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Application Examples

Your ears are obviously the best judge of microphone choice and 
placement, but AEA has garnered a great deal of experience testing 
the A840 in a variety of recording settings and talking to experienced 
musicians and engineers. As a result we suggest the following 
guidelines to help you to achieve optimum results when using the A840. 

Watch the videos on our website (www.ribbonmics.com, www.
AEAsessions.com) and on our YouTube channel (www.youtube.com/
AEAribbonmics) for more tips and tricks for our microphones and 
preamps.

Vocals

Our experience with the A840 is that it sounds best on vocals when 
used at a distance of 6 to 24 inches (15-60 cm). However, you may find 
that positioning the microphone closer or further away from the singer 
yields better results depending on the voice, the room or the musical 
style. When recording at 6 inches (15 cm) or closer, it is advisable to 
have a pop filter handy. The ribbon is well protected from damaging 
plosive blasts, but to avoid noises from wind blasts, we recommend 
using a pop filter. 

If you are recording a musician who sings and plays an instrument at the 
same time, you can make use of the exceptional rejection offered by the 
90º “null” planes of the bidirectional pickup pattern to reduce the pickup 
of the instrument in the vocal microphone.

Acoustic Guitar

When recording a solo acoustic guitar a good starting point is to 
position the A840 4 to 8 inches (10-20 cm) away from the guitar 
roughly pointing at the 12th fret or where the neck meets the body. 
This placement will capture clear midrange and pick articulation with a 
balanced low end.

Since the bass response of the A840 is sensitive to the miking distance, 
try rotating the mic to use its excellent horizontal off-axis performance to 
find the “sweet spot”. Try pulling the microphone away from the guitar in 
increments of 1 to 2 inches (2-5 cm). Listen to the guitar up close and 
when you find a spot that sounds good, try putting the A840 there. Let 
your ears be your guide.

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Содержание A840

Страница 1: ...ribbonmics preamps since 1964 www ribbonmics com tel 1 626 798 9128 fax 1 626 798 2378 made in california aeaa840 PHANTOM POWERED VERSION OF THE R84 OWNER S MANUAL Revision 4 April 2016 ...

Страница 2: ...bient mic applications It s just as versatile as an R44 flattering voice strings brass and drums alike Protect it from puffs of air phantom power and tramp iron and it is nearly invulnerable Treat it well and it will last decades Your A840 microphone is 100 handcrafted in Pasadena CA AEA is a family owned company with a small crew of skilled technicians most of them being musicians themselves Prou...

Страница 3: ...trolling Leakage 6 Proximity Effect 7 APPLICATION EXAMPLES 8 Vocals 8 Acoustic Guitar 8 Electric Guitar 9 Brass Woodwinds 9 Strings 10 Piano 10 Drums Percussion 11 PRECAUTIONS 11 Phantom Power 11 Wind Gusts 12 Tramp Iron 12 Magnetic Stray Fields 13 Microphone Positioning 13 SPECIFICATIONS 14 WARRANTY 16 SUPPORT 16 ...

Страница 4: ...sed for vocals or instruments its perfor mance is intimate warm and detailed yet never harsh GENERAL GUIDELINES If using a USB or battery powered audio interface make sure the unit is capable of providing 48 volt powering IEC specifies P48 power which should be able to deliver 10 milliamps per input The phantom current draw for active AEA ribbon mics is 7 milliamps Please check the current values ...

Страница 5: ...nd where the mic will be if you can feel the motion of air on your hand place a pop filter between the microphone and the source of the wind gusts or simply pull the mic further back When recording kick drums or bass guitar cabinets angle the microphone to make sure that no wind blasts hit the microphone directly on axis from the front or back 4 Your A840 is a valuable and important investment Lik...

Страница 6: ...d or microphones that result in comb filter distortions Since gobos usually are bulky they also inhibit the ability of the musicians to hear and see each other easily Such a setup requires complex and often cumbersome headphone monitor mixes for the musicians Since the A840 is bidirectional it exhibit nulls at right angles to the principal axis These nulls produce a plane of rejection around the s...

Страница 7: ...udios Designed to accommodate distant and medium miking duties exhibits a flat frequency response when placed 3 feet 1 meter away from the source Experienced vocalists instinctively locate the proper working distances for the microphones they are using From as early as the 1930s Frank Sinatra always kept one hand on the microphone stand while singing Some joked that he simply was steadying himself...

Страница 8: ...ve a pop filter handy The ribbon is well protected from damaging plosive blasts but to avoid noises from wind blasts we recommend using a pop filter If you are recording a musician who sings and plays an instrument at the same time you can make use of the exceptional rejection offered by the 90º null planes of the bidirectional pickup pattern to reduce the pickup of the instrument in the vocal mic...

Страница 9: ...s close to each other as possible to avoid phase problems caused by sound arriving at the microphones at slightly different path lengths Make sure to listen to the combined signal summed to mono to catch potential comb filtering that could be caused by out of phase signals If you are recording with the back lobe of the A840 it is important to invert the polarity on the preamp or DAW For a more nat...

Страница 10: ...ources If you desire more ambiance texture pull the microphone further away from the source A840s in a Blumlein configuration coincident pair at 90 degree angle positioned at a distance of 10 to 15 feet 3 5 m from a string section will capture a deep and wide image For bass string instruments that are bowed and plucked placing the A840 about a foot away 0 3 0 5 m will give you a very nice and defi...

Страница 11: ...ad of the drummer with each mic pointing in a different direction This will give you a very wide image of the drums that sounds like you are in sitting center stage Both of these techniques also work well for recording the sound of the room The closer the A840s are positioned to the drummer the more direct sound and less room ambiance will be captured by the mics PRECAUTIONS Most ribbon microphone...

Страница 12: ...void wind which can damage the ribbon Indoors however it is also important to avoid serious air movement from stage curtains open windows doors or air conditioning systems High SPL sound sources do not usually pose a problem because AEA s active ribbon microphones can handle 130 dB SPL or more without difficulty It is only those explosive sources that produce a strong blast of air such as the bass...

Страница 13: ... design of the A840 it is still possible that you might encounter this problem If you should pick up a hum try rotating or moving the microphone to find a spot where the hum disappears and try eliminating potential sources of stray magnetic fields You can use the microphone to find where hum is originating Rotate the mic for maximum interference and move it back and forth to sense its direction Th...

Страница 14: ... Microphone Dimensions Height Width Depth Weight with cable Shipping Weight Connector Pressure gradient transducer Bidirectional 20 Hz to 20 kHz 141 dB SPL 1 third harmonic 1 kHz 6 3 mV Pa 44 dBv Pa into unloaded circuit 92 Ω broadband 1 0K Ω or greater P48 phantom power 7 mA Pin 2 high for positive pressure on front of microphone Native bidirectional figure of 8 pattern Up to 90 dB rejection at r...

Страница 15: ...0 60 90 120 150 180 150 120 90 60 30 10000Hz 4000Hz 2000Hz 1000Hz 500Hz 200Hz Directivity 15 Data below 200 Hz omitted due to measuring room restrictions 0 dBr is equivalent to 6 3 mV Pa at 1kHz Normalized to 0 dBr at 1kHz ...

Страница 16: ...ve Pasadena CA 91104 You may also register your AEA equipment online at http www ribbonmics com aea form php SUPPORT If you should encounter any problems with your microphone or if you have questions regarding using the A840 in specific application please contact our customer support team at support ribbonmics com To talk to a live human being call 1 626 798 9128 between 9 00 5 00 pm PST Monday th...

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