Magnepan MG 20.1 - Manual (Page 10)

14. OPTIONAL RIBBON TWEETER ATTENUATION
There are two principal reasons for needing to attenuate the Magneplanar
Ribbon Tweeter:
A) Recordings, typically in the ''pop'' or ''rock'' vein, often exhibit a
pronounced rise in the treble region.
B) The Magneplanar Ribbon Tweeter is very efficient in its total
''energy dispersion." If the surrounding walls are exceptionally
reflective, the overall perceived acoustical balance will be tipped
towards a ''hot'' high end.
Attenuation is performed through insertion of a simple non-inductive
resistor in series with the tweeter.
There are inputs provided on the connector plate of each speaker for
insertion of a resistor. To insert a resistor simply loosen the Allen screws,
remove the jumper, insert the resistor, and tighten the screws. A 1 ohm non-
inductive resistor will attenuate the tweeter approximately 2dB. Other values can
also be used and are available from your Magneplanar dealer.
15. MAINTENANCE
The wood trim can be cleaned and polished with a damp cloth. In the event the
speaker's fabric is damaged or soiled, replacement covers are available. DO
NOT VACUUM TWEETER CHANNEL!
16. SERVICE AND SHIPPING
In the unlikely event you should need service for your MG20.1
loudspeakers, we recommend you return them through your dealer. He is
experienced in providing service and can assist you if the speakers must be
returned to the factory.
lf it is determined that your speakers must be returned for repair, ship
them (freight prepaid--ask for Rate Class 100 via truck) to: Magnepan,
Incorporated, 1645 Ninth St., White Bear Lake, MN 55110. Include a packing
slip or letter describing the nature of the problem. Please include your name,
address, and a daytime telephone number.
Before packaging, very carefully install steel protector strips overdue
ribbon tweeters and remove the ribbon tweeters, following the removal
instructions on Page 4. Do not let the steel strips slap against the magnets.