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:
382 South Abbott Ave, Milpitas, CA 95035, USA •
Left and Right sides are marked with a small L and
R near at the cable strain relief. In addition, a Red
ring marks the Right side, allowing quick
identification.
1. Jack the 3.5 mm gold plug to your sound
device with volume control at low or off level
2. Insert Right - R earphone to your right of your
ears and do the same for the other left ear.
3. Ear-tips: Try different sizes to determine the
best fit for comfort and isolation.
382 South Abbott Ave, Milpitas, CA 95035, USA •
EARPHONES WITH MICROPHONE
For models that come with a built-in microphone,
there is a call answering button. Cell phones that
support the call-answering feature allow you to push
the microphone button to answer calls and ending of
calls
Speak naturally; there is no need to bring the
microphone to the mouth.
Basic music playback
While listening to songs, you can Pause, forward
and playback a song at anytime
1. Press button once to pause the song.
2. Press button twice to forward the song
3. Press button thrice playback a song.
382 South Abbott Ave, Milpitas, CA 95035, USA •
TERMS AND CONDITIONS OF SALE
Section 0.Warranty coverage. Refer to “Nuforce Limited
Warranty” section.
Scope. These terms and conditions of sale (these “Terms”)
apply to all sales of products (the “Products”) by Nuforce
Inc. (“NuForce”), a California corporation, to buyer of the
Products ("Buyer"). These Terms (along with the specific
terms of the attached purchase order) constitute the
complete and entire agreement between the parties relating
to the subject matter hereof, and supersede any and all prior
and contemporaneous other terms or conditions, whether
oral or written, including negotiations, prior quotations and
purchase orders between the parties. These Terms may be
modified only by a writing signed and approved by an
authorized representative of NuForce. NuForce’ failure to
object to any term or condition contained in any
communication from Buyer (including in any purchase
order) shall not be deemed a waiver or modification of these
Terms. These Terms shall not be modified, supplemented,
qualified or interpreted by any trade usage or prior course of
dealing.
382 South Abbott Ave, Milpitas, CA 95035, USA •
Orders. Subject to Section 0, a contract between NuForce
and Buyer shall be formed only upon NuForce’ written
acceptance of Buyer’s order or shipment of Products to
Buyer pursuant to Buyer’s written purchase order. If
NuForce accepts by shipment, then the acceptance shall
only be for the quantity shipped.
Title and Delivery.
Title and Risk of Loss. Delivery is F.O.B. NuForce’ point
of shipment (“Delivery”). NuForce may exercise NuForce’
own discretion in selecting the method of shipment. The
risk of loss passes to Buyer upon delivery to the carrier at
NuForce’ point of shipment. NuForce retains title to the
Products until NuForce has received payment in full of all
sums due in connection with the sale of Products to Buyer.
NuForce hereby reserves and Buyer hereby grants to
NuForce a purchase money security interest in the Products
sold and the proceeds thereof, including accounts receivable,
until Buyer pays NuForce the purchase price in full.
Shipment and Delivery. Any scheduled ship date quoted is
approximate and not the essence of the contract. Claims of
late delivery are barred unless made prior to receipt of
382 South Abbott Ave, Milpitas, CA 95035, USA •
Products. Buyer’s sole remedy for delay in or failure to
deliver shall be cancellation of the applicable order.
Pricing. NuForce reserves the right to increase prices for
any unshipped Products if the cost to NuForce for supplies,
raw materials, labor or services is materially increased. The
prices quoted on the attached purchase order shall be valid
only for the period of time there indicated. All prices are
exclusive of transportation, insurance, taxes, duties and
other charges related thereto; unless NuForce receives a
certified tax exemption from Buyer prior to shipment.
Buyer agrees to indemnify, defend and hold NuForce
harmless from any loss or expense arising out of or related
to NuForce’ reliance on any tax exemption provided by
Buyer.
Payment. Except as otherwise specifically designated on
the invoice, payment shall be due and payable within 30
days from the date of the invoice. NuForce reserves the
right at any time to modify or withdraw any credit extended
to Buyer. If in NuForce’ sole discretion, NuForce may
require full or partial payment in advance of any shipment
of Product. If Buyer becomes delinquent in any payment to
NuForce, NuForce has the right to suspend performance
382 South Abbott Ave, Milpitas, CA 95035, USA •
until such delinquency is corrected. Regardless of any
statement appearing on a check in payment for Product,
NuForce’ acceptance of such check shall not constitute a
waiver of NuForce’ right to pursue the collection of any
remaining balance. NuForce reserves the right to charge a
late fee on late payments at the lesser of one and 1.5% per
month or the maximum rate allowable by law, together with
NuForce’ costs of collections including attorneys’ fees.
