PSB M4U User manual

1
Music for You
M4U 4 In-Ear Monitor Owner’s Guide

2
INTRODUCTION
Thank you for purchasing a pair of PSB Speakers M4U 4 In-Ear Monitors, a highly developed set of dual-driver earphones that capture all the sounds from
your music collections and brings them into your personal space. Producing natural musical dynamics and precisely imaged sound, these high performance
earphones will bring you closer to the music you love.
The M4U 4 from PSB Speakers combines over four decades of audio research with true-to-nature sound quality and multi-function remote control
technology to deliver a personal music experience that will travel anywhere. PSB Speakers hopes you enjoy your purchase.
SAFETY INFORMATION
Occupational Safety Health Administration (OSHA) has issued headphone usage recommendations for maximum daily exposure and sound pressure levels
[measured in decibels (dB)]. A decibel is a unit of sound measurement that increases exponentially with volume. For example, conversational speech is
typically around 60dB, and a rock concert in a stadium is often about 110dB.
WARNING: I. Warnings or announcements may be unnoticed when you are using the headphones. You should be aware of ambient sounds while wearing
the headphones, and recognize them as needed. II. Long-term exposure to loud music may cause permanent hearing damage. III. Do not attempt to modify
this product as it could result in personal injury and/or product failure. IV. If water or other foreign substances permeate inside the device fire or electric
shock may result.
CONNECTING
Each earphone is colour marked to indicate the left (black/white) and right (red) side.
Selecting Headphone Cables
In the package, two 1.2m detachable cables are included. One cable is a standard
straight cable for regular music listening. The second cable has a moulded ear loop,
remote controls for music playback and mobile phone control on iOS devices, and an
inline microphone for talking on the phone.
Volume Level Recommended Listening
90dB 8 Hours
95dB 4 Hours
100dB 2 Hours
105dB 1 Hour
110dB 30 Minutes
115dB 15 Minutes
120dB Avoid as damage may occur
Left EarphoneRight Earphone

3
How to Connect and Detach Earphone from Cable
You may need to detach the cable from the earphones if you wish to use a different
cable or replace the cable if it becomes damaged. To avoid the cable accidently
separating from the earphone, the connector has a snug fit. Make sure the cable is
firmly attached to the earphone before use.
I. Grasp the cable near the connector and the earphone as close as possible to the
connection point.
II. Push/pull the cable and earphone straight together/apart—do not twist. Cable is a
snap fit, not threaded.
III. Listen for an audible click when connecting/disconnecting.
I V. When reattaching the cable, match the colour.
Eartip Fitting and Selection
Selecting the correct earphone tip will have a major impact on sound quality. With a proper fit and seal,
the listener will be isolated from unwanted surrounding noise and have increased bass response and better
tonal balance, and a more comfortable secure fit.
To find a fit for everyone, PSB Speakers supplies an accessory package filled with various shapes and sizes of earphone tips for finding the perfect fit. From
smallest to largest, test out each earphone tip to find the best seal and most comfortable fit for the size and shape of your ear canal. Also make sure the
headphones will stay in the ear and not fall out while being active, like running or cycling.
Fitting Tips
To know whether the earphone tip is properly sealed within your ear, insert the earphone tip into the
ear canal and try listening to ambient noises with no music playing. If there is a proper seal, the sound
will be dull and distant. If the sound is clear, the earphone tip is not properly sealed inside the ear. If the
sound can faintly be heard in the distance but pressure is felt inside the ear, the earphone tip has been
over-inserted and must be readjusted.
Silicon Eartip Insertion and Removal
I. Holding the right earphone in your right hand, pull up and back on the outer part of the ear to
open the ear canal.
II. Carefully insert the earphone (eartip first) to create a complete and comfortable seal inside the ear.
III. When done listening, slowly twist the eartip from the ear canal to break the seal and remove the
earphones.
Repeat these steps with the left earphone.
NOTE: DO NOT insert the earphone tip deep enough to plug the ear as this could result in permanent damage to the ear canal.
Comply™ Foam Eartips
Delivering maximum isolation for a superior audio excellence, the supplied Isolation Plus Tx-Series tips have an integrated Wax-Guard, preventing wax
from entering the sound port, which will diminish sound quality. They also provide amazing comfort and a stay-in-ear fit.
Inserting the Comply Premium Earphone Tip
I. First roll the tip into a thin, round cylinder.
II. Pull back and up on the ear to open the canal.
III. Gently insert the entire tip into the ear. Hold the tip in place
until it expands.

