Mounting, Setting Levels | Atlantic Technology 4400 LR, 4400 C

Mounting	9

Instruction Manual

Setting Levels

When setting up a complete home theater we strongly recommend that you use a Sound Pressure Level (SPL) meter.As of this writing Radio Shack® has one that’s affordably priced (approximately $40) that can be used effectively. To use this meter, turn on your system, put the processor/receiver in Test Mode and set its main volume control to 0dB (or a reasonably loud level). Sit in the prime listening position,set the SPL meter to the 70dB scale,slow response,and C weighting.Hold the meter with the microphone pointed up, towards the ceiling and in front of you. Cycle the test tone from speaker to speaker, setting each to the same level (usually75dB) using the individual level settings available in the processor/receiver (please see the instructions for your processor/receiver if you are unsure of how to access the test signal or level controls).

IMPORTANT NOTE: The power recommendation for these speaker systems assumes that you will not operate your amplifier/receiver in a way that produces distortion. Even rugged speakers like these can be damaged by an amplifier driven into audible distortion. The harsh amplifier distortion (“clipping”) that occurs in this situation will even- tually cause damage to the speaker system. This type of damage may be cumulative and can build up over time, as the amplifier is driven into overload again and again. Such damage is easily identifiable through examination of the damaged speaker’s voice coil and is not covered by the warranty.

Mounting

System 4400 LR and SR speakers can be mounted in different ways:

On Stands Speaker stands are recommended to elevate the satellites to the proper position for maximum performance.Many brands of quality speaker stands have a through hole in the mounting plate that allows the speaker to be securely bolted to the stand. Use the ¼” x 20 insert on the bottom of each speaker to couple the stand directly to the speaker via a ¼” x 20 bolt. This connection is recommended not only for better sound but for safety (especially if you have little ones running around) The recommended stand height is approximately 30”. See Figure 5.

On the Wall (4400 LR and SR only) To mount your speakers on a wall,we have supplied metal key-hole brackets attached to the back of the cabinet. These speakers are heavy and care must be used when hanging them. Be sure to use a strong screw to drive into the wall, one whose head and shaft will fit within properly the keyhole opening and slot. Also be sure to drive the screw directly into a stud or to use a mounting device (such a molly- bolt) that is capable of safely holding the speaker’s weight. Never simply drive a nail or screw into sheet rock or other wall materials, as the 4400 SR is very heavy for its size.

NOTE: Always consult a knowledgeable installer regarding the proper mounting hardware to use with your speakers.

These systems will play very loudly when provided with enough undistorted power to do so. If necessary, consult your dealer or Atlantic Technology for additional information.

Figure 5

4400 LR

¼" x 20 insert

Top plate of stand with through-hole

¼" x 20 bolt