Acceptance. Use of the Products by Buyer or its agents, or
the failure by Buyer to reject the Products within 5 days
following Buyer’s delivery of such Products shall constitute
acceptance by the Buyer.
382 South Abbott Ave, Milpitas, CA 95035, USA •
NuForce’ Limited Warranty and Limitation of
Liabilities.
Full Refund Period. For a period of 30 days after shipment
(the “Refund Period”), Buyer may return the Products to
NuForce for a full refund. To qualify for this refund, the
Products must be returned in their original packaging and a
15% restocking fee will apply to damaged (including
blemish on product’s surface) Products.
Limited Warranty. For a period (as specified in the
Warranty Coverage section) after conclusion of the Refund
Period, NuForce warrants (i) this product against defects in
materials and workmanship, and (ii) that each Product,
unmodified and under normal use and conditions, will
substantially comply with NuForce’ applicable written
technical documentation for the Product. NuForce reserves
the right to make substitutions and modifications from time
to time in the specifications of Products sold by NuForce,
provided that such substitutions or modifications do not
materially affect overall Product performance.
Limitations. EXCEPT FOR NUFORCE’ LIMITED
WARRANTY SET FORTH IN SECTION 0 ABOVE,
382 South Abbott Ave, Milpitas, CA 95035, USA •
NUFORCE SPECIFICALLY DISCLAIMS ANY AND
ALL EXPRESS, IMPLIED OR STATUTORY
WARRANTIES, INCLUDING THE IMPLIED
WARRANTIES OF FITNESS FOR A PARTICULAR
PURPOSE, OF MERCHANTABILITY AND AGAINST
INFRINGEMENT. THE EXPRESS WARRANTY IN
SECTION 0 ABOVE SHALL EXTEND TO BUYER
ONLY AND NOT TO BUYER’S CUSTOMERS OR ANY
THIRD PARTY. NO PERSON IS AUTHORIZED TO
MAKE ANY WARRANTY OR REPRESENTATION ON
BEHALF OF NUFORCE CONCERNING THE
PRODUCTS OTHER THAN THE LIMITED
WARRANTY EXPRESSLY SET FORTH IN SECTION 0.
BUYER WILL BE SOLELY RESPONSIBLE FOR AND
WILL INDEMNIFY, DEFEND AND HOLD HARMLESS
NUFORCE FROM AND AGAINST ANY AND ALL
LIABILITIES, DAMAGES, COSTS AND EXPENSES
RELATED TO ANY WARRANTIES WITH RESPECT
TO THE PRODUCTS OTHER THAN THOSE SET
FORTH IN SECTION 0 OR ANY USE OF THE
PRODUCTS OR RESALE OF THE PRODUCTS.
Liability. With respect to any claims asserting breach of the
limited warranty set forth in Section 0, NuForce’ exclusive
382 South Abbott Ave, Milpitas, CA 95035, USA •
liability and Buyer’s sole remedy, is at NuForce’ option, to
replace or repair the defective Product or to issue credit to
Buyer for the purchase price of the Product (without
interest), provided that prior to any replacement, repair or
credit the following conditions are satisfied: (i) NuForce is
promptly notified in writing by Buyer upon discovery of
any such default; (ii) the defective Product is returned to
NuForce, transportation charges prepaid by Buyer,
accompanied by a brief statement explaining the alleged
defect; and (iii) NuForce’ examination of such Product shall
disclose to NuForce’ satisfaction that such failures did not
arise as a result of misuse, abuse, improper installation or
application, repair, alteration, or accident, or negligence in
use, storage, transportation or handling by anyone other
than NuForce. Any replacement Product will be warranted
for the remainder of the original warranty period or 30 days,
whichever is longer. NuForce shall in no event be
responsible for any labor costs, or otherwise, incurred by
Buyer incident to the replacement of any defective Product.
If NuForce determines that the returned Product conformed
to the warranties, NuForce will return the Product to Buyer
at Buyer’s expense.
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