Gecko MASTERPRO HRM 1881PRO User manual

GECKO® SAFETY INSTRUCTIONS & SYMBOLS GUIDE
GECKO® SAFETY INSTRUCTIONS & SYMBOLS GUIDE
For your own safety and to avoid invalidation of the warranty, all text marked with these symbols should be
read carefully.
SYMBOLS:
SYMBOLS:
SAFETY INSTRUCTIONS:
SAFETY INSTRUCTIONS:
•To reduce the risk of electrical shock, do not remove covers. No user serviceable parts inside. Please
refer servicing to qualified personnel.
•To reduce the risk of electrical shock or fire, do not expose the equipment to rain or moisture.
•Do not impose unnecessary stress on your equipment (i.e. placing heavy objects on it, overscrewing its
mounting etc).
•Read and keep the instruction manuals in a safe place for future references.
•Do not attempt to clean the equipment with chemical solvents as this may damage the finish. Clean only
with dry cloth.
•Do not block any ventilation openings.
•Do not install near any heat sources such as radiators, heat registers, stoves, or other apparatus that
produce heat.
•Do not defeat the purpose of the polarized or grounding type plug. A polarized plug has two blades with
one wider than the other. A grounding type plug has two blades and a third grounding prong. The wide
blade or the grounding prong is provided for your safety. If the provided plug does not fit into your outlet,
consult an electrician for the replacement of the obsolete outlet.
•Protect the power cord from being walked on or pinched particularly at plugs, convenience receptacles,
and the point where they exit from the apparatus.
•Unplug the apparatus during lightning storms or when it is not in use for a long period of time.
NOTES
NOTES
Contain important information and useful tips on the operation of your equipment.
WARNING
WARNING
The lightning flash with arrowhead symbol within an equilateral triangle, is intended to
alert the user to the presence of uninsulated dangerous voltage within the product’s
enclosure that may be of sufficient magnitude to constitute a risk of electric shock.
CAUTIONS
CAUTIONS
The exclamation point within an equilateral triangle is intended to alert the user to the
presence of important operating and maintenance (servicing) instructions in thee
literature accompanying the appliance. Please read the manual carefully.
H
HEADPHONES EADPHONES SAFETY SAFETY WARNIN WARNING G
Contain important information and use useful tips on headphones outputs and monitoring
levels.
!

•Use only attachments / accessories specified by the manufacturer.
•Always shut down power supply when not in use to save energy and for prolonged lifespan.
•Exposure to extremely high noise levels may cause permanent hearing loss. Individuals vary
considerably in susceptibility to noise-induced hearing loss, but nearly everyone will lose some hearing if
exposed to sufficiently intense noise for a period of time. The U.S. Government’s Occupational Safety
and Health Administration (OSHA) has specified the permissible noise level exposures shown in the
following chart. According to OSHA, any exposure in excess of these permissible limits could result in
some hearing loss. To ensure against potentially dangerous exposure to high sound pressure levels, it is
recommended that all persons exposed to equipment capable of producing high sound pressure levels
use hearing protectors while the equipment is in operation. Ear plugs or protectors in the ear canals or
over the ears must be worn when operating the equipment in order to prevent permanent hearing loss if
exposure is in excess of the limits set forth here:
Duration/Day (Hours) dB, Sound Pressure Level (SPL) Descriptions
Below 90dB Safe zone
8.00 90 Hearing damage
6.00 92
4.00 95
3.00 97
2.00 100 Serious hearing damage
1.50 102
1.00 105
0.50 110
0.25 or less 115 Human pain threshold
GECKO MUSIC GROUP
GECKO MUSIC GROUP
71, Ubi Road 1, #05-34, Oxley BizHub, Singapore 408732.
Email: [email protected] • Website: www.geckomusic.net

FOREWORD
FOREWORD
Dear Friends,
Thank you very much for purchasing quality products by GECKO MUSIC GROUP. I am indeed very
delighted that we have journeyed this far, setting new standards in the audio and music industry while
touching and changing lives along the way!
At GECKO MUSIC GROUP we focus on developing nothing but the best professional audio equipment and
premium grade musical instruments you ever need! It has been our philosophy all this while that good sound
reproductions can be achieved at a fraction of a premium. Our engineering team is constantly doing research
and development to meet this objective. We thank God that by HIS grace, we have succeeded in developing
the revolutionary C.R.I.S.T.A.L.® Audiophile technology that is changing the way how sound is being
encoded, reproduced and managed!
On behalf of GECKO MUSIC GROUP, I would like to pledge our continuing commitment to uphold our
traditions in serving music and audio communities around the world with more value-added highest possible
quality GECKO® professional audio equipment and premium grade musical instruments!
Once again, thank you very much for your support.
Yours truly,
Daniel Foo
Founder / Chairman
GECKO MUSIC GROUP

