MASTER DYNAMIC MH40-W Wireless Over-Ear Headphones User Manual
- June 5, 2024
- MASTER DYNAMIC
Table of Contents
USER MANUAL – MH40-W
WIRELESS OVER-EAR HEADPHONES
Master & Dynamic is a New York City-based premium audio company with a deep
passion for building beautifully crafted, technically sophisticated sound
tools. Designed to be modern yet timeless, our products utilize only the
finest materials and are engineered to last, creating the perfect balance of
aesthetics, strength, comfort, and exceptional sound.
NEVER SOUND THE SAME
OVERVIEW
- Premium coated canvas Headband with Lambskin Interior
- Replaceable Memory Foam and Lambskin Ear Pads
- Adjustment Arm
- USB-C Input for Passive Audio & Charging
- Forged and Machined Aluminum Components Throughout
- Dual Microphones
SPECS
DIMENSIONS
205mm x 202mm x 71mm
WEIGHT
276g / 9.7oz
BLUETOOTH PROFILE®
Bluetooth® 5 with aptX®
IMPEDANCE
32 Ohms
DRIVERS
40mm Neodymium
High-Performance Drivers
ADJUSTABILITY, FIT AND COMFORT
FUNCTIONS
TROUBLESHOOTING
Press and hold (> 1 second) ON/OFF button to power ON. Battery level will be
displayed at startup. To conserve battery power, headphones will power OFF
after 10 minutes
of inactivity.
CHARGE
- To charge, plug in the USB-C Connector and connect to a USB-A port.
NOTE: the headphones turn off when charging.
- A solid orange light indicates charging and a solid green light indicates a full charge when the USB cable is connected.
Charging
Fully Charged
PAIRING
The first time you power ON your headphones they will enter pairing mode.
Simply connect through the Bluetooth menu on your device and select M&D MH40.
To manually activate pairing mode, power headphones OFF, then hold the ON/OFF
button for 4 or more seconds.
Pairing to 2 or More Devices
- Enter pairing mode and connect to device 1.
- Enter pairing mode again and device 1 will disconnect.
- Connect to device 2 and turn the headphones OFF.
- Turn headphones ON and headphones will automatically connect to devices 1 and 2 simultaneously.
- Pause one device and play from the other to swap headphone connections.
ACCESSORIES
REPLACING EAR PADS
Ear pads are magnetized for easy removal/replacement. Simply grab the outside ring of the ear pad and remove it. Reattach ear pads by aligning the two guide posts on the earcup with the two guide holes on the inside of the ear pad.
TROUBLESHOOTING
TROUBLE PAIRING HEADPHONES AND DEVICE
The headphones and device do not pair:
- Make sure the headphones are not connected to the charger. Cycle power switches OFF and ON.
- Turn the Bluetooth OFF, then ON again on the source device.
- Turn OFF the Bluetooth feature on any other device that is paired with the headphones.
- Hold the power button down > 5 seconds to enter pairing mode.
- Make sure “M&D MH40” is selected in the Bluetooth® device list
No audio or poor audio quality from a connected Bluetooth® device:
- Move the device closer to the headphones, physical objects between the headphone and the source may obstruct the signal.
- Try another music application or try another track.
- Try a different audio device.
**FACTORY RESET***
Power OFF the headphones. Hold the power button > 5 seconds to enter pairing
mode. Simultaneously hold the multi-function button and power button until LED
lights flash red/white. The headphones will then be reset.
MAINTENANCE
Clean ear pads and headphones with soft, slightly damp cloth. Do not soak,
submerge or allow moisture to enter near the drivers or cable jacks. Ear pads
and cables can be purchased if they are worn out at:
www.masterdynamic.com
Do not drop, sit on, or allow the headphones to be exposed to water, moisture,
or temperature extremes.
It is recommended that you return your headphones to their storage pouch when
not in use. To avoid damage, do not store other items in the canvas case along
with your headphones. CAUTION: Incorrectly rotating or over rotating the
earcups can damage the headphones.
