MartinLogan Source Speakers user manual Final Placement, Imaging, Bass Response, Tonal Balance

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Tilting the Speakers Backwards and Forwards As the diagrams show in the Dispersion Interactions sec- tion of this manual (page 12), the vertical dispersion is directional above and below the stator panel itself. In some instances, if you are sitting close to the floor, slight forward tilting of the speakers can enhance clarity and precision. Tilt can be adjusted by adjusting the MiniETC spikes (see page 11).

Your Source loudspeaker also is equipped with a pivoting base which allows the speaker to achieve an additional

Figures 3–5.Rotate the base to accommodate various listening positions.

12° of tilt beyond the standard 1°. Experimenting with increased tilt may yield a superior listening experience.

1Turn off you amplifier. Unplug the speakers and discon- nect all wires from the back of the Purity.

2Using a blanket to protect Purity’s cabinet, place the speaker on its side.

3Loosen and remove the hand nut on bottom of the speaker.

4Remove the base, rotate it, and replace it.

5 Re-attach the hand nut.

Imaging

In their final location, your Source’s can have a stage width somewhat wider than the speakers themselves. On well recorded music, the instruments can extend beyond the edges of each speaker (left and right), yet a vocalist should appear directly in the middle. The size of the instruments should be neither too large nor too small, subject to the intent and results of each unique audio recording.

Additionally, you should find good clues as to stage depth. Make sure that the vertical alignment, distance from the front wall, and toe-in is exactly the same for both speakers. This will greatly enhance the quality of your imaging.

Bass Response

Your bass response should neither be one note nor should it be too heavy. It should extend to the deep- est organ passages and yet be tight and well defined. Kick-drums should be tight and percussive—string bass notes should be uniform and consistent through- out the entirety of the run without booming or thudding.

Tonal Balance

Voices should be natural and full and cymbals should be detailed and articulate yet not bright and piercing, pianos should have a nice transient characteristic and deep tonal registers. This will give you clues on how to get closer to these ideal virtues.

Final Placement

After the full break in period, obtaining good wall treat- ments, and the proper toe-in angle, begin to experiment with the distance from the wall behind the speakers. Move

Placement & Room Acoustics 9

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Contents U R C ETM Serial Numbers Contents Installation in Brief Introduction Connections Low-Voltage DC Power ConnectionBreak-In Speaker Level ConnectionPlacement & Room Acoustics Imaging Final PlacementBass Response Tonal BalanceExtra Tweak Your RoomTerminology Rules of Thumb Dipolar Speakers and Your RoomSolid Footing Controlled Horizontal Dispersion Dispersion InteractionsControlled Vertical Dispersion Three Major Types of DispersionFront Left and Front Right Home TheaterCenter Channel Surround SpeakersElectrostatic Advantages Full Range Operation Martinlogan ExclusivesGeneration 2 Diaphragm CLS Curvilinear Line SourceMicroPerf Stator Vacuum BondingElectrostatic History Page Frequently Asked Questions How do I clean my speakers? What is the advantage of ESL?What size amplifier should I use? Should I unplug my speakers during a thun- derstorm? Troubleshooting Warranty and Registration SpecificationsService General InformationDimensional Drawings Glossary of Audio Terms Page Page Page Rev. #051007