Specifications

20 Frequently Asked Questions and Troubleshooting
Your speakers are dusty. See the vacuuming FAQ. The
electrostatic charge on the element has attracted airborne
dust or pollen. Since 1993, all of our speakers have been
built with a charging circuit board that only charges the
electrostatic element when music plays. At other times
they are not charged and cannot collect dust. You can get
the same benefit by simply unplugging them whenever
they are not in use. A power strip is an easy way to do that.
Could my children, pets, or myself be shocked by the
high-voltage present in the electrostatic panel?
No. High voltage with low current is not dangerous. As a
matter of fact, the voltage in our speakers is 10 times
less than the static electricity that builds up on the surface
of your television screen.
How do MartinLogan speakers hold up over a long term
in the humidity of tropical climates?
We should tell you that MartinLogan indeed has a very
substantial number of customers in tropical regions of
the world. Our speakers have been serving them nicely for
many years. This concern may have come from our earlier
design of speakers, which were charged continuously.
Since 1993, all of our speakers have been designed so that
they only charge the panel while music is being played.
This improvement has made a tremendous difference
in the consistent performance of our product. There may
be a little more maintenance involved in humid regions
when not in an air conditioned environment. Simply
enough, the concern is to keep the electrostatic panels
dust free. Humidity will combine with any dust on the
panel to make it slightly conductive. This will result in a
slight pathway for the charge to leave the membrane of
the speaker. The solution is simple. They only require
occasional vacuuming with a strong vacuum hose.
How do I vacuum my MartinLogan speakers?
Vacuuming will be most effective if the speakers have
been unplugged for six hours or overnight. You need
not worry about the vacuum pressure damaging the
"delicate" membrane. It is extraordinarily durable
Dirt and dust may be vacuumed off with a brush attach-
ment connected to your vacuum cleaner, or you may
blow them off with compressed air. .
Should I unplug my speakers during a thunderstorm?
Yes, or before. It’s a good idea to disconnect all of your
audio/video components during stormy weather.
No Output
• Check that all your system components are turned on.
• Check your speaker wires and connections.
• Check all interconnecting cables.
Weak Output from Electrostatic Panel, Loss of Highs
• Check the power cord. Is it properly connected to the
speaker and to the wall?
• Is the power cord connected to a switched outlet?
• Dirt and dust may need to be vacuumed off. Please see
the FAQ regarding vacuuming.
Popping and Ticking Sounds, Funny Noises
• These occasional noises are harmless and will not hurt
your audio system or your speakers. All electrostatic
speakers are guilty of making odd noises at one time or
another. It is the result of airborne contaminates (most
notably dust). Vacuuming is recommended.
• These noises may be caused by dirt and dust particles
collecting on the speaker, by high humidity.
• Dirt and dust may need to be vacuumed off. Please see
the FAQ regarding vacuuming.
Exaggerated Highs, Brightness
• Check the toe-in of the speakers. Read the Placement
section of this manual for more information.
Muddy Bass
• Check placement. Try moving the speakers closer to
the front and sidewalls.
• Check the type of feet that are being used. Try attaching
the coupling spikes.
• Possibly means low electrostatic panel output. See 'Weak
Output from Electrostatic Panel, Loss of Highs’.
Lack of Bass, No Bass
• Check your speaker wires. Is the polarity correct?
• Check your speaker wires. Are both woofers working?
• Check your speaker wires if bi-wiring.
Poor Imaging
• Check placement. Are both speakers the same distance
from the walls? Do they have the same amount of toe-
in? Try moving the speakers away from the back and
sidewalls.
• Check the polarity of the speaker wires. Are they con-
nected properly?
Troubleshooting