compression ratio MAZDA MODEL CX-7 2009 Owners Manual (in English)

Black plate (245,1)
CAUTION
This unit can only play MP3 files that
have an MP3 file extension (.mp3)
attached. Do not attach an MP3 file
extension to any other type file as it
could cause noise to be emitted or a
malfunction in the unit.
About ID3 Tag display
lThis unit can only display ID3 Tag
album, track and artist names that have
been input using Ver.1.0/1.1/2.2/2.3
formats. Any other data that may have
been input cannot be displayed.
lThis unit can only display English
(including numerals) one-byte
characters. Use only English (including
numerals) one-byte characters when
inputting ID3 tags. Two-byte characters
and some special symbols cannot be
displayed.
Specialized glossary
MP3
Abbreviation for“MPEG Audio Layer 3”.
A technical standard for audio
compression as decided by an ISO
(International Organization for
Standardization) MPEG working group.
Use of MP3 allows for audio data to be
compressed to approximately a tenth of
the source data size.
ISO 9660
An international standard for logical
formatting of CD-ROM files and folders.
It is divided into three separate levels
based on differences in file naming
procedures, data configuration and other
characteristics.Multi-session
A session is the complete amount of data
recorded from the beginning to the end of
a single period of CD-ROM, CD-R/CD-
RW data recording. Multi-session refers to
the existence of data from two or more
sessions on a single disc.
Sampling
Refers to the process of encoding analog
audio data at regular intervals and
converting it to digital data. The sampling
rate refers to the number of times a
sample is taken in one second and is
expressed in Hz units. Increasing the
sampling rate improves the sound quality
but also increases the data size.
Bit rate
Refers to the volume of data per second,
expressed in bps (bits per second).
Generally, the larger the number of the
transfer bit rate when compressing an
MP3 file, the more information regarding
musical reproduction it carries, and
therefore the better the sound quality.
Packet writing
A general term for the method, similar to
that used for floppy discs or hard drives,
of recording the required file in a single
increment on a CD-R and similar.
ID3 Tag
ID3 tag is a method for storing
information related to the music in an
MP3 file. Information such as track, artist
and album name can be stored. This
content can be freely edited using ID3
editing function software.
Interior Comfort
Audio System
6-23
CX-7_8Z60-EA-08D_Edition2 Page245
Friday, May 30 2008 5:28 PM
Form No.8Z60-EA-08D

Black plate (251,1)
NOTElCenterpoint®operates optimally with a 2-
channel stereo CD. MP3 audio files can be
played, however, MP3 audio files encoded
with high compression may result in poor
sound quality.
lIf you are in a mode in which the
Centerpoint®function is unavailable, such
as AM/FM, and you switch to a mode in
which the function is available, such as CD
mode, while the Centerpoint
®function is
on,“CenterPT ON”is indicated in the
display. Conversely, if you switch to a mode
in which the Centerpoint
®function is
unavailable while Centerpoint®is on or off,
“CenterPT OFF”is indicated in the
display.
lCenterpoint®is available for 2-channel
stereo audio except for AM radio/FM radio/
SIRIUS digital satellite radio.
* Centerpoint®is a registered trademark
of Bose Corporation.
BEEP setting
The beep-sound when operating the audio
system can be set on or off.
Time adjustment
Rotating the audio control dial switches
the display between 12 and 24-hour clock
time (page 6-86).
Interior Comfort
Audio System
6-29
CX-7_8Z60-EA-08D_Edition2 Page251
Friday, May 30 2008 5:28 PM
Form No.8Z60-EA-08D

Black plate (442,1)
Specifications
qEngine
Item Specification
Type DOHC-16V in-line, 4-cylinder
Bore×Stroke 87.5 × 94.0 mm (3.44 × 3.70 in)
Displacement 2,261 ml (2,261 cc, 137.9 cu in)
Compression ratio 9.5
qElectrical System
Item Classification
Battery12V-48AH/5HR MF
12V-55AH/5HR MF
Spark-plug numberL3K9 18 110A
*1
L3Y3 18 110
Spark-plug gap 0.70―0.80 mm (0.028―0.031 in)
*1 ex factory
CAUTION
When cleaning the iridium plugs, do not use a wire brush. The fine particulate
coating on the iridium alloy and platinum tips could be damaged.
qLubricant Quality
Lubricant Classification
Engine oil Refer to the recommended SAE viscosity numbers on page 8-19.
Automatic transaxle fluid JWS3309
Transfer case oil API Service GL-5 (SAE 80W-90)
Rear differential oil API Service GL-5 (SAE 80W-90)
Power steering fluid ATF M-III, M-V, or equivalent (e.g. Dexron® II)
Brake fluid SAE J1703, or FMVSS116 DOT-3
10-4
Specifications
CX-7_8Z60-EA-08D_Edition2 Page442
Friday, May 30 2008 5:29 PM
Form No.8Z60-EA-08D