دایره المعارف تاسیسات برق (اطلاعات عمومی برق)
بلندگوهای میدرنج رو دیدین ؟ یه قطعه شبیه خازن روشون نصبه کسی میدونه اون قطعه دقیقا چیه ؟ که صدای بیس رو حذف میکنه ؟
|Connect your Loudspeakers.|
Hook up Diagrams for Loudspeakers
The audio/video receiver amplifies the audio from the source and sends the signals to the loudspeakers for you to hear. You need a connection path from the receiver to the speakers and this is accomplished by using speaker wire or cable, a metal (usually multi-strand) wire used to connect the speaker outputs on an amplifier to the binding posts on a loudspeaker. The most basic speaker wire, also know as zip cord, is a thin, light gauge wire.
Speaker wire is often made of copper, a good quality conductor. The metal wire is encased in some form of plastic coating that insulates the wire while still allowing the wire to be easily bent and turned. Most high-quality speaker wire is fairly thick with a gauge around 12.
Quality wires are usually terminated with a metal connector. The most commonly used of these connectors are spade lugs, banana connectors, and pin connectors. Bare wire without a connector may also be used.
Speaker cables should be heavy gauges with gold-plated spade lug or banana connectors for good signal transfer between amplifiers and speakers. Lengths of speaker cable should be kept to a minimum. Long runs of speaker wire should be heavy gauge to ensure enough power is transferred and the amplifier is not presented with too great an impedance or resistance. Speaker wire has its own impedance or resistance to the flow of electric current with heavier gauge cables having lower resistance ratings allowing the efficient flow of power from the amplifier to the speakers.
Your receiver will have at least one or two sets of relatively large terminals that are designed to accept speaker wire. Some models use only wire clips, which accept bare wire or pin connectors. Better models usually have binding posts for at least the front left and right speakers. Binding posts normally accept bare wire, pins, banana plugs, and spade lugs, though some omit support for one or the other of the last two. Bare wire and spade lugs provide the most secure connections, because they have the large contact areas and can be clamped down tightly. Snugly fitted banana plugs are almost as secure, and much more convenient when you need to disconnect and reconnect for any reason.
Although there is a thriving market in premium speaker cable, there is no real technical or sonic imperative for using wire of premium construction or exorbitant price. Ordinary stranded copper wire (lamp or zip cord) is perfectly satisfactory provided that it is not too skinny.
The thicker the wire, which corresponds to a lower gauge number (AWG), the less its resistance to the passage of electricity. The thinnest wire you should possibly consider using is 18-gauge, but since 16-gauge costs only slightly more, it is recommended. For long runs of more than 15 or 20 feet, you might consider moving up to thicker 14- or even thicker 12-gauge cable. If you do, just make sure whatever you buy is reasonably flexible; such thick cable can be too stiff to handle easily if it isn’t braided to maximize flexibility.
How do I connect my speakers?
Speaker wire consists of two leads, typically encased and bundled in plastic insulation, one for the positive signal, and one for the negative. Your speaker wire will probably be marked in some fashion like (+) and (-) or if not, you can look for colors or wire types to help you distinguish the two leads. Low cost speaker wire has a copper color wire and a silver color wire (actually just tinned copper) to help you connect it correctly.
The two wires connect to the two terminals on the back of the speaker and then to the positive and negative posts on the back of the receiver. Do this for each speaker in your system, connecting the proper speaker (center, left front, right front etc.) to the correct place on the back of the receiver. Remember to connect positive (speaker) to positive (receiver) and negative (speaker) to negative (receiver). Positive terminals are typically red and negative terminals are typically black.
Some loudspeakers only allow you to connect bare wire while more expensive speakers will have posts which allow bare wire, banana or spade connections.
Surround sound speaker hook up diagram:
This diagram shows a 5.1 surround sound setup.
This hook up diagram shows a 6.1 surround sound setup with two front speakers, a center speaker, two surround speakers, a back surround speaker and a powered subwoofer connection. Your receiver must be 6.1 or 7.1 capable, not just 5.1 capable in order to hook up this setup.
Typical audio/video receiver rear panel loudspeaker connections. 6.1 capable with an extra set of front speakers for another room.
• Audio Video Cables and Connections
How to hook up a powered subwoofer
A powered subwoofer will have a power cord in the rear to provide current to the built-in amplifier. You need a receiver with a dedicated output for a subwoofer using an RCA audio cable to connect receiver to subwoofer. The powered subwoofer will handle the sound amplification so your receiver does not have to.
Audio cable to connect receiver to subwoofer
Passive subwoofers do not have an amplifier and are connected like a regular speaker using speaker wire.
Digital Audio - Surround Sound
Surround Sound requires 5 loudspeakers and a sub-woofer (bass), an Audio/Video Receiver with Dolby Digital 5.1/DTS 5.1 decoding capability and a input source such as a digital TV signal or DVD-Video plus a connecting cable from source to Receiver. Connect the input source (digital cable box, satellite box, broadcast digital TV, DVD player) Digital Audio OUTPUT to the A/V receiver's Digital Audio INPUT port.
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