Overview: The PSB M4U 8 wireless active noise cancelling
headphones are part of the Music for You (M4U)
series of high performance headphones. The M4U 8s feature an over-ear (circumaural)
design with a closed back to keep out ambient noise. Bluetooth wireless
technology lets you enjoy your music without being tethered to your phone, while
Active Noise Cancelling shuts out ambient noise so all you hear is your music.
The headphones come with an extra pair of ear pads, an audio cable,
3.5mm-to-1/4" and airline adapters, a USB charging cable, and a zippered hard
Materials: The M4U 8s feature comfortable leatherette ear
pads and headband with memory foam padding. The 40mm drivers drivers are housed
in a closed ABS/polycarbonate enclosure. The spring steel headband expands to
keep the headphones securely on your head with just the right amount of
pressure. The ear cups have a gyro-action suspension for ultimate comfort and to
help shape the headphones to your head for an airtight seal.
Bluetooth aptX HD: You can listen to music wirelessly with
Bluetooth aptX HD, which supports 48kHz/24-bit LPCM audio data for
"better-than-CD" sound. The headphones also support NFC (Near Field
Communication) for easily pairing your headphones to your NFC-enabled device by
touching the device to the N-mark, located just above the right ear cup.
Active Noise Cancelling: PSB's Active Noise Cancellation
(ANC) utilizes four microphones to pick up ambient noise from all sides and send
it to the internal headphone amplifier. The amplifier inverts the audio signal
to cancel out the noise, so all you hear is your music. While in ANC mode, you
can engage the Active Monitor (by pressing the volume button), which reduces
your current audio track by 30dB to enable you to hear your surroundings. The
surrounding audio will be amplified through the headphones, so you can carry on
a conversation without removing your headphones.
RoomFeel: PSB's exclusive RoomFeel technology makes the
headphones sound as if you are listening to your music in a room on high-quality
speakers instead of headphones. RoomFeel adds the clarity and energy produced by
a listening room, giving you the sensation of being surrounded by the music.
This "room gain" adds more realism to your listening experience, making it sound
more like a live performance.
On-board Controls: The right ear cup has the following
- Bluetooth: The Bluetooth button puts the headphones
into pairing mode for wirelessly connecting to your device.
- Volume: The volume control is a 3-way lever for turning
volume up or down. Pressing the button activates the Active Monitor.
- ANC/Active Mode: This 3-way slide switch lets you
select ANC (active noise cancelling and internal amplifier), Active Mode
(using the internal amplifier without ANC), and Passive Mode. In Passive
Mode, the Bluetooth connection will not work.
- Phone/Music Control: This 3-way lever controls both
your music playback and phone calls (when connected by Bluetooth). In music
mode, you can pause/play by pressing the button, and can slide the button
up/down for previous/next track. When a call comes in, you can answer the
call and pause your music by pressing the button. Once the call is complete,
pressing the button will end the call and resume audio play.
Audio Cable: The M4U 8 includes a 5' tangle-free audio cable
for listening to your music in passive mode. There are 3.5mm audio jacks on the
bottom of both ear cups, allowing you to plug the cable into one or the other.
In passive mode, the onboard audio controls are disabled, so you'll have to
control your music on the device. The audio cable comes with a 3.5mm-to-1/4"
adapter for use with audio equipment with a full-size headphone jack, and an
airline adapter for connecting to in-flight entertainment.
USB Cable: The included 4' USB cable has a dual purpose. You
can use it to charge the battery in your headphones by plugging it into your
computer or a USB power adapter (DC 5V, 2.4A or less). You can also listen to
audio from your computer.
Battery: The M4U 8 is equipped with a 1.2V, 750mAh
rechargeable battery for powering ANC and Active Mode. The battery charges via
USB in approximately 4 hours. Average battery life is approximately 15 hours.
The 3-position power switch will start flashing when you have approximately 1
hour of battery life remaining.
- Frequency Response:
- LF cutoff -10dB: 10Hz - 20kHz
- LF cutoff -3dB: 15Hz - 20kHz
- Within ±1.5dB: 20Hz - 20kHz
- THD (1kHz/1mW):
- ANC On: 0.5%
- ANC Off: 0.25%
- Power Handling: 30mW maximum
- Nominal Impedance: 32 ohms
- Driver Size: 40mm
- Weight: 12.3 ounces (w/o cable)
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