Quantum Science Audio

QSA Yellow AC Receptacle

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An essential audio system tweak. A QSA wall receptacle will improve resolution, soundstage, and overall tonal/timbre balance in your system. Highly recommended!

NOTE: QSA occasionally has order backlogs, and it may take up to 8 weeks to receive your item if we do not have it in stock. Please be patient, it will be worth the wait!

Pickup available at Shop location

Usually ready in 2-4 days

SA Yellow AC Receptacle

The Proof Lies In The Hearing

The QSA Yellow AC duplex is not a tweak.

When installed as a wall receptacle to feed your audio / video system, its effect is more like a component upgrade, and I dare to say : a big one !

Before purchasing I already owned QSA fuses and was very impressed by the positive effect they had on music.

A QSA AC receptacle goes way further, I could not believe it.

This is one of the biggest rewards that I know of and very easy to setup.

"Many people talk about QSA products. Some state for example that “Furutech receptacles are made with better parts so QSA can’t match or surpass them in terms of sound quality” That statement is so far from reality, it’s kind of funny. The receptacle I replaced was a Furutech, very well engineered and better looking but it cannot match the Yellow from QSA. The QSA Yellow receptacle brings delicacy, more air, layers have better separation. Less distortion / noise, more clarity and more grip. It is more natural and music is easy to listen to. The receptacle is a simple consumer grade outlet treated by QSA, looks cheap but I don’t care as it is simply phenomenal.

Bravo !  ... and thank you Michael for a perfect deal and super fast shipping.


Our customers are raving about QSA AC receptacles. Expect a larger soundstage, more inner detail, and a more natural sounding presentation. The Yellow QSA AC has been beating the most popular brands and models of AC receptacles out there. We like the QSA AC receptacles because once they are installed, they just work. If you have been hesitant to install the QSA fuses because of the risk of blowing a fuse, the QSA AC receptacles come very close to the performance of the fuses, without the risk. Powering a system that already has QSA fuses with the QSA receptacles advances performance by a significant measure.

After 22 years of research and development, QSA Has launched a series of audio enhancing products that are confounding listeners with the level of performance improvement that they are attaining with these modest looking devices. Through their proprietary processes and treatments, these normal looking outlets and fuses are transformed into paradigm shifting audio products.

Using the same processes and treatments as their highly regarded fuses, Quantum Science Audio are applying similar treatment to their line of AC receptacles. The colored hierarchy is much the same as well.Their sonic effects on components plugged into the AC receptacles are also similar, and even more beneficial if you have QSA fuses in your components.

The Yellow AC Receptacle is the entry level electrical outlet from QSA. It can go toe to toe with any other AC receptacle on the market, and costs less than the more exotic offerings from major audio receptacle manufacturers.

What You Will Hear

With All QSA Products the first thing you will notice is that the top end will open up with a sense of relaxation and ease. There is just a rightness, a wholeness when there should be wholeness, and separation when it occurs naturally. Bass will be quicker, dynamic, and have more detail. Voices and instruments will appear more transparent but with more harmonic realism, flesh/wood/brass tone, and focus. The Yellow possesses all of these attributes, and you will hear them without straining. As you move up the line, you just get more. At times you might not think more exists, but it does. Everything you play, I don't care how bad, harsh or fatiguing the recording, it will sound better and in many cases, it will actually be listenable rather than fatiquing.

A Word On Break In

Initially, the AC receptacle will be a little strident, but will settle in over the next few days.


Q: I already have (insert brand name here) power conditioner. How will a wall receptacle improve the sound if the AC has to run through the power conditioner before getting to the components?

A:All I can say is it does. It makes a system wide, huge difference. Even though the AC coming from the wall receptacle has to flow through all of the filtering of the power conditioner. Whatever the QSA receptacles are doing to eliminate noise, your power conditioner is not filtering the same noise, and it will not hinder the performance of the QSA receptacle. Your power conditioner and the QSA receptacle are working on two different levels, and types of noise. I guarantee you will hear a difference.

Q: Should I get rid of my power conditioner then?

A: Maybe, but probably not. As I said, power conditioners provide RF filtering, and other benefits. The QSA receptacles seem to work on different types of noise. All I know is that there is a significant improvement in the sound, even if you keep your power conditioner. I would say experiment if you have the option to. Perhaps even audition one of Tweek Geek's QSA power distributors along with the wall receptacle.

Need More Outlets?

Try the Tweek Geek built QSA Power Distributor. It houses 2 duplex receptacles, and also incorporates a QSA fuse.