Temperature Range Operate and store this product within the temperature range
of -4°F to 113°F (-20°C to 45°C) only. Charge the battery where the
temperature is between 41°F and 104°F (5°C and 40°C) only.
*Over time, your headphones will accumulate a list of devices and may take longer to pair than anticipated. A factory reset can help speed up this process by forgetting the list of previously connected devices.
PREVENTION OF NOISE-INDUCED HEARING LOSS
Our ability to hear is amazing. Treat your ears like the precious tools they
are, and they will continue to provide you with exceptional data, as well as a
lifetime of incredible sonic experiences.
In general, do not listen “too loud or for too long,” and be attentive to your
own ears. Ringing, discomfort, or sensitivity to high frequencies and treble
may be a signal from your ears that you are pushing them to their limits and
causing irreparable damage.
As a general practice, find what seems to be your preferred listening level
and then adjust the volume down another 10% or more. Surprisingly, your ears
will attune to a slightly lower volume over time, and what seems quiet at
first can be perfect for longer listening periods.
NIHL is a preventable condition caused by both one-time and extended exposure
to excessive decibel (dB) levels. This harm to sensitive inner ear structures
is irreversible and people of all ages can be affected. Damage can happen in a
single event or gradually over time. One-time exposure to sounds louder than
110 decibels and extended exposure to sounds over 85 decibels can cause harm.
Indicators of NIHL include hearing loss and tinnitus, a condition of sensing
constant ringing, buzzing or roaring. The NIDCD (National Institute on
Deafness and Other Communication Disorders) offers this simple rule of thumb:
avoid sound exposure that is “too loud, too close or too long.” Here are some
general references to sound levels that occur in everyday life: refrigerator
humming (45 dB); normal conversation (60 dB); city traffic (85 dB);
motorcycles (95 dB); an MP3 player at full volume (105 dB); sirens (120 dB);
firecrackers (150 dB).
WARRANTY + CUSTOMER SERVICE
Master & Dynamic guarantees this product against defects in materials or workmanship for a period of one year from the date of original purchase on our website or from an authorized Master & Dynamic retailer or reseller. Batteries are also guaranteed for proper functioning for a period of one year from the date of original purchase. Defective batteries are covered by Master & Dynamic’s Limited Warranty but battery wear from normal use is not covered. If returned within the warranty period, Master & Dynamic will at its discretion either repair the defective product or replace it with a repaired or refurbished product of identical specifications as the returned product. This limited warranty is in lieu of all other warranties, expressed or implied, including, but not limited to, any implied warranty of merchantability or fitness for a particular purpose. Master & Dynamic shall have no liability of any kind for any direct, indirect, incidental or consequential damages or expenses that arise from the use of this product, including use-related damage to the product’s exterior. Master & Dynamic’s Limited Warranty does not cover normal wear and tear to items such as blown drivers, battery degradation from normal use, cut cords, bent jacks, damage to the product’s exterior, or loss or theft. Replaceable parts subject to wear and tear such as ear tips, ear pads, and cables will be replaced only in case of malfunctioning due to material or manufacturing defects, and only once during the warranty period of your product.
The serial number and proof of purchase are required in order to enact the warranty for products purchased on our website or from an authorized retailer or reseller. This policy is also applicable to products received as a gift. If we need to replace your product due to a battery defect, your product will be new or equivalent to new in performance and reliability. You will void your warranty if you disassemble your product or expose them to excessive moisture. If you believe your product is defective within the warranty period, please contact us at [email protected]. Please include your product’s serial number, proof of purchase, telephone number, and full return shipping address in your message to us. Conditional to serial number, proof of purchase, and warranty validity, you will be issued a return authorization and instructions for the return shipment. Please note that the dispatch of a replacement product will take place after our receipt of the defective product. For questions regarding your product’s warranty, please contact Master & Dynamic Support at [email protected].