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Magneplanar 20.7 Instruction Manual
Quick Step-Up Instructions
The 20.7 has exceptional phase characteristics that are accomplished without the use of compensation networks. To
realize the optimum phasing, the 20.7 should be angled inward as shown in the diagrams below. (Do not place parallel to
the front wall.) Depending upon the acoustics of your room, the imaging and sound stage may be better with the tweeters
on the inside for listening only in the "sweet spot". For a larger audience or listening off to one side, tweeters on the outside
will keep the image centered for those listening off-axis.
Your 20.7s have been shipped with the tweeter jumpers removed.
You must install a resistor or jumper for the operation of the tweeters. Most listening rooms will have the smoothest
response when using the enclosed 1 ohm resistor for the tweeter. Rooms that are large and/or overly-damped may require
the enclosed jumper for smooth response.
Especially, during the break-in period, experiment with the 1 ohm resistors on the midrange. The addition of the midrange
resistor will provide a "warmer" balance.
TABLE OF CONTENTS
1.  Introduction
2.  General Description
3.  Carton Contents
4.  Packaging
5.  Assembly
6.  Tweeter Installation
7.  Hookup
8.  Caution
9.  Speaker Placement
10.  Bass Response
11.  Stereo Width and Imaging
12.  Left/Right
13.  Phasing
14.  Room Acoustics
15.  Optional Tweeter Attenuation
16.  Maintenance
17.  Specifications
1.  Introduction
Congratulations on your purchase. The Magneplanar 20.7 loudspeaker was conceived and designed by
perfectionists, for perfectionists. Due to the elegant simplicity and ruggedness of the design, the Magneplanar 20.7
loudspeaker will give many years of trouble-free service.
2.  General Description
The 20.7 is a 3-way, full-range ribbon design with a quasi-ribbon bass and quasi-ribbon midrange, and true-ribbon
tweeter.

Summary of content (5 pages)

PAGE 1
Magneplanar 20.7 Instruction Manual Quick Step-Up Instructions The 20.7 has exceptional phase characteristics that are accomplished without the use of compensation networks. To realize the optimum phasing, the 20.7 should be angled inward as shown in the diagrams below. (Do not place parallel to the front wall.) Depending upon the acoustics of your room, the imaging and sound stage may be better with the tweeters on the inside for listening only in the "sweet spot".
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3. Carton Contents 1 pair 20.7 loudspeakers 2 each ribbon tweeters with screws 4 each feet 4 each handles 8 each foot bolts 4 each wooden handles 4 each 1 ohm resistors 2 each 5 amp fast-blow fuses 2 each 2 1/2 amp fast-blow fuses 4 each tweeter end covers 2 each jumpers 2 each Magneplanar logos 1 each ball point Hex driver 4. Packaging Save all packaging. If you need to transport the speakers, they can be shipped safely only in the original packaging.
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8. Caution The terminal plate states a maximum fuse value of 5 amps Type 3AG ("normal" or "fast blow") for the midrange and 2 1/2 amps for the tweeter. The bass section does not require fusing protection. This fuse value should never be increased or bypassed. Do not use slow-blow fuses. BURNED OUT MIDRANGE OR TWEETERS ARE NOT COVERED UNDER THE WARRANTY. 9.
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12. Stereo Width and Imaging Once you have located the best position for the speakers and your chair for bass performance, separate the speakers by 50-60% of the distance from your chair to the speakers. For example, if your chair is 10 feet from the speakers, move the speakers 5-6 feet apart. Now, move the speakers apart in increments of 3 or 4 inches at a time, listening carefully at each position. At some point you will start to hear two separate speakers instead of a stage effect or continuous image.
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15. Optional Tweeter or Midrange Attenuation To attenuate the tweeter or midrange, remove the jumper(s) and install a resistor. The 1 ohm resistor is the standard tweeter and midrange resistor values. Other tweeter and midrange resistor values are available from your Magneplanar dealer. In addition to the tweeter resistor, installing the 1 ohm midrange resistor will also provide a "warmer" balance. 16.