Ribbonmics aea n8 User manual

ribbonmics & preamps since 1964
www.ribbonmics.com | tel: [phone] | fax: [phone]
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PHANTOM-POWERED RIBBON MICROPHONE
{OWNER’S MANUAL }
aea n8

{WELCOME}
Congratulations on your purchase of the AEA N8 phantom-powered
ribbon microphone and welcome to the AEA family. The AEA N8 was
designed to be the most open and natural sounding ribbon microphone
we could make. Conceived to render acoustic spaces as faithfully as
possible, the new N8 microphone excels in capturing drum overheads,
strings, classical ensembles, orchestras, and rooms. As such, it is the
ideal complement to the N22 microphone. But even when used up
close, such as on guitar and bass amps, the N8 delivers exceptional
clarity and warmth, while also taking EQ extremely well. Additionally,
the N8’s unobtrusive size and black finish is ideal for orchestral and TV
work, where microphones need to be easy to position and more or less
invisible.
Your N8 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. Proudly independent, we still
manufacture all our ribbon microphones and preamps by hand from
locally sourced parts.
We hope that the N8 will help you capture many magical performances
that touch the heart. Read this manual thoroughly to make sure that you
get the best sound and longevity from your new microphone. Please
become part of the AEA community by sharing your experiences with
the N8 via e-mail, phone or our social media channels.
Wes Dooley
President of AEA
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{TABLE OF CONTENTS}
WELCOME 2
INTRODUCTION 4
GENERAL GUIDELINES 4
APPLICATION ADVICE 5
Controlling Leakage 5
Proximity Effect 6
APPLICATION EXAMPLES 7
Drums and Percussion 7
Strings, Brass, and Reeds 8
Piano 8
Electric Guitar and Bass 9
PRECAUTIONS 9
Phantom-power 10
Wind Gusts 10
Tramp Iron 10
Microphone Positioning 11
Magnetic Stray Fields 11
SPECIFICATIONS 12
WARRANTY 14
SUPPORT 14

{INTRODUCTION}
The N8 is a side-address, phantom-powered ribbon microphone with a
bidirectional (or figure-of-8) pickup pattern. It was designed for distant
miking applications like drum overheads, rooms, strings, and classical
ensembles, but it is also well suited for up-close use. With phantom-
powered JFET electronics and a custom German transformer the N8
achieves optimal performance with a wide range of preamps ranging
from vintage high-end models to USB audio interfaces in home studio
setups. The N8 is the second member of AEA’s NUVO series. Rooted
in the RCA tradition just like other AEA ribbons, all NUVO microphones
are designed to offer a fresh approach to the ribbon transducer;
it represents Wes Dooley’s take on the evolution of the ribbon
microphone.
{GENERAL GUIDELINES}
The two sides of the N8 (front and back) are voiced exactly the
same. Keep in mind, however, that the backside has opposite polarity
compared to the front. Positive polarity is achieved by positioning the
side with the “NUVO” logo towards the sound source.
The supplied microphone clip will provide adequate vibration isolation in
most situations.
To maintain the best performance from your new AEA N8 microphone,
take note of these four basic rules:
1) Keep the microphone covered when it is not in use.
2) Always use a sturdy microphone stand.
3) Never expose the microphone to strong air turbulence.
4) Be nice to the microphone, and it will be nice to you.
1) Keeping the microphone covered when it is not in use will reduce the
possibility of damage that might result from a sudden gust of air coming
from air-conditioning or an open door or window. Place the supplied
protective bag (or a standard plastic bag) over the microphone when
it is not in use. For longer-term storage, replace the microphone in its
protective case.
4

