Kenwood Glossary of Car Audio Terms

A

AAC 
Also known as m4a files, AAC are Apple format files used in CD ripping. AAC offers excellent sound quality in a smaller file size than MP3 or WMA.

ACDrive (Advance Codec Drive)
Music manager software included with many Kenwood Excelon model receivers and Kenwood model receivers. The software, called PhatNoise Music Manager, allows users to edit and rip files from a CD and manage a large list of music files. ACDrive lets you audibly, search files by Genre, Playlist, Album Name, or Artist and hear and see song files with text-to- speech capability.

A.M.S. Amplifier Management System
A.M.S. is an extremely sophisticated system that provides extensive control over an amplifier’s bass and treble EQ, bass extension and volume offset. It also allows you to control and monitor key amp performance criteria (source voltage, current consumption, internal temperature, fan speed, protection status).

All Channels-Driven Surround Power
The ability of a multi-channel receiver to deliver its rated power output in all of its channels simultaneously. All Channels-Driven Power is a realistic indication of how the receiver will be able to deliver power while playing multi-channel music formats like DVD Audio, while conventional power ratings indicate how the receiver will perform with 2-channel music sources

Attenuator with Smooth Volume Return
Drops the volume by a preset level. Smooth Volume Return gradually increases the volume to the original level when the ATT button is pressed a second time, eliminating a jarring change in volume.

Audio DSP Listening Modes
DSP (Digital Signal Processing) recreates different sonic ‘environments’, simulating the acoustics of places like Arenas, Churches, and Clubs. Playing music through a DSP mode can create a more vivid, life-like listening experience.

Auto Power On/Off
Automatically turns the power on when a signal is received; automatically puts the speaker in standby if no signal is received for several minutes.

Automatic Memory Entry
Automatically programs 1 memory band (6 stations) in a given area, making it especially easy to find stations during long-distance travel.

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B

B.M.S. (Bass Management System)
A high Q-value bass enhancement circuit featuring variable center frequency (50Hz – 100Hz) and selectable 6dB or 12dB of enhancement. The high Q-value narrows the frequency range, allowing strong bass enhancement while minimizing negative effects on the midrange.

Bass Management
Lets the user set up the system so that deep bass is sent only to those speakers designed to handle it, reducing distortion and increasing dynamic range. Full Digital Bass Management is performed digitally, allowing greater precision and user control.

Best Selection File
Lets the user program up to 32 tracks from any discs in the player for playback as a group by pushing one button.

Built-In Volume Control
A control unit on the cord allows the adjustment of volume without having to reach for the volume control on the receiver.

Butyl Rubber Surround
Butyl rubber has greater internal loss than standard urethane, preventing harmonic distortion at higher frequencies. It more efficiently absorbs edge reflections that can cause audible distortion, resulting in clearer bass performance.

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C

Camera Angle Function
When used with compatible DVDs, allows a single scene to be viewed from more than one camera angle. 

CD Text
Displays text from encoded CDs on the unit’s display. Text can include disc/song title and artist information, as well as disc genre (for example, ‘Jazz’, ‘Classical’, etc.). 

CD Track Title Display
When used with compati SEE MORE

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We service all of London Ontario plus surrounding areas such as Woodstock, Strathroy, Ingersoll On, Dorchester, Exeter, Lucan, Goderich, Bayfield, Ailsa Craig, Appin, Arkona, Aylmer, Beachville, Belmont, Clinton, Dashwood, Dutton, Glencoe, Grand Bend, Hensall, Ilderton, Kirkton, Komoka, London, Melbourne, Mitchell, Mount Brydges, Nairn, Parkhill, Port Franks, Port Stanley, St. Marys, Seaforth, Springfield, Tillsonburg, Watford, , Zurich.

Carphonix – “Where Quality Sound Meets The Road”

CarPhonix
“Where Quality Sound Meets The Road”
AUTHORIZED DEALER FOR:
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JVC
SIRIUS SATELLITE RADIO
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We specialize in: 
Car Audio  
Remote Starters/Security/Keyless Entry
Auto DetailingElectrical Troubleshooting and Repair
Electrical Troubleshooting and Repair
Window Tinting (Special full tint most vehicles $169.00)
 
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CarPhonix Is Located At:
109 Mutual St (Across From the Canadian Tire)
Ingersoll Ont
519-425-5005

We service all of London Ontario plus surrounding areas such as Woodstock, Strathroy, Ingersoll On, Dorchester, Exeter, Lucan, Goderich, Bayfield, Ailsa Craig, Appin, Arkona, Aylmer, Beachville, Belmont, Clinton, Dashwood, Dutton, Glencoe, Grand Bend, Hensall, Ilderton, Kirkton, Komoka, London, Melbourne, Mitchell, Mount Brydges, Nairn, Parkhill, Port Franks, Port Stanley, St. Marys, Seaforth, Springfield, Tillsonburg, Watford, , Zurich.

SOUND QUALITY

Sound quality is the quality of the audio output from various electronic devices. Sound quality can be defined as the degree of accuracy with which a device records or emits the original sound waves. Sound quality is also the physical pleasure or fatigue experienced by a listener.

In a live setting the skill of the musicians, the tonal quality of their instruments, and the physical traits of the venue determine sound quality.

In a playback setting, sound quality is characterized by the same traits as in a live setting but is also affected by the recording techniques and equipment used, from the microphones at the session, through the pressing at the record or compact disc factory, to the quality of electronics and speakers used to recreate the sound in a listener’s home.

Recording

For digital recording/digital playback, sound quality depends on the range of sound which is sampled, the rate at which it is sampled, and the various conversions that occur in any sound reproduction system. Withlossy codecs such as MP3 and Ogg Vorbis, sound quality is a quantifiable factor that determines how much sound data the encoder is allowed to discard in order to reduce file size. MP3-encoded sound is generally CBR, so its quality is defined by its bitrate, in kilobits per second (kbit/s). Quality of Ogg Vorbis-encoded files, which are most commonly VBR, is a decimal value ranging from –1 to 10, with –1 being suitable only for low-quality voice.

The frequency range of sound (in hertz) which the equipment is capable of sampling affects sound quality. Humans can hear frequencies ranging from about 20 Hz to approximately 20 kHz, so sampling that doesn’t extend this far will have a detrimental effect on the resultant quality.

The sound wave being recorded is an analogue wave, that is, it is continuous and has some real value at every instant. The digital quantization of the analogue sound wave means that much of the continuous sound wave is not recorded. The rate at which the sound is sampled refers to the amount of information the detection equipment records for each second of the sound. The higher the sampling frequency is, the more accurate the resultant samples will be.

The conversion of sample range and sample rate between different pieces of equipment in a sound recording and reproduction system usually lower the quality of the sound.

Bit Rate

Recorded sound is stored in many formats. The need to save space on the storage device is opposed to sound quality. The smaller the sound file for a given recording the poorer the sound quality. This is not true for lossless compression methods, where the quality is preserved also in smaller sound file sizes.

The sound quality is determined by the bit rate, which is the number of samples per second times the number of bits per sample. It also depends on number of audio channels (mono, stereomultichannel) andcompression method.

The most common are lossy compression formats as MP3, OGG Vorbis, AAC and many others. For example, MP3 files commonly have a bit rate of 128 kbit/s, because it typically offