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AEA R44 and A440

Owner’s Manual

one of the quietest mics on the market and the quietest ribbon microphone ever. The 7 mA version has 
a 9 dBA noise floor and handles 136 db SPL. The custom 9 mA version has a 6 dbA noise floor and 
handles 132.5 db SPL. The A440 can drive very long mic cables without signal loss.

It’s Only a Microphone. Why Do I Need an Owner’s Manual?

Your new ribbon microphone, like all of the equipment in your recording system, is an investment in 
your future. It also may be the most sensitive and delicate item in your studio. Knowing how to use it 
properly will enable you to maintain its performance and value for decades to come — long after most 
of your other equipment has become obsolete.

Your Microphone Needs Good Support.

By now, you have discovered that this is a large, rather heavy microphone. In fact, it is more than 12 
inches long and weighs about 8 pounds. In order to support it safely, you need a strong and sturdy mi-
crophone stand, such as the Atlas MS20 or MS25. If you want to use a boom arm, you could add an 
Atlas PB21X or better yet, use the Atlas SB36 studio boom stand. While there are many suitable stands 
from other manufacturers, conventional “musicians’ series” folding tripod-based microphone stands are 
not recommended because they are not robust enough to support this microphone safely. If you do need 
a portable stand for your mic, check out the Modular Microphone Stands page at the AEA website: 
http://www.ribbonmics.com/aea/modular_microphone_stands.html.
 

The AEA model R44 and A440 ribbon microphones carry forward the classic 
tradition of the venerable 1930s RCA-44 into the 21st century. AEA’s range 
of Big Ribbon™ mics offer the same warm, rich “long ribbon” sound of their 
ancestors. The R44 series even uses “new old-stock” RCA ribbon material 
and features a re-engineered output transformer that recaptures the sonic 
signature of the original RCA-44 and surpasses it in frequency response and 
dynamics. The R44C is a visual and sonic reproduction, taking the best of the 
RCA-44B and BX design, while the R44CX is the high-output version.

The A440 marries the high-output CX motor to a phantom-powered discrete-
JFET impedance buffer with a very high turns-ratio transformer. The result is 

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Associates

1029 N. Allen Ave.      Pasadena      CA      91104      www.ribbonmics.com      Phone: (626) 798-9128      Fax: (626) 798-2378

Summary of Contents for AEA A440

Page 1: ...e Atlas SB36 studio boom stand While there are many suitable stands from other manufacturers conventional musicians series folding tripod based microphone stands are not recommended because they are n...

Page 2: ...the ribbon however is a strong gust of air such as from a nearby open door window or air conditioning vent the close pulse from a bass drum the turn on thump from a guitar or bass amplifier moving or...

Page 3: ...null of all polar patterns nearly 90dB in the plane of the diaphragm with a well designed model It is important to realize that this null plane extends both laterally and vertically with respect to t...

Page 4: ...phone is only 6dB down at 90 the potential for feedback can be high By using a bidirectional microphone however with the deep null plane aimed directly at the cluster the potential for feedback can be...

Page 5: ...noise will self cancel and sound sources that are closer and more directly on axis will prevail Jim Tannenbaum a very active film dialog mixer in Hollywood explained at an AES Workshop how he uses thi...

Page 6: ...his can elim inate the need to rely on a mixing engineer to make them sound right the musicians do it themselves For Announcers Dialog and Radio Plays Ever since the golden days of radio in the 1930s...

Page 7: ...nd depth Like most things in audio however the potential tradeoff is reduced articulation or clarity that can result from excessive bass response or boominess Proximity effect should be treated like a...

Page 8: ...sonant frequency it exhibits none of the upper midrange high Q resonance peaks common to large diaphragm condensers This ribbon design delivers extremely fast and accurate transients Such a lightly te...

Page 9: ...Level changes with angle frequency response is consistent 90 dB null at 90 270 Vertical Level changes with angle reduced HF response above and below 0 180 axis null at 90 270 Transducer element Ribbon...

Page 10: ...t 7 mA current draw it has a 9 dBA noise floor and handles 136 db SPL A custom 9 mA version has a 6 dbA noise floor and handles 132 5 db SPL Such wide dynamic range is equal to the best studio condens...

Page 11: ...Displayed range from 100 Hz up due to measurement room size limitations...

Page 12: ...open the case Audio Engineering Associates 1029 North Allen Avenue Pasadena CA 91104 Phone 1 626 798 9128 Fax 1 626 798 2378 URL www ribbonmics com e mail stereoms aol com References and Recommended...

Page 13: ...pickups and have an omnidirectional polar pattern because absolute pressure is not dependent on the direction of approach ref Figure 5 The first microphones were developed by the infant telephone indu...

Page 14: ...of the ribbon This ribbon was suspended in a magnetic field and thus generated a small electric current in direct response to its movement ref Figures 6A and 6B The term velocity microphone also is c...

Page 15: ...properly designed single diaphragm bidirectional microphone a response null of almost 90dB will oc cur at precisely 90 from the principal pickup axis Figure 8 shows that this null exists both vertica...

Page 16: ...oday Since the early 1980s Audio Engineering Associates has been proud to spearhead the reintroduction of these venerable classics to the industry and to continue their tradition with new and improved...

Page 17: ...o Engineering Society June 1970 The rapid advancement of permanent magnet technology in the 1930s had freed Olson s ribbon micro phones from the constraints of using an electromagnet The 44 had an acc...

Page 18: ...en the AEA R 44C and the RCA 44B BX is in the magnets The RCA 44B BX used high output Alnico magnets the best available at the time By the 1990s neodymium had replaced Alnico as the best material for...

Page 19: ...making it among the quietest microphones made Although the acoustic fre quency response of an A440 is the same as an R44CX the sonic character is different This character is often described as warmer...

Page 20: ...um All the closer microphones were AEA ribbons with the electric cello on an AEA R44CNE http www wesdooley com pdf PR_Turtle_Island_String_Quartet2 doc Is the A440 the best 44 incarnation ever Time wi...

Page 21: ...se and accurate localiza tion within the stereo stage As with a single bidirectional microphone a Blumlein pair can be worked from opposite sides with equal effect This allows multiple actors or music...

Page 22: ...orward facing mid microphone and a laterally oriented bidirectional side microphone By combining these component signals via a sum and difference matrix the left channel traditionally is the mid side...

Page 23: ...by employing bidirectional patterns oriented along the three car dinal axes lateral fore aft and vertical and then matrixing these with an omnidirectional pickup the complete spherical sound field ca...

Page 24: ...ichannel Modular Studio Microphone Stands and Booms Flightweight Stands Medium Duty Vertical Stands and Booms Heavy Duty Stands and Booms Crank up Stands Since 1983 we ve been the US agent for Coles E...

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