2) While the N8 was designed to work well with all standard
microphone stands, a high-quality boom stand will still make your life
a little bit easier. If you are using a boom, make sure that it is properly
balanced and that the tripod legs are positioned appropriately to
prevent tipping.
3) Ribbon microphones can withstand very high SPL (sound pressure
levels) without difficulty, but can be damaged easily by a sudden, strong
gust of air or high levels of low frequency sound waves (like from a
kick drum or bass cabinet). This can stretch the ribbon, causing the
microphone to lose sensitivity and distort its frequency response. To
avoid possible damage, follow this simple procedure when positioning
the microphone. Put the back of your hand 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 air turbulence. When recording kick
drums or bass guitar cabinets, angle the microphone to make sure that
no wind blasts hit the ribbon head-on.
4) Your N8 is a valuable and important investment. Like any piece of
recording equipment or musical instrument, it requires common sense
and good basic care to keep it working properly. Given simple, basic
care as described above, your new microphone will perform admirably
for decades.
{APPLICATION ADVICE}
Controlling Leakage
A significant and ever-present challenge in contemporary studio
recording is minimizing “bleed” (also called “leakage” or “crosstalk”)
from nearby instruments into the various microphones. The deep nulls
of bidirectional ribbon microphones provide good rejection of unwanted
sounds, which also can be beneficial in sound reinforcement situations
where feedback is always a threat. While gobos can be effective in
isolating performers from each other, they introduce their own set of
problems - not the least of which are reflections in close proximity to
the performers and/or microphones that result in comb-filter distortions.
Because 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.
5

Because the N8 has a bidirectional pattern, it has nulls at 90° / 270°
from the principal (front) axis. Projected in three dimensions, these nulls
produce a “plane of rejection” to the sides of the microphone that can
be used effectively to reduce leakage. Simply arrange the musicians
so that nearby instruments are placed in the “null” of their neighbor’s
microphone, and vice versa. Although this does not entirely eliminate the
need for gobos, it can significantly reduce their number.
Keep in mind that a certain degree of bleed doesn’t necessarily have
to be bad. For some styles and genres it can in fact be beneficial to
embrace a little bit of bleed in order to create cohesive and natural
sounding recordings. The important thing to listen for is whether or
not other instruments that bleed into a specific instrument microphone
still sound natural. You will generally find that well-designed ribbon
microphones like the N8 capture a natural off-axis sound, which means
that bleed from other instruments can contribute to the overall sound in
a pleasing way.
Proximity Effect
Proximity effect is a characteristic of all directional microphones; it
is a rise in low-frequency response that increases at closer working
distances. While this can be used to good effect, particularly with male
voices to give them an enhanced richness and depth, the potential trade
off is reduced articulation or clarity that can result from the masking
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effect on the treble due to “excessive” bass boost.
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, but more
knowledgeable people noticed that he would bring the mic closer for
more intimate moments, and then move it farther away when he belted
out a line. This technique became known as “working the mic.”
Your N8 was designed to exhibit a balanced sound at relatively far
distances from the sound source; it works equally well placed close to
the source.
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 N8 in a variety of recording settings and by talking to experienced
musicians and engineers. As a result we suggest the following
guidelines to help you achieve optimal results when using the N8.
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.
Drum Overheads, Rooms, and Percussion
When recording drums, there are many techniques to capturing the
sound of the kit. A good starting point is to use the N8s above the
kit as a spaced pair. Try positioning them a couple of feet above the
drummer’s head with a few feet of space in between the two mics.
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. A
quick technique that can help avoid phase problems is to keep an equal
distance between the two overhead mics and the snare or kick drum.
Another popular technique to record drum overheads is to setup the
mics in a Blumlein configuration (coincident pair at 90 degree angle)
above the head 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
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room. The closer that the N8s are positioned to the drummer, the more
direct sound and less reverb will be captured by the mics.
Strings, Brass, and Reed Instruments
Because the N8 has equal treble and bass response from a far distance,
it can be placed almost anywhere without sounding thin. Feel free to
position the mic both closer and further away than you normally would
with a condenser.
When recording acoustic instruments, a good starting point is to walk
around the room while the musician is playing. When you find a spot
where you like the sound, try positioning the N8 there and move to
taste.
For solo instruments, try placing the N8 a few feet away. This will give a
very up-close and personal sound. Set the microphone above or in front
of the instrument. The height of the mic in relation to the height of the
room can have a large impact on the sound.
When positioning the N8, try aiming the backside towards a complex
wall intersection. This can capture the reverberation of the room in an
interesting way.
For bass string instruments that are bowed and plucked, placing the
N8 about a foot away will give you a very nice and defined low end. The
proximity effect of the N8 can be used to your advantage.
For instrument sections, a good starting point is to place the N8 a few
meters away where the musicians have a nice balanced sound. Blumlein
configuration positioned at a distance of 4 - 6 meters from a section can
capture the sound with a lot depth.
The N8s can also be used with great results to capture an entire
orchestra. Try positioning the mic in the same way that you would for
sections, but from a much further distance. Two N8s on a stereo bar
facing outwards at 90 degrees can give you a realistic spacial image
that will sound like you are standing in front of the orchestra.
Piano
The N8 delivers a great sound as a close-up and distant mic on both
upright and grand pianos. On an grand piano we have found two
positions to be particularly useful.
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1. Spaced pair of N8s looking at the hammers in the front. You will need
to remove the front cover of the grand piano. This position will yield a
very natural, hi-fi sound. It is common to pull the mics further out of the
piano then you would with a pair of condensers. You can change the
amount of natural room reverb by changing the distance between the
mics and piano.
2. Blumlein pair (coincident pair at 90 degree angle) of N8s positioned
on the side of the piano facing the player: one microphone pointing
towards the treble side of the piano, and the other microphone facing
towards the bass side that can result in a larger than life recording.
Electric Guitar and Bass
The N8 can handle very high sound pressure levels allowing you to
place it close to amplifiers. Watch out for wind blasts, percussive
players, and very loud bass cabinets that push air. The N8 has the least
amount of protection in it for a more open sound which means you
should be extra careful to avoid sudden blasts of wind.
Identify where the center of the speaker cone is located and place the
N8 a few inches away from the speaker pointing right at its center for
a very direct, “in-your-face” sound. This is the spot where you will get
the most high-frequency content. If it sounds too harsh, try moving the
microphone slightly off center of the speaker cone. You can also try
positioning the N8 at an angle. You will find that small differences in
positioning can make huge differences in the sound, so experiment until
you find the spot you like.
The N8 has much more proximity effect than the nearfield N22. This
can be an advantage when trying to thicken up a thin or tinny sounding
guitar.
For a more natural sound that captures the sound of the amp in your
room, try backing the microphone up a couple of feet.
{PRECAUTIONS}
Most ribbon microphones need little, if any, maintenance. Given proper
care they last for decades. Bing Crosby’s personal RCA-44BX (now in
the collection of the Pacific Pioneer Broadcasters in Hollywood) sounds
as good today as it did when he recorded his radio broadcasts in the
1940s. 9

A few simple precautions will help you to keep your AEA N8 working
well for life.
Phantom Power
Although the N8 needs a standard 48V phantom-power source to
operate, you should still make sure that phantom power is turned off
before plugging and unplugging the microphones. The loud pops that
occur when the microphone is plugged in with phantom-power engaged
can damage speakers, headphones, and ears. Since passive ribbon
microphones or other transformer-coupled microphones are particularly
sensitive to phantom-power, it is recommended to disengage phantom-
power before plugging and unplugging a habit.
Wind Gusts
A second and equally important rule is never to blow directly into a
ribbon microphone to test it. Strong air movement can stretch the
ribbon and while it may not break, it nonetheless could significantly
degrade the microphone’s performance. Using the mic outdoors
requires special care so that the wind does not damage the ribbon.
Nonetheless, using it outdoors requires special care to avoid 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 most 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 port on an electric guitar
or bass amp, a guitar being plugged (or unplugged) while the amp level
is turned fully up, an on-axis kick-drum (particularly with a port on the
front head), that are potentially damaging. If you are unsure about how
much wind is hitting the microphone, place the back of your hand where
the microphone is going to be. If you can feel significant wind blasts,
angle the microphone or use a pop screen to avoid direct hits.
Tramp Iron
Minute iron particles, sometimes known as “tramp iron,” are common
within our environment. AEA ribbon microphones contain powerful
magnets that produce strong magnetic fields. These fields can attract
any ferric metal near the microphone that, if they are small enough, can
penetrate the outer screening and work their way inside the microphone.
Over time, this “tramp iron” can build up sufficiently in the magnetic gap
to rub against the ribbon causing distortion, electrical shorts or tearing
10

of the ribbon. The best prevention is to keep the microphone covered
with the supplied plastic bag when it is not in use.
Under no circumstances should you disassemble and take the grill off of
the microphone as this could allow tramp iron to enter the narrow gap
between the ribbon and the pole pieces. Disassembling the microphone
will VOID your warranty.
Microphone Positioning
The shock-mounted clip that is supplied with the N8 microphone
was designed to keep structure-borne noise transmitted through the
microphone stand away from the low-tuned ribbon transducer. For the
shock mount to function as intended and to avoid vibration entering
the microphone through its attached cable, it is important to tie the
microphone cable to the microphone stand in a loop with a cable tie,
shoelace or string.
Magnetic Stray Fields
Ribbon microphones are fundamentally prone to picking up strong
external magnetic fields caused by light dimmers or nearby power
transformers. Guitar players will know this phenomenon from single-coil
pickups. Even though much attention was paid to suppressing such
sensitivity to external magnetic fields in the design of the N8, 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.
The high-performance magnets used in the KU4 and R44 are incredibly
strong, and a significant amount of stray magnetic field lines surround
the microphone. Avoid placing the microphone in close proximity
to hard drives, credit cards, analog tape, or any other magnetically
sensitive items to prevent any data loss. These classic ribbon mics were
designed for maximum performance in professional environments with
well-trained technicians.
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{SPECIFICATIONS}
1.38”
8.83”
1.62”
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Operating Principle:
Directional Pattern:
Frequency Range:
Maximum SPL:
Sensitivity:
Output Impedance:
Recommended Load Impedance:
Phantom Power:
Polarity:
Polar Response:
Horizontal:
Vertical:
Transducer Element Material:
Thickness:
Width:
Length:
Microphone Dimensions:
Height:
Width:
Depth:
Weight:
Shipping Weight:
Connector:
Pressure gradient transducer
Bidirectional
<20 Hz to >20 kHz
141 dB SPL (1% third harmonic > 1
kHz)
8.3 mV/Pa (at 1 kHz, no load)
92 Ωbroadband
1.0 kΩor greater
P48 phantom power, 7 mA
Pin 2 high for positive pressure at the
front of the microphone.
Native bidirectional, figure-of-8 pattern
Up to 90 dB rejection at right angles to
the front/back axis.
Level changes with angle of incidence,
but
frequency response is consistent.
Pure aluminum corrugated ribbon
1.8 µm
0.185 in (4.7 mm)
2.35 in (59.7 mm)
8.83 in (32.4 cm)
1.62 in (11.7 cm)
1.62 in (9.5 cm)
12 oz (335 g)
1 lb 13 oz (810 g)
XLR-3M

Accessories Included:
Storage/shipping case, microphone stand clip,
custom protective mic sleeve, user manual
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{WARRANTY}
Your N8 microphone comes with a one-year limited warranty on parts
and labor, shipping not included. Please see the supplied warranty card
for details.
Registering your microphone with AEA will extend the warranty to a full
three years. Simply fill out the supplied registration form and send it to:
Audio Engineering Associates
1029 N. Allen Ave
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 N8 in specific application, please
contact our customer support team at [e-mail]
To talk to a live human being, call [phone], between 8:00 -
6:00 pm PST Monday through Friday.
There are a number or audio and video recordings of various AEA
microphones online. Please visit www.ribbonmics.com
Manufactured by AEA Ribbon Mics & Preamps
1029 N. Allen Ave. Pasadena, California 91104, USA
Tel: [phone] Fax: [phone] www.ribbonmics.com