NuForce Earphones User manual
382 South Abbott Ave, Milpitas, CA 95035, USA •
NuForce
Earphones User’s Guide
382 South Abbott Ave, Milpitas, CA 95035, USA •
IMPORTANT: LISTENING AT HIGH VOLUME
LEVELS CAN CAUSE PERMANENT DAMAGE
TO YOUR HEARING. BEFORE USE, READ ALL
WARNINGS AND INSTRUCTIONS.
To avoid hearing damage, do not prolong listening
at high volume levels. Follow guidelines established
by the U.S. Occupational Safety Health
Administration (OSHA) for maximum time
exposure at various sound pressure levels. Ignoring
these guidelines can result in permanent hearing loss.
The following table may prove helpful.
90 dB SPL for 8 hours
95 dB SPL for 4 hours
100 dB SPL for 2 hours
105 dB SPL for 1 hour
110 dB SPL for 1/2 hour
115 dB SPL for 15 minutes
120 dB SPL to be avoided altogether.
382 South Abbott Ave, Milpitas, CA 95035, USA •
A Beginner’s Guide to Good Audio
What qualities distinguish a good audio system?
Let’s start with a misconception. “Wow! I’ll bet that
can play loud!” This, or something like it, is typical
of the newcomer’s reaction to an audiophile’s setup,
particularly if the speakers are large.
Why a system’s loudness capability should be the
measure of excellence isn’t difficult to understand.
People install often quite costly sound systems in
their cars. Some of the larger specimens seem
capable of shaking their host vehicle apart. The
pavement trembles when one passes by. A club’s
sound system is in the same league: ear-splitting,
gut-wrenching, floor-buckling output. With the
exception of classical music, which is rarely ever
amplified, the same is true for most live concerts.
Domestically, the average boom box can break a
382 South Abbott Ave, Milpitas, CA 95035, USA •
lease. TV ads featuring hard-pumping woofer cones
say it all.
On actually sitting down and listening to our
hypothetical audiophile’s sound system, the
newcomer will likely say “Wow!” again, followed
this time by “It’s so clear!”
Clarity. The term takes in a host of qualities. As
strange as this may seem, one of clarity’s principal
components is silence. A silent audio system –– an
audio system that contributes little to no noise of its
own –– reveals the music all the more clearly at
listening levels from soft to loud.
Resolution likewise contributes to clarity. Imagine
two mounds of sand in bright sunlight. One mound
is mixed with mud. It’s difficult to see its individual
grains. The other mound is free of mud. You have
no trouble seeing its tiny, glittering bits. And so it is
with high-quality audio. The music shines through.
382 South Abbott Ave, Milpitas, CA 95035, USA •
Nothing muddies the sonic image. You hear the
texture of a singer’s voice almost as if she’s in the
room. Instrumental timbres allow you to distinguish
the purposeful grunge of the rockers’ guitars. Violas
differ from violins, likewise oboes from English
horns. A good sound system allows you to make
these listening distinctions.
Soundstage. Another critically important measure
of an audio system’s quality is its ability to project a
convincing soundstage. Can you perceive its width
and depth? Is it realistically proportioned? Can you
hear the venue as large or small? Is it clear to you
where the musicians perform within the soundstage?
Depending on the style of recording, our
audiophile’s sound system provides the answers.
And of course the pleasures.
Speed. An audio system’s superior speed produces
crisp, clean attacks: a violin or trumpet’s edge, a
drummer’s rim shot, a marimba’s wooden
382 South Abbott Ave, Milpitas, CA 95035, USA •
loveliness –– all those little delights that mimic live
music.
Bass. To return to trembling pavements and hard-
pumping woofer cones, the audiophile’s guest will
be pleasantly surprised to discover that a high-
quality sound system’s low end is as tuneful and
clean as the rest of the audio spectrum. Again, no
mud. Just lovely, well-defined sounds. A good audio
system aims at naturalness.
Size. Good audio is not necessarily big audio. If you
shop wisely, you need not spend a fortune to achieve
a high level of audio performance. With these
pointers as a guide, the newcomer has a good idea of
what to listen for. The least expensive NuForce
components will more than satisfy modest
applications. With our reference-grade components
serving as the culmination of all our efforts, our
entire line answers to the same ideal: accurate,
vibrant, lifelike sound.
382 South Abbott Ave, Milpitas, CA 95035, USA •
PREPARING FOR USE
We recommend that you do not exceed 50% of the
maximum volume on your audio playing device and
that you limit your use to one hour per day.
Always turn music volume down on your listening
device before inserting any earphones into your ears.
Once inserted, gradually increase the volume to a
moderate listening level. Refer to above for SPL
chart to prevent damage to your hearing.
Using any earphones at high volumes (greater than
85 dB (A)) or for extended periods of time (more
than a one hour period per day) can permanently
damage your ears.
Clean your ear tips as often as possible to avoid
infections with antiseptics but do not soak it or else
earphones can be damage.
382 South Abbott Ave, Milpitas, CA 95035, USA •
SHOULD ANY OF THESE SYMPTOMS OCCUR,
STOP USING YOUR EARPHONES AND
CONSULT A MEDICAL DOCTOR.
Ringing or buzzing in the ears
Difficulty in hearing speech
Muffling of sounds
Abnormal build up of ear wax
382 South Abbott Ave, Milpitas, CA 95035, USA •
INSERTING YOUR EARPHONES
Quality of the frequency response and sound
isolation depends on how well you insert your
earphones into your ear canal.
If you feel there is a lack of bass, try experimenting
with different ear-tips (comes in several different
sizes) to obtain better seal and sound isolation
Insert your earphones(images shown below are for
illustration only) using the following guidelines:
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