TABLE OF CONTENTS
TABLE OF CONTENTS
INTRODUCTION 1
WHAT'S IN THE BOX 2
HEADPHONES ELEMENTS 4
CLEANING 5
SPECIFICATIONS 6
WARRANTY 7
NOTES: Congratulations on purchasing the GECKO® MAESTRO
HRM 1881PRO C.R.I.S.T.A.L.® Audiophile reference headphones!
We recommend that you take a moment and read through the manual
as it provides information that will assist you in using your unit to its
fullest potential.
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© GECKO MUSIC GROUP. All Rights Reserved.

INTRODUCTION
INTRODUCTION
The GECKO® MAESTRO HRM 1881PRO C.R.I.S.T.A.L.® Audiophile reference headphones came about
from the quest for a precise way to listen to music.
Be it listening to music at home, mixing a song in a recording studio, mastering an album in a mastering lab,
or monitoring your live performances, from the very first note you will hear vocals, musicians and instruments
in a whole new way. Voices and instruments appearing to the details as if they are playing live right in front of
you. These are not DSP effects, they are simply the natural sounds of the recording and or audio source
coming through striking emotional chords, that's MAESTRO HRM 1881PRO.
The GECKO® MAESTRO HRM 1881PRO comes as a system with high quality audiophile grade cables, a
pouch, and a headphone bag to help keep the headphones safe in your possession. Machined aluminium
construction and high quality finishes made to last a lifetime, premium grade leather wrapped memory foam
padding for a soft connection to the ears and head, and a plethora of adjustability for fit adds to your
enjoyment of music for years to come.
The GECKO® MAESTRO HRM 1881PRO is your true connection to your music!
Summary of features:
* C.R.I.S.T.A.L.® Audiophile for highly precise and natural audio reproductions;
* wide and smooth frequency response range;
* closed-back design incorporating GECKO® Double Noise Rejection (GDNR)™ technology effectively
reducing the ambient noise;
* finest soft leather wrapped headband and ear pads for long hours of wearing comfort;
* designed for audiophile music listening, studio mixing, mastering, and live monitoring applications.
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© GECKO MUSIC GROUP. All Rights Reserved.

WHAT'S IN THE BOX
WHAT'S IN THE BOX
MAESTRO HRM 1881PRO HEADPHONES:
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© GECKO MUSIC GROUP. All Rights Reserved.

CARRYING BAG WITH EMBROIDED GECKO® LOGO:
POUCH:
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© GECKO MUSIC GROUP. All Rights Reserved.

HEADPHONES ELEMENTS
HEADPHONES ELEMENTS
1. HEADBAND
Leather wrapped machined aluminium headband including length adjustment mechanism and ear cup
rotation.
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© GECKO MUSIC GROUP. All Rights Reserved.
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2. BRUSHED ALUMINIUM YOKE
Brushed aluminium yoke specially designed to fit all kind of sizes and varying shaped heads .
3. CLOSED-BACK EAR CUP
Closed-back brushed aluminium base ear cup with GECKO® Double Noise Rejection (GDNR)™ technology
effectively reducing the ambient noise.
4. REPLACEABLE EAR PADS
Leather wrapped thick memory foam cushion ear pads. These ear pads are designed to be easily
replaceable. Contact your GECKO® Authorized Reseller for genuine parts.
5. CABLE
4mmø shielded TRUTH spring cable (4m length in straight mode).
6. 6.3MM GOLD-PLATED TRS CONVERTER
6.3mm (¼”) gold-plated OLYMPIAN series TRS audiophile grade converter. Turn clockwise to tighten, and
counter-clockwise to release.
7. 3.5MM GOLD-PLATED TRS MALE CONNECTOR
3.5mm (⅛”) gold-plated OLYMPIAN series TRS audiophile grade connector.
CLEANING
CLEANING
Clean your headphones by using a damp cloth and dabbing the leather until clean, do not rub the cloth on
the leather.
Do not use cleaning detergents or leather polish, doing so may cause damage to the product.
Occasional use of leather conditioner will help prolong the life span of the leather parts on your headphones.
It is advised that you clean your headphones regularly
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© GECKO MUSIC GROUP. All Rights Reserved.

