Snap, crackle pop in speakers??

[Redbone]

Ever since I added my Hsu VTF2 subwoofer to my system I am constantly getting a crackle and pop in the speakers which last for a Nano second almost sounds like static from a dirty record. Also when someone uses a small appliance or vacum the noise is constant in the speakers. I have an NAD T753 reciever that is said to be notorious for this type of ground Loop problem I am told. From the advice on this board I installed a two prong cheater plug into the NAD three prong plug which has done nothing to correct the problem.

All other components have two prong polarized plugs. This problem was not around before I installed the sub a month or so back. So please don't as me to trace all the components in my system I know the sub is creating a ground loop.

Anyone know how I can fix this problem?? It is driving me crazy....

[Mr.T]

Get yourself one of these, if you don't have one:
http://www.shopping.com/xPO-Monster_cable_Monster_POWERBAR_1100_MPB_1100

Mr.T

[mtrycrafts]

Ever since I added my Hsu VTF2 subwoofer to my system I am constantly getting a crackle and pop in the speakers which last for a Nano second almost sounds like static from a dirty record. Also when someone uses a small appliance or vacum the noise is constant in the speakers. I have an NAD T753 reciever that is said to be notorious for this type of ground Loop problem I am told. From the advice on this board I installed a two prong cheater plug into the NAD three prong plug which has done nothing to correct the problem.

All other components have two prong polarized plugs. This problem was not around before I installed the sub a month or so back. So please don't as me to trace all the components in my system I know the sub is creating a ground loop.

Anyone know how I can fix this problem?? It is driving me crazy....

Somone had this problem about 2 weeks ago here. I bet one of the power cable is 2 prongs and some are 3 prongs, right? You have a ground fault problem. You may have to put a cheater plug on that 3 prong plug. Try that first.

[Redbone]

Yes, Mr. Crafts I believe I was the guy with the problem. NAD has three prongs all other components have two. Purchased cheater plug at Home depot and nothing happend. Sounds still coming out of speakers.

I also have two monster power bars one for the sub and one for the receiver, TV, DVD etc.... They are not as nice as the one you show only about $100 for the bigger one, stage 1. Would a bigger one really help or not?

I dont know what to do next? I know there is noise in the speakers every time an appliance or furnace or something electrical pops on- so annoying.

[Mr.T]

OK, obviously you're getting electrical interferences, your HT system seems to be in line with other applaiances in the house. Funny, usually a power bar surge suppressor should help suppress electrical interferences.

I beleive your next step should be to get a dedicated AC line from the circuit breaker box to your HT system, unless your handy, you might want to call an electrician and have that done. I can't think of anything else that would help your situation.

[Redbone]

T I live in a rented house I really don't want to spend money on someone else's place. The noise wasn't there before I installed the sub.

[mtrycrafts]

T I live in a rented house I really don't want to spend money on someone else's place. The noise wasn't there before I installed the sub.


But, you can check out if this would help by an extension cord and plug it into a kitchen outlet. That will be on a separate circuit breaker for sure. If it work, let us know and maybe you can do something about this.

Another solution may be a filter right at the appliance that causes the problems? Your powerbar can be moved temporarily and see.

I forgot, is the noise in all the speakers or only in the sub?

[Redbone]

Noise comes through just the speakers and became present when the sub was installed. Like I said it is not constant, just a pop or crackle for a split second, maybe when an appliance fan kicks on or something. The kitchen is across the way and uses separate outlets, when you run a food processor or blender the speakers pick up that noise for however long the appliance is in use.

It is very frustrating sitting there watching a movie and hear an annoying pop or crackle similar to a dirty record. Just a split second crackle. Though when it happens it usually happens every minute or so, which can drive one crazy.

I am kind of sold on line noise, If I upgraded my Monster Power strip to a better one would that help? I only have a stage 1 at the present.

Please help before I go insane-

[mtrycrafts]

Noise comes through just the speakers and became present when the sub was installed. Like I said it is not constant, just a pop or crackle for a split second, maybe when an appliance fan kicks on or something. The kitchen is across the way and uses separate outlets, when you run a food processor or blender the speakers pick up that noise for however long the appliance is in use.

It is very frustrating sitting there watching a movie and hear an annoying pop or crackle similar to a dirty record. Just a split second crackle. Though when it happens it usually happens every minute or so, which can drive one crazy.

I am kind of sold on line noise, If I upgraded my Monster Power strip to a better one would that help? I only have a stage 1 at the present.

Please help before I go insane-

I don't think the power strip will help.

Is it an old house? I had a person with problems and it came down to the neutral power cable to the house was almost non existant, causing problems. Forgot if it was at the meter or the pole.
You may need to have that checked how good the connections are and the wire itself.

What happens, you may have said before, if you only unplug the interconnect to the sub but not the power? Does the noise go away if you unplug the sub?

