MartinLogan Summit X user manual Controls and Connection

drum or a pipe organ). When adjusting the 25Hz and 50Hz levels we recommend doing so with two or three people—one located at the listening position and one or two people at the controls.

1Start with the 25Hz and 50Hz level knobs set to 0dB. The person at the listening position needs to become familiar with the sound at this setting. Remember, only the person in the listening position should judge the bass integration. Nodes and nulls change dramatically throughout every location in a room. A person adjust- ing the controls on the speaker will experience an entirely different bass performance than a person sit- ting in the listening position.

2Adjust the 25Hz level knob by +10dB. In most cases the bass will sound boomy and unnatural. Return the setting to 0dB and listen to the speaker again for a moment. Next, adjust the 25Hz knob by –10dB. In most cases the bass will sound thin. Return the setting to 0dB and listen again for a moment.

Now you have an idea of the control you have over the 25Hz output. If you feel the bass is too boomy at 0dB, adjust towards the negative settings. If it is to thin at 0dB, adjust toward the positive settings. Repeat this procedure using increasingly smaller amounts (8dB, 6dB, 4dB, etc.) until you find a setting where the low bass sounds balanced—remember to return the knob to 0dB and listen for a moment between each adjustment. Once you’ve found the best sounding setting for your room, make a note of the set- ting.

3Repeat step 2 to adjust the 50Hz level knob

4Setting one level may effect enough change that the other is no longer ideal. Once you have determined and noted the settings for both knobs repeat this pro- cedure with finer adjustments around the points you’ve already chosen.

Remember—due to the unpredictabililty of every lis- tening room, experimentation is essential when setting up a loudspeaker. It may take several attempts to find a combination of control settings, speaker positions, and listening position that is ideal for you and your listening preferences. If you still hear anomalies, you may need to

experiment with speaker placement or the location of the listening position—sometimes even the subtlest adjust- ments will make huge changes!

Controls and Connection 9