MK Sound S-150THX AC Front View, Top View, Satellite/Subwoofer Phasing Test, Using the S-5000

MAIN SATELLITE SPEAKER

In these cases, please contact M&K Service and Parts department at (818) 701-7010, and we will send, at no charge, replacement self-adhesive foam pieces that can be easily applied to the cabinet's front baffle. See Figure 7 below. This will replace the foam normally held in place by the speaker grille and will insure that you get maximum performance from your S-5000s.

FIGURE 7

Using the S-5000	11-15/16"	Top view of the foam
without the speaker		pieces pictured on
grilles		the front view
		Please Note:
Attach these two pieces of		The angled side
		of the foam must
foam to the speaker’s front
		go to the outside
baffle when the speaker is
		of the cabinet
used without the grilles.
FRONT VIEW		TOP VIEW

9.SATELLITE/SUBWOOFER PHASING TEST

In any system using a subwoofer separate from Satellite speakers, a phasing test must be performed to insure good bass blending. This test insures optimum sound in the critical bass frequencies where your Subwoofer and Satellite speakers overlap.

HOME THX AUDIO SYSTEM

For a Home THX Audio system, follow the system instructions provided with the THX controller, as you will need to have correct phase among all the speakers in the system. These instructions will take you through the front channels, surround channels, and subwoofer.

SATELLITE/SUBWOOFER SYSTEM

If you own an M&K Powered Subwoofer, see its owner's manual for the correct procedure for matching phase between the Satellites and Subwoofer. Its "SUBWOOFER PHASE" switch makes this important test very easy. If your subwoofer does not have a "SUBWOOFER PHASE" switch, follow this procedure:

Play a familiar CD, LP, or tape with steady, consistent bass content through your system. Listen carefully to the "mid-bass" region of 75 - 125 Hz. This is the part of the spectrum where electric or string basses and drums pre- dominate. Then, reverse the Positive and Negative speaker inputs on the back of BOTH Satellite speakers.

You can do this at the back of both Satellite speakers, or at the Subwoofer's "TO SPEAKERS" terminals (certain models only), but never at both locations. The lead that was on the Positive (+) terminal should be switched to the Negative (—) terminal, and vice versa.

Now listen to the same musical passage as you did earlier, concentrating on the mid-bass region. If you hear less bass, the original connections were correct. If you hear more bass, the new connections are correct.

You need to perform this test because when Satellite speakers are located separate from a Subwoofer, each speaker is at a different distance from your ear. In some cases, the difference will be just enough so that the output from the Subwoofer arrives out of phase with the output of the Satellites. When this happens, that critical mid-bass is actually cancelled. You should re-do this test any time you move your speakers.

If you want to experiment further, you can move the Satellite speakers either towards or away from your listening position, making changes in small increments. This will "focus" the system's sound to its optimum. When you hear the best balance between stereo image localization and maximum impact and output in the mid-bass, you have the ideal location.

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