[Redbone]

Noise goes away when I disconnect the RCA cable from the A/V receiver. The house I live in is about 10 years old and I don't think they skimped on the wiring as all other building materials are top notch Anderson windows, Solid Oak flooring etc....

After disconecting the sub last night the whole system sounded cleaner which seems bizar to me. Trying to work this out with Dr. Hsu but we cannot figure out what the problem is. We know it is definately the sub, becasue without it the system works properly.

I never had this issue with my old H/K AVR520 and Paradigm PDR-10?? Have heard others having this problem with the newer NAD receivers but not sure.

[mtrycrafts]

Noise goes away when I disconnect the RCA cable from the A/V receiver. The house I live in is about 10 years old and I don't think they skimped on the wiring as all other building materials are top notch Anderson windows, Solid Oak flooring etc....

After disconecting the sub last night the whole system sounded cleaner which seems bizar to me. Trying to work this out with Dr. Hsu but we cannot figure out what the problem is. We know it is definately the sub, becasue without it the system works properly.

I never had this issue with my old H/K AVR520 and Paradigm PDR-10?? Have heard others having this problem with the newer NAD receivers but not sure.


You may need to just get a different sub. If Dr. Hsu cannot figure it out, I am just not sure what the answer other than another sub. Try a SVS :D

[Redbone]

I think it might be line noise,as the kid at the local hi fi store told me he had the same problem with pop and crackle when his refrigerator fan kicked on or water heater etc.. Trying to figure out if a better line conditioner would help??

[mtrycrafts]

I think it might be line noise,as the kid at the local hi fi store told me he had the same problem with pop and crackle when his refrigerator fan kicked on or water heater etc.. Trying to figure out if a better line conditioner would help??


But why does if happen only when you add the Hsu sub?
You can always try a better conditioner if you get a return policy without restocking fees attached as some go as high as 25%.

[forumtroll]

Power lines in the US run at 60 Hz the same as the human body...which is why even a small amount of voltage can cause great harm--it interrupts the electrical system in our bodies.

The THX crossover is set an 80 Hz. 60Hz<80Hz which is why the noise affects the sub. There are system which set the crossover as high as 120 Hz

[Redbone]

Mycrafts I believe it happens all the time, thinking back I guess I adjusted the whole system properly by setting reference level this included raising all speakers by 6dB which made the speakers more audible thus making the sound more audible.

With that said I believe I need a line conditioner but I have heard that the Monster Power strip ones compress sound stage and lower amp power is this true??

[mtrycrafts]

Power lines in the US run at 60 Hz the same as the human body..

Huh???



.which is why even a small amount of voltage can cause great harm--

Current has nothing to do with it? Human body resistance has nothing to do with the amount of voltage needed?




The THX crossover is set an 80 Hz. 60Hz<80Hz which is why the noise affects the sub.

Huh???
Where did you get this from???


There are system which set the crossover as high as 120 Hz


Poor idea as then you can localize the 120Hz . Very bad idea.

[mtrycrafts]

With that said I believe I need a line conditioner but I have heard that the Monster Power strip ones compress sound stage and lower amp power is this true??


I am surprized no one else chimed in to offer help. I am at a loss without on site troubleshooting at least.
Make sure you can get a full refund on the power strip if it doesn't do anything better for you.
Remember that audio is full of voodoo, affecting soundstage and lower amp power is among them :D
I would advise you to level match the speakers to the right level:)

[Redbone]

I'm confused when you say level match?

[MDS]

Level matching means using an SPL meter and the receiver's test tones (or a calibration disc, like AVIA or DVE) to adjust the level of each speaker to be the same.

[Redbone]

I did that a long time ago with the DVE disc and Hsu test warble tones. :D I do however want the most out of my receiver and will not stand for a power strip that condenses and lessens the amps output.

[mtrycrafts]

I do however want the most out of my receiver and will not stand for a power strip that condenses and lessens the amps output.

They don't. Yet another audio voodoo, urban mythology. Pls put this 6 ft underground for good. :rolleyes:

[Redbone]

Have you checked the reviews on audioreview Mycrafts??? Is this really voodoo?

[mtrycrafts]

Have you checked the reviews on audioreview Mycrafts??? Is this really voodoo?

Oh, you get your info from a review, from other audiophiles? I suppose they are unbiased and well grounded in science?
I am a bit more carefull where I get my info from. ;) I guess I am a lot more carefull :D

[Redbone]

By reading reveiws I have done very well in choosing my equipment and vise versa, the equipment I think is really great has gotten great reviews. :eek:

[mtrycrafts]

By reading reveiws I have done very well in choosing my equipment and vise versa, the equipment I think is really great has gotten great reviews. :eek:


Just be careful with those equipment reviews too ;)
But it is more difficult to find bad equipment than voodoo recommendations :D