4
Changing the Comply Premium Earphone Tip
I. Twist and remove the old tip and discard it.
II. Clean earphone soundtube of any debris.
III. Securely apply the new Comply Premium Earphone Tip onto the clean, dry soundtube.
Comply recommends replacement after 3 months of regular use.
Find more information and replacement tips online at www.complyfoam.com/psb-speakers/
Connecting Earphones to Music Device
I. Connect the straight connector of the M4U cable to any device with a standard 3.5mm stereo plug (headphone jack).
II. Turn the volume down to a comfortable listening level on the device before putting on M4U headphones.
NOTE: Grasp the plug at the end of the cable and pull to disconnect. Never pull on the headphone cable to disconnect the headphones from the
music player.
Wearing the Earphones
The moulded cable with the ear loop can be worn over
the ear to help keep the earphones in place during
physical activity.
TThe standard cable can also be worn straight down
for less active listening. We also recommend using
the standard cable when connecting to in-flight
entertainment systems.
We also recommend using the standard cable when
connecting to in-flight entertainment systems.
Removing the Earphones
I. Grasp the body of the earphone and gently twist to remove.
NOTE: Do not pull on the cable to remove.

5
Connecting to In-flight Entertainment
Use the standard cable and the supplied dual 3.5mm airline adapter to connect to in-flight
entertainment systems equipped with dual output connectors.
NOTE: I. Audio output jack configurations may vary on airplanes. Airline audio may not equal
high quality heard from your home audio equipment, or a portable source.
II. PSB Speakers recommends not using these headphones as aviation communication
equipment as they are not engineered for many environmental conditions common in
commercial or non-commercial aircraft (including, but not limited to: altitude,
temperature, noise conditions, unpressurized aircraft, etc.) resulting in possible
interference to critical communications.
LISTENING
Turn the volume down to a comfortable listening level on the device before putting on M4U headphones. Each earphone is colour-coded and marked
white and red to indicate the left (black/white) and right (red) side.
Cable Management Clip Adjustment Slider
Cable Management Clip
is designed to fasten the
cable to your clothing
and help keep the cable
out of your way while
being active or when
listening to a single
headphone. It will also
reduce accidental pulling
of the earphones and
make them stay put in
your ears.
Move the adjustment slider up
or down to reduce or increase
the amount of loose cord
between the left and right
earpiece.
CONTROLLING
One of the included headphone cables has built-in remote controls for use with iOS devices. The cable is equipped with a call answer button and an in-line
microphone for effortless switching between music listening and talking. It also features music and video playback control for iPod, iPhone and iPad.
Apple Compatibility Guide
The remote and mic are supported only by iPhone (3G through 6 Plus), iPad Air 2, iPad Air, iPad, iPad (2nd through 4th generation), iPad mini (1st through
3rd generation), iPod touch (2nd through 5th generation), iPod nano (4th through 7th generation), iPod shuffle (3rd and 4th generation).
Using Apple Cable Control Features
NOTE: Functionality will vary by device. Find more information and tips on device compatibility online at www.psbspeakers.com/lounge
FUNCTION ACTION REQUIRED
Answer or End Call Press and release the centre button once to answer. Repeat to end the call and resume audio play.
Decline Incoming Call Press and hold the centre button for two seconds, then release. There will be two beeps upon release to indicate successful
operation.
Use Call Waiting To switch to an incoming call and put an in-progress call on hold, press and release the centre button. Repeat to switch
back to the previous call and put the new call on hold. To switch to an incoming call and end an in-progress call, press and
hold the centre button for two seconds. Two beeps will indicate successful operation.
Activate iOS Siri
Voice Control
Monitor Function
Press and hold the centre button for two seconds.
Play/Pause Song or Video Press and release the centre button. Repeat to resume.
Skip to Next/Previous
Song or Chapter
Press and release the centre button twice quickly to skip to the next song. To skip back a song/chapter, press the centre
button three (3) times in succession.

6
CARE AND CLEANING
For safe, sanitary use, it is essential to maintain and clean your M4U headphones periodically. However, excessive cleaning may cause damage and
jeopardize the longevity of the product. When not in use, always store headphones in the supplied protective case, and store in a clean and dry
environment. Avoid storing in extreme heat or cold temperatures and humidity, and avoid exposure to liquids.
Earphone Tip Cleaning (Silicon only)
It’s important for sound quality to make sure all eartips and soundtubes are clear of any debris or wax build-up.
For regular cleaning, firmly grip the earphone tip with one hand and the in-ear monitor with the other and carefully remove the earphone tip. Use warm
water and disinfecting soap on a damp cloth to remove residue from the earphone tip. Rinse and completely dry the earphone tips before carefully
reattaching them, making sure both earphone tips are secured to the in-ear monitors.
If heavier cleaning is required, use standard cleaning practices and never apply harmful or corrosive cleaners to the headphones.
WARNING: Never wet the speaker or electronics inside of your M4U Headphones. Water or cleaning solvents may cause irreparable damage to the
electronics inside your headphones. The M4U warranty does not cover such damage.
PROTECTING YOUR INVESTMENT
For long lasting enjoyment of your headphones, you should respect their limits and avoid excessive volume levels for music or movie playback. Excessive
volume levels can damage all headphones.
If your headphones are pushed to excessive volume levels, they could be driven into “clipping”, which could result in severe and/or permanent injury. If
using your headphones at loud levels, listen carefully for any sign of harsh, garbled midrange and diminishing intelligibility – and if detected, turn the
volume down immediately.
Environmental Protection
At the end of its useful life, this product must not be disposed of with regular household waste but must be returned to a collection point for the recycling
of electrical and electronic equipment. The symbol on the product, owner’s guide and packaging, point this out. Materials can be reused in accordance
with their markings. Through re-use, recycling of raw materials, or other forms of recycling of old products, you are making an important contribution to
the protection of our environment.
Your local administrative office can advise of the responsible waste disposal point.
FUNCTION ACTION REQUIRED
Scan Forward/Backward
Through Song or Video
Quickly in sequence, press and release, then press and hold the centre button to scan forward. To scan backward, press and
release twice, then press and hold the centre button quickly in sequence. Release when you want to stop scanning.
Control Volume Press the ( + ) button to increase volume. Press the ( - ) button to decrease volume.

7
TROUBLESHOOTING
If you require service, please visit your local authorized PSB service centre, or www.psbspeakers.com/lounge. If you have moved since your purchase, the
nearest authorized PSB dealer will be able to assist you. If the problem is not resolved, please contact us directly and provide the model name, serial
number, date of purchase, dealer name, and a detailed description of the issue.
Thank you for choosing PSB M4U Headphones. We hope this owner’s guide is useful in the operation of your new headphones and its features.
PSB Speakers
633 Granite Court
Pickering, Ontario L1W 3K1
CANADA
www.psbspeakers.com
888-772-0000 [phone]
Fax: [phone]
PROBLEM POSSIBLE CAUSE WHAT TO DO
Low volume output I. Volume set too low. I. Check that the cable is properly connected and fully inserted into the source device.
II. Increase (+) the volume to a medium level using the volume controls on the cable. Also increase
the volume of the source device.
No sound audio/
intermittent
I. Source device muted
II. Source device not
producing audio
signal.
III. Cable not correctly
connected.
I. Check the source device is powered on and playing at a medium volume level.
II. Audio output on the source device not activated (refer to device manual for instructions).
III. Check the connection of the source device to the headphone cable and change the cable where
necessary.
Audible distortion
in playback
I. Cable not correctly
connected.
I. Check the connection of the source device to the headphone cable and change the cable where
necessary.
Eartip falling out I. Eartip not properly
secured to earphone.
I. Fully remove the eartip. Pull back and up on the ear to open the canal. Gently insert the entire
earphone tip into the ear. Hold the tip in place until comfortable.
Sound is only in
one earphone
I. Cable not correctly
connected.
I. Disconnect and reconnect the cable from the earphone and/or device and make sure it is
securely connected.
Integrated controls
not functioning
properly
I. Apple device may not
be compatible/faulty.
II. Cable not correctly
connected.
I. Check the Apple compatibility guide on page 5.
II. Disconnect and reconnect the earphone to ensure the connection is secure.
III. Remove any protection case from the source device for a better connection point.