SPECIFICATIONS
SPECIFICATIONS
Element:
C.R.I.S.T.A.L.® Audiophile Dynamic
Driver Diameter:
53mmø
Noise Rejection:
GECKO® Double Noise Rejection (GDNR)™
Frequency Response:
8Hz ~ 28kHz
Phase:
Linear
Impedance:
60Ω
Sensitivity:
-102±3dB at 1kHz (0dB = 1mV/Pa)
Rated Power:
250mW
Max. Input Power:
500mW
Cable:
4mmø Shielded TRUTH Spring Cable (4m length in straight mode) with 3.5mm TRS Gold-Plated OLYMPIAN
Connector
Included Accessories:
GECKO® MAESTRO HRM 1881PRO Carrying Bag, Pouch, 3.5mm to 6.3mm Gold-Plated OLYMPIAN TRS
Converter
Physical Properties:
Body/Parts Finish: Machined Aluminium
Ear Pads/Headband: Premium Grade Leather Wrapped Memory Foam
Color: Black
Net Weight: 340g
Specifications subject to change without prior notice. Manufactured under ISO9000 certified management
system.
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© GECKO MUSIC GROUP. All Rights Reserved.

Terms of Warranty
GECKO MUSIC GROUP warrants its GECKO® products for a period of three (3) years from the original date
of purchase, in accordance to the warranty regulations described below.
What is Covered:
During the applicable warranty period, GECKO MUSIC GROUP warrants the product against defects in
materials and workmanship and against malfunctions. GECKO MUSIC GROUP will remedy all such defects
and malfunctions without charge for parts or labour if the warranty applies. In the case that other parts are
used which constitutes an improvement, GECKO MUSIC GROUP may, at its discretion, charge the customer
for the additional cost of these parts. Final determination of warranty coverage lies solely with GECKO
MUSIC GROUP.
What is Not Covered:
1. If the product needs to be modified or adapted in order to comply with applicable technical or safety
standards on a national or local level, in any country which is not the country where the product was
originally developed and manufactured, this modification/adaptation shall not be considered a defect
in material or workmanship;
2. Normal wear and tear, in particular, of faders, cross faders, potentiometers, keys/buttons, valves,
guitar/bass strings, machine heads, pick-up covers, vinyl covers, illuminants, and similar parts are
not covered by this warranty;
3. Improper handling, neglect or failure to operate the unit in compliance with the instructions given in
the user or service manuals;
4. Connection or operation of the unit in any way that does not comply with the technical or safety
regulations applicable in the country where the product is used;
5. Damages/defects caused by force of nature or any other condition that is beyond the control of
GECKO MUSIC GROUP;
6. Any repair or opening of the unit carried out by unauthorized personnel (user included) will void the
warranty;
7. Modification or removal of serial numbers.
Obtaining Warranty Service:
To return a GECKO® product for warranty service, first fill out the Online Technical Report on this website
and submit for an authorization/service number. Write the authorization/service number so that it is
prominently displayed on the outside of the shipping carton. Any products received without an
authorization/service number that is clearly visible upon arrival at the factory will be refused. Enclose proof of
the original delivery date or a copy of the original sales receipt/invoice. Enclose a description of the
suspected defect or malfunction and the condition, if any, which caused the problem. Return the product to
either GECKO MUSIC GROUP or the GECKO® Store where the purchase was made.
Warranty Shipping:
You are responsible for prepaying shipping costs F.O.B. GECKO MUSIC GROUP, Singapore. Shipped
product(s) must be properly packaged. Use original shipping cartons and packing materials where possible.
GECKO MUSIC GROUP is not responsible for damages resulting from inadequate and or improper packing.
Products received with damages due to improper packaging will be deemed out of warranty.
Products which do not meet the terms of this warranty will be repaired exclusively at the buyer’s expense.
GECKO MUSIC GROUP will inform the buyer of such circumstance. If the buyer fails to submit a written
repair order within six (6) weeks after notification, GECKO MUSIC GROUP will return the unit C.O.D. with a
separate invoice for freight and packing. Such costs will also be invoiced separately when the buyer has sent
in a written repair order.
Warranty Rights:
This warranty is exclusive and extended to the original buyer and is not transferable to anyone who may
subsequently purchase this product. No other person (apart from authorized GECKO® Stores) shall be
entitled to give any warranty promise on behalf of GECKO MUSIC GROUP.