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Two prong plug which is positive and negative on speaker

Discussion in ' Audio Hardware ' started by baconbadge , Oct 24, Log in or Sign up. Steve Hoffman Music Forums. Location: Queens, NY. A few months ago on the recommendation of an old post by Mr.


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Discussion in ' Audio Hardware ' started by baconbadge , Oct 24, Log in or Sign up. Steve Hoffman Music Forums. Location: Queens, NY. A few months ago on the recommendation of an old post by Mr. Hoffman I bought a Fisher c. Steve also posted the following "instructions" that were given to him about using his new Fisher: " 1. Power outlet: As you know these older devices do not come equipped with a plug that has the wider prong to identify it as being grounded.

Nonetheless, it is important to pay attention to the orientation when you plug it in. The way to identify which way the plug goes in is by feeling the power cord. One side of the cord is completely curved and smooth on the outside while the other side of the cord has an edge. The side that is smooth should plug into the wider prong on your wall socket. In other words, does it apply to ALL cords? The reason I ask is that my Silvertone guitar amp has a non-polarized plug and it also has a "ridged" side and a smooth side running down the cord.

BUT, I looked online and found a site about repairing a lamp cord that said the exact opposite! I ALSO read somewhere that if one of the wires has printing on it, and the other does not, then that's usually the hot side. Does anyone have a definitive answer on this??? I apologize if this has been covered before I know that the topic of flipping the cord around reversing polarity and getting a different sound HAS been covered in older posts. So thank you all for that. Location: Kirkwood, MO. Open it up and find out which side of the line is switched off and on and which is permanently connected.

The switched side should be hot. In Europe a double pole switch is standard, but most American equipment opens up one side. Find the hot side of the outlet with a neon test light. Burt , Oct 24, Location: Midwest, USA.

Last edited: Oct 24, Just a layman here I was hoping for a general rule of thumb that could be applied when I come across an older non-polarized two prong plug ie- my Kenwood KA, or a vintage guitar amp. Ok, so I get that on newer polarized plugs, the ridged side is always going to be the neutral and will go to the big prong If so, then that would make The Fisher an anomaly? Even with a standard on non-polarized two-wire plugs, it could be wired wrong and still operate normally.

You can only be sure of the wiring by checking it. Easy, fast, reliable to accomplish using a meter. BuddhaBob , Oct 24, Ghostworld , Shawn , baconbadge and 1 other person like this.

Location: Long Island, NY. Just curious, as I'm using an amp of a similar vintage Could it be harmful to the equipment or detrimental to its performance? MrRom92 , Oct 24, SandAndGlass , Oct 24, Location: Atlanta. To complicate matters further there is this; My electrician hooked up my sub panel with some dedicated lines on each leg of the fuse box.

So each amp is running off a leg opposite to the other. Will being on opposite sides of the fuse box affect the polarity even when the plug is oriented correctly? Dentdog , Oct 24, KT88 , Oct 24, MrRom92 likes this. Burt , Oct 25, Location: Wappingers Falls NY. Wally Swift , xantus and baconbadge like this.

SandAndGlass , Oct 25, The FRiNgE and baconbadge like this. KT88 , Oct 25, I just did a test on a Marantz B, that was manufactured around the middle s, and here are my findings. First the Marantz has a 2. The resistor is connected to the chassis of the Marantz. The Line with the 2. Note, that is meaningless to the average retail consumer out there. With the Marantz plugged into wall outlet receptacle power switch turned off.

Plug in one direction the meter measured 95 volts from the chassis of the Marantz to the safety equipment ground of the wall duplex receptacle. Obviously in this direction the Hot line is feeding the side the resistor is connected to.

This voltage represents an open no load reading and does not present any electrical shock hazard. Remember the 2. Next with the plug reversed the meter measured 2. In this instance the neutral, the identified conductor of the cord, was feeding the side with the resistor. This would be the correct plug orientation for power to be connected to the Marantz with the Hot Line feeding the switch and fuse, and the neutral Line feeding the other side of the primary winding of the power transformer.

When the switch is off no voltage potential is present on the primary winding. With the AC plug plugged into the wall receptacle in one direction the meter measured 88 volts. This measurement has the Hot Line connected to the side that feeds the primary winding directly and also has the 2. With the plug reversed the meter measured This has the neutral Line connected directly to the primary winding of the power transformer and the 2.

Again this is the correct AC plug orientation. So why the differences in voltage measurements with the power switch of the Marantz opened or closed? As much as I hate to I will have to pull the bottom cover off the Marantz and lift one end of the 2. This will verify that the primary winding of the power transformer has a proper AC polarity orientation for which side the Hot and neutral Lines should be connected to.

I had a Fisher once that apparently had been dropped on the corner where the power fuse resides. The center spring-side contact of the fuse holder was touching the chassis. I'ts a long story of events that this caused me but I'm just mentioning it because the AC cord first hits the fuse holder, then to the switch.

