrg, couldn't resist.

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abrg923
Giggity giggity!
Registered: October 12, 2004
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That's almost completely unfunny...my neighbor had a rattlesnake crawl onto his porch just a few days ago - which is extremely uncommon in Indiana. So don't say that!

Darkrain - is there a brand of speaker wire and sub cable you recommend?
Ross

"All is silent in the halls of the dead. All is forgotten in the stone halls of the dead. Behold the stairways which stand in darkness; behold the rooms of ruin. These are the halls of the dead where the spiders spin and the great circuits fall quiet, one by one."
skipnet50
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Monster Cable is a good choice.

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Ukexpat
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Registered: October 30, 2000
Posts: 1,927
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Quoting skipnet50:
Quote:
Monster Cable is a good choice.

Skip


But don't waste your money on the mega-buck stuff...
Dan W
DVD_Mad_Man
Registered: May 9, 2002
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Quoting Ukexpat:
Quote:
Quoting skipnet50:
Quote:
Monster Cable is a good choice.

Skip


But don't waste your money on the mega-buck stuff...

Ditto that!!!

If the speaker cable has a box on it, something is being filtered. Like: all of the high frequencies.
Dan W

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jgraber
Registered: January 27, 2005
Posts: 17
Posted:
This may be the wrong thing to say, but HTIB (Home Theater in a Box) is definately not going to give you anything close to great sound. Many HTIB are basically designed to make noise from six places in your room so you'll feel like you have surround sound.

I always recommend www.orbaudio.com. They've got a package deal you can get that will probably sound better than any HTIB on the market.

Having said that, see if you can find where the hiss is coming from. Is it one speaker or all of them?
- If it's one, it's that speaker or its wiring. If it's all, see below.

Does changing the volume level matter?
- If it does, it's noise on the amp and you'll probably have to take it back.

Does it have an automatic "power-save" mode?
- If it does, I've heard some units that hum or hiss until the power save shuts it down.

Hope that's helpful.
abrg923
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Registered: October 12, 2004
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It comes from all the speakers, and changing the volume doesn't matter - putting it on mute doesn't even reduce the hiss. There's no auto-power save, either. I'm pretty baffled by the whole thing.
Ross

"All is silent in the halls of the dead. All is forgotten in the stone halls of the dead. Behold the stairways which stand in darkness; behold the rooms of ruin. These are the halls of the dead where the spiders spin and the great circuits fall quiet, one by one."
jgraber
Registered: January 27, 2005
Posts: 17
Posted:
I'm really not sure, here, but I once heard someone say this can be due to poor grounding or noisy (inconsistent) power supply from the wall.

If that's actually true, I dont' know how you'd resolve it.
Halo2
A tech with attitude
Registered: October 19, 2002
Posts: 160
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Check your cables to the speakers (if you haven't replaced them yet), make sure they are secure on both ends, make sure they aren't crossed (red-positive, black-negative on one end and the opposite on the other) and check the whole length of each cable for any cuts, nick or other breaks that could allow shorting or a breakdown in the shielding that would induce noise. Also consider using a ups to plug into for power. Not a surge protector, but a ups with a battery in it. That will give you clean AC going into the system. Not an "expert" on HTIB, just had to deal with power problems in some of the places I've lived and did a lot of aircraft electronics work involving a lot of wiring problems. May be totally wrong, but it's where I'd start.
cchur
Registered: December 17, 2004
Posts: 2
Posted:
Try looking at each of the speaker wires to see that they don't follow any AC wires.  If you have to cross an AC line, do it at right angles that way less induction into the speaker wire.  Also, look at what is on the same breaker, air conditioners, florescent lights, computers etc can cause problems.  My thought is that your noise is coming from noise on the AC line.  There are some good line filtering devices for your AC line.  Try 'em.
abrg923
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Registered: October 12, 2004
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Sorry, I'm a complete newb at this...what are AC wires? And what do you mean by crossing them?
Ross

"All is silent in the halls of the dead. All is forgotten in the stone halls of the dead. Behold the stairways which stand in darkness; behold the rooms of ruin. These are the halls of the dead where the spiders spin and the great circuits fall quiet, one by one."
 Last edited: by abrg923
Halo2
A tech with attitude
Registered: October 19, 2002
Posts: 160
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What cchur is refering to by AC wires is any power cable from a wall outlet to a device. Much like a fan or other AC motor near your monitor can cause a wavy display due to induction, your speaker wires can pick up AC noise if they are laying beside any power cables. This noise is transmitted to the speakers and comes out as hiss. What he means by crossing them is, if you do have the speaker and any power cables that run side by side, move them apart and if you do need to run one across the other, do it like a "T" to minimize the contact of the speaker and power cables. Hope this helps.
Boomer1111
Registered: October 27, 2005
Posts: 11
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Quoting skipnet50:
Quote:
Monster Cable is a good choice.

Skip



AHHHHH!!

Monster cable is over priced and not worth the money at all. They don't even list the spec's on the cable, like capacitance, impedance tolerances, center conductor size, and a few others. Speaker cables don't really matter at all. The only thing you sould need to worry about in speaker cable is the gauge. The link to the HTIAB is not working at the moment, but it probably came with 22 or (at the most) 16 gauge. If it came with 16 gauge or you got some 14 or 12 gauge, then that would rule out the speaker cable. The other possible cause would depend on if you are getting the noise when watching a DVD or on everything, and if the DVD is part of the home theater receiver. If it's not, it could possibly be the cable that goes to the receiver, depending on if you are using the digital out or not.

As for the power cable, no. There could be some noise coming from the wall outlet, and that can be fixed with a line conditioner. You can get a great one from TripLite that will work great and not cost $400.

ALL of the cables that I use are from Blue Jeans Cable. Cheap, all the stuff is the same as whats used in the Broadcast industry and in recording studios, all Belden and Canare cable. Very nice stuff.


Hope that helps!
feedbox
Registered: January 26, 2002
Posts: 55
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maybe try adjusting the left and right levels on your TV this will tell you witch speaker is acting up I had the same problem on my set the RCAs where loose
Lord help me to be the person my Dog thinks I am

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IVS Forums->General: General Home Theater Discussion Page: 1 2  Previous   Next