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Speaker Terminology
On enclosures
Understanding Theil-Small Specifications
How Speakers Work
On Woofers
Glossary
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Speaker Tips for the Home Audio connoisseur |
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Home . Speakers . Electronics . Cenophase . Technical education . Policies . Car Stereo |
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1. "ZIP CORD"is probably the wire connecting your amp or receiver to your loudspeakers. It can be the very small gauge (#24 ) or possibly ordinary 18 Ga. lamp cord. It is made up of two stranded wire leads, joined for convenience and divided at each end to connect the output terminals on your amplifier or your receiver to the input terminals of your speaker. If your system does have the very small wire between the amp or receiver, and speakers, put zip cord (available at your hardware store) on your list of future purchases when the budget allows it, You'll find that standard zip cord is #18 gauge which is the minimum size you should be using. The heavier #16 to 12 gauge (yes, gauge sizes increase as the number goes smaller) is better. But remember, all the hype about expensive super ultra heavy gauge wire is exactly that. The role of wire gauge and type has been considerably exaggerated to sell unneeded expensive extras. If you have a powerful amp, (80 to 150 watts per channel) go for the 14 to 12 gauge wire, otherwise, 16 will do it quite nicely. This goes equally well for car speakers, except that because the impedance is lower, (usually 4 Ohms, instead of 8) the wire gauge is adjusted upward one notch in size, so instead of 16 gauge, for out puts up to 80 watts RMS, use 14 instead. 2. MOVE YOUR SPEAKERS away from the walls. This isn't always possible, but your sound may improve a lot if you can locate them away from a back wall, as well as sidewalls. The reason for this is that the reproduced sound from your speakers reflects off nearby boundary walls and these reflections are added to the original signal. If your speakers are bookshelf types, get them out of the bookshelves and into the room. Experiment with different locations to find the best results. 3. ELEVATE THE SPEAKERS off the floor. More and more listeners are finding that putting their boxes on stands, or some sort of base that lifts the end off the floor, vastly improves the sound, giving it more presence. If you have two-way systems with a large woofer for the low sounds and a smaller one for the highs, turn the speaker on its short end, with the larger driver closest to the floor. The tweeters should be on top, thus if you elevate your speakers, the more directional tweeters will have an improved opportunity to deliver their sound to your ears. Experiment with small tables or stands, even bricks or concrete blocks temporarily, to study the effect. Every room is different, and short of using expensive measuring equipment and a computer program, the only practical way to find the best location (as in 2 above) and the best distance from the floor, is by experimentation. Commercial stands for loudspeakers, especially in two-way systems, or in three-way types for the mid- and upper-range drivers, have become very popular in the last decade among audiophiles. If you cannot afford to buy or make (various books offers plans for building several types) stands, you can usually improvise with available alternatives, possibly covering blocks or bricks with inexpensive coverings. 4. OBSERVE THE POLARITY of your speaker connections very carefully. You can improve the bass by making sure the correct polarity is observed. One conductor of the speaker cable will be copper the other, silver; or one side will have a raised plastic stripe down its length. Connect the copper or "red" or the Raised stripe side, to the positive or red terminal on both amp and speaker. The other, of course, goes to the negative or black terminal. Do this for both speakers. As an experiment, change -reverse- the connections on just one speaker, to check the phase. If the sound has noticeably less bass, then the original connection was correct. It usually is. But this demonstrates the fact that if the bass wave is out of phase with that produced by the other speaker(s) in the room, the sound you hear will be greatly diminished. Whichever position produces the most bass is the "correct" position. Leave it there. 5. ARRANGE
YOUR SPEAKERS Rear speakers should be placed on either side and several feet above head level in the listening position. Tall stands, book shelves and wall mount devices, as well as built-in arrangements can all be used effectively for this purpose. The main point is that such drivers be just above and slightly to the rear of the listener, but be sure the drivers face the listener. The powered or passive subwoofer can be placed in a corner of the room for greatest effect, or hidden as a piece of furniture. Because it produces very deep bass frequencies with very long wavelengths, the sounds will be felt as much as heard. The dispersion will be roughly the same anywhere in a normal room. Use only one woofer to avoid bass diminishing, phase cancellation.
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