Quietline filters by Audioprism

[malloy]

I have three of these. http://www.audioprism.com/quietline.html


Anyone use them and know what is in them/how they work?


The only thing they seem to do is make the sound brighter. I removed them.

Paul

[BobM]

They are fundamentally just an X or Y capacitor across the AC line, from + to -. I think there could also be a resistor in there as well. They shunt AC noise on the line to ground, giving you a cleaner electrical signal for any other component plugged into that same outlet. Great if you have light dimmers in the room or some other surge or noisy appliance on the same AC line.

If your system got brighter it's because you were hearing AC noise before.

[Nick B]

Paul,

I used a number of them many years ago….probably 6-8… and they made things sound less harsh. Got rid of them as they used up too many outlets.

[rollo]

  Do not use in system. Use at appliance outlets such as Refrig, Boiler, AC, etc.

charles

[Triode Pete]

They are fundamentally just an X or Y capacitor across the AC line, from + to -. I think there could also be a resistor in there as well. They shunt AC noise on the line to ground, giving you a cleaner electrical signal for any other component plugged into that same outlet. Great if you have light dimmers in the room or some other surge or noisy appliance on the same AC line.

If your system got brighter it's because you were hearing AC noise before.

They're effective at removing high frequency noise or signals. I had trouble initially setting up TP Link AC Powerline Ethernet Adapter. The TP Link basically sends digital data over my 120V 60Hz AC lines (into my Innuos Music server). It transforms my home's existing electrical circuit into a high-speed network with no need for new wires or drilling and brings wired network to anywhere there is a power outlet... Pretty cool!

However, I had a Quietline filter plugged into the same circuit as the TP Link and it "filtered" the digital signal... Removed it & all worked! LOL!

Cheers,
Pete

[malloy]

Thanks to everyone for your insights.

I have 7 LED light sources near the stereo, 2 have dimmers. Will try them there.

Paul

[Nick B]

Thanks to everyone for your insights.

I have 7 LED light sources near the stereo, 2 have dimmers. Will try them there.

Paul

Yes, dimmers can be noisy, but the worst was when I’d forget to turn off the lights in the garage. Pls let us know your results.
Nick

[BobM]

I put on where the refrigerator was plugged in, another on the washing machine. I think putting them at the potential source of noise might be better than on the system outlet.

[P.I.]

 

I put on where the refrigerator was plugged in, another on the washing machine. I think putting them at the potential source of noise might be better than on the system outlet.

[tmazz]

I put on where the refrigerator was plugged in, another on the washing machine. I think putting them at the potential source of noise might be better than on the system outlet.

Good idea Bob. I have a few of them in my stereo junk draw that have been supplanted by other stuff in my system. I never really thought about using them in other parts of the house.

I will have to give that a try.

[P.I.]

I put on where the refrigerator was plugged in, another on the washing machine. I think putting them at the potential source of noise might be better than on the system outlet.

Good idea Bob. I have a few of them in my stereo junk draw that have been supplanted by other stuff in my system. I never really thought about using them in other parts of the house.

I will have to give that a try.

Don't forget to use them on the phase opposite the one your system is on.  Remember:  the Neutral is common to both phases. Load to Neutral noise contamination is common to both.  Applying a QuietLine or other Load to Neutral device is always best placed at the same point as the offender.

Offenders:

Wall warts
Refrigerator
Freezer
Dimmer
Computer
TV
Cable or satellite receiver
Digital clocks
Tool chargers - they are some of the worst
Surveillance cameras
Any lamp with an LED or fluorescent bulb.  Better yet, throw those MFers away! A couple of bucks a month is a small price to pay!

Again, if you are capable and confident to do do, go around the house once a year and tighten the screws on every receptacle and switch.  Oxidation = RFI due to micro-arcing.

Clean every plug in the house and treat with a good contact enhancer.

[sidebar: clean all of your interconnects and speaker connections regularly.  This is particularly important if you are a smoker.  Electrical connections have an affinity for smokey ions]

Do those last three things one room at a time, say every week or month to make it not a drudgery...

You will be amazed at the improvement in SQ due to noise reduction, especially in the in the context of space, depth and width of soundstage.

Again: everything effects (and affects) everything.

[BobM]

If you get a few .1uF X or Y rated caps and plug them into your outlet using one of those plastic electrical outlet safety caps to hold them in you will have essentially duplicated what a quiet line filter is for a fraction of the cost. You can even add a varistor to it for a little surge suppression assistance.

https://www.amazon.com/GE-Children-Electrical-Outlets-51175/dp/B00NO030NC/ref=sr_1_9?dchild=1&keywords=electrical%2Boutlet%2Bcap&qid=1634990826&qsid=139-9725507-1125319&sr=8-9&sres=B002YEP5QE%2CB000XMNHSC%2CB097Y71PQL%2CB076HB6YGW%2CB003ATTR8Y%2CB092QNB6YH%2CB07L5HHMK8%2CB004CMS6WQ%2CB00NO030NC%2CB081F7XBJV%2CB000HEHD4A%2CB002TXGSSO%2CB00NVSNSR0%2CB09H1ZW5GX%2CB00005U8T5%2CB002N1LLZW%2CB008KNYRVC%2CB00002NADK%2CB089G3JCV7%2CB00ATSQBY2&th=1

[jimbones]

Ive got noise coming from my speakers Ive had a couple of people over to help trouble shoot it could never find the cause. Very frustrated.

[P.I.]

Ive got noise coming from my speakers Ive had a couple of people over to help trouble shoot it could never find the cause. Very frustrated.

Do tell.  Explain what you are hearing and its' level relative to a good listening SPL.

A short list of things you have tried will help, too.

Maybe between we can do the telefix thing between all of us.

 

[malloy]

However, I had a Quietline filter plugged into the same circuit as the TP Link and it "filtered" the digital signal... Removed it & all worked! LOL!

Cheers,
Pete

Hi Pete,

Were you joking when you commented about the TPLink?  I ask because I added one to my wireless extender (a Netgear) and suddenly I am getting dropouts in signal.  :

I removed it, and the Internet works again! Can these things interfere with wi-fi and wired signals?

Anyway, I used one on the wireless extender, two more on an extension cord where all my LED lights are plugged into. I think it removed some vocal harshness 

Paul