Also, yes, it's good to know which side is the hot side but still, it ends up at the power transformer anyway so it's not like either side of the AC cord should be contacting the chassis anyway. Uhm, except in the case I mentioned about mine. P2CH , Oct 25, BuddhaBob likes this. Last edited: Oct 25, Show Ignored Content. Share This Page. Your name or email address: Do you already have an account?

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How To Connect Speaker Wire – A Detailed Guide For Everyone!

Wiki User. On a molded 2- or 3-wire line cord the ribbed conductor is the neutral conductor. On a polarized 2-prong plug it will be connected to the wider blade. On some line cords the neutral conductor may have a white stripe instead of ribs. Ok for all you crazy people the because i made a mistake and hooked the wires up backwards so the ribbed wire is negative. Connect the black wire to the smooth wire.

Often pins 1 and 2 will be negative, 3 and 4 positive for a higher current rating. Female connectors are used as supply and male connectors are used on loads.

How to Connect Speaker Wire and Identify the Different Connector Types


Electricity can KILL!! If you are in any doubt at all about what you are doing, or your ability to do the work, you should refer any mains connection work to a qualified electrician. NEMA P are the two-prong plugs commonly found on household lamps and consumer electronics such as clocks. Early examples were symmetrical, but later sockets and most newer plugs distinguish the neutral conductor by making it slightly wider than the hot one. Such newer plugs often will not fit in old sockets, but both versions fit in type B sockets. Some devices that meet strict standards, such as sealed electronic power supplies, are still sold with both pins narrow. The neutral insertion point in the modern type A socket is wider to accommodate polarized type A plugs. The NEMA range of connectors have been effectively discontinued for some time.

Understanding DC Power Supplies

two prong plug which is positive and negative on speaker

Thanks to engineer Nikola Tesla, who designed and helped build the first large-scale power generating station at Niagara Falls at the turn of the 20th century, the power supplied to homes throughout the world comes from alternating current generators. Because AC current changes direction many times a second, you can't speak of "positive" and "negative" terminals. Instead, one of the wires is the "hot" wire, and the other is the "neutral" or "return" wire. If you were to touch only the neutral wire, you wouldn't feel anything, but you would get a shock if you touched only the hot wire.

If you are wiring speakers, you must know the correct way to do it.

How to Tell the Negative on an Electrical Appliance Cord


I usually buy my 2 pin DIN plugs and sockets from Maplins, but as they were out of stock, I bought some from eBay instead. Got some speaker cables to make up and I don't want to mess it up!! Round pin is positive red , spade is negative black. Same on the socket end, since reversing them on the socket end would make a terrible fit! Reversing the wires doesn't break anything, but it inverts the phase of your loudspeakers, which may degrade the audio quality specifically in the low end somewhat. Especially when the speakers are accidentally connected in opposing phase, the lows from either side cancel each other out.

Electronic wiring

Various cables and connectors are used with PA systems to link all the equipment together. If the wrong cables or connectors are used, equipment may not operate correctly. In the worst-case, using the wrong cables or connectors could be dangerous, so be sure to understand which cables and connectors to use. These connectors are frequently used in professional applications—which demand reliability—as they are compatible with the balanced method described later, are sturdy and resistant to deformation, and feature a locking mechanism so that cables will not disconnect even if pulled. They are generally used with PA systems for microphones, power amplifiers, powered speakers, etc. There are two types of phone connector: stereo and monaural. Stereo phone connectors are also called TRS phone connectors. They are used to handle stereo signals for headphones, as well as to insert effects.

Got some speaker cables to make up and I don't want to mess it up!! Wikipedia! Round pin is positive (red), spade is negative (black).

on a plug which side is positive and negative

Updated: July 4, Before you begin it may seem like a tricky business. But, once you give it some thought, it quite straightforward.

Wiring an American Plug


When connecting to a volt appliance, you will have two terminals and these two conductors can connect to either terminal each. How can I determine which wire is positive and which is negative. Take the red positive probe from your multimeter and stick it into the end of the power supply plug. You may have to register before you can post: click the register link above to proceed.

The most common kinds of markings are shown here as examples.

DC connector

The yellow wire is the 12 volt battery wire, which should also be attached to the stereo for power. The final wire, the black wire, is the ground wire. This wire, once attached to the stereo, will help ground it. Yellow wires are used as switch legs to ceiling fans, structural lights, and outlets paired with light switches, while blue wires are usually used as travelers for three-or-four-way switches. Wires with black stripe are for negative power: Right front speaker: gray.

Knowing the Difference Between Positive and Negative Speaker Wire

Click to see full answer. Moreover, is the big prong on a plug positive? Look at the Plug On cords of this type, the larger prong connects to the neutral wire.




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