Final Installation in New or Existing Construction
Final Installation in New or Existing Construction
1.If it is possible to lay a batt of insulation into the ceiling cavity do so. Remember to use equal amounts of insulation for each speaker.
2.Check the position of the Impedance Jumper on the crossover PC board. Choose the 4 ohm position if you are using an amplifier capable of drawing a 4 ohm load and you have only one pair of speakers connected. Otherwise, use the 8 ohm position (See Figure 15).
3.Separate the speaker wire so that at least two inches of each conductor are free.
4.Open the
5.Insert one unstripped wire fully into the black and one into the red terminal. Pay attention to the markings on the wire. Each speaker must be connected to the amplifier in the same way. If unsure, see “Speaker Phase” located on the fol- lowing page. Squeeze the red and black levers until they click signifying that they have locked into the wire. Check to make sure that the knife assembly inside the no strip connector has prop- erly pierced the wire (See Figure 16).
6.Insert the no strip terminal into the corresponding socket on the rear of the speaker. Push it down until it locks in place. The terminal will only fit in the socket in one direction. If the ter- minal does not properly seat, reverse the terminal
7.On both models, there are four clamps or mounting “dogs” which hold each speaker in place. The dogs are tight- ened via four
NOTE: The screws will be easier to turn if you “prime” them first. Before installing each speaker, turn the screws in and then turn them back out to their original positions.
8.Direct the Tweeter. The tweeter is directed by gently pushing on the edge of the tweeter grille. It will move 20° in any direction. For critical listening point the tweeter to the user’s favorite listen- ing position minimizing reflections from the side walls. For surround sound or low volume background listening cre- ate more reflections and thus more ambience by directing the tweeter towards the side walls. See Speaker Placement on Page 6.
still more reflections and thus more “sur- round sound” effect. However, as you move the speaker farther away from the listener, both the reflected and the direct sound will dissipate, requiring more power from your surround sound amplifier channels. If the surround sound system you are using has a small five or ten watt amplifier for the rear speakers, stay within five to eight feet of the listening location. If you are using a 25 to 50 watt amplifier you can mount the speakers 10 to 15 feet away from the listening location and still achieve reasonably high volume levels.
In large or unusually shaped rooms, using multiple speakers might be the only way to achieve a good effect. In large or unusual- ly shaped rooms this might be the only way to achieve a good effect. If you like to listen to music surround modes which emulate concert hall acoustics, more than two surround speakers will prove extraor- dinarily effective (See Figure 6). With Niles CM5PR and CM6PR loudspeakers it is easy to add another pair without affect- ing the decor of the room. However, you will need to use a much more powerful
amplifier than that which is built into a typical surround sound receiver or ampli- fier. Niles makes a number of Systems Integration Amplifiers with proprietary features that make them uniquely suited to enhance a good surround sound sys- tem. Consult your local Niles dealer for more information.
The Boundary Effect
Corners can affect the bass response of the speaker powerfully! This is called the boundary effect. You will emphasize par- ticular bass frequencies and cancel out other bass frequencies when you place speakers close to the wall/ceiling bound- ary or a corner wall boundary. This can make the speaker sound excessively boomy and inaccurate to some listeners, while to others it just seems like more bass sound. A good rule of thumb is if you always listen to your current pair of speak- ers with the bass turned up, you’ll enjoy corner placement. If you keep your tone controls at neutral, try to keep the speak- ers at least two or three feet from the boundaries of the room.
Speaker Placement
Figure 5 | Figure 6 |
Varying Listening Position | Surround Sound |
Figure 15 Setting the Impedance Jumper. | Figure 16 |
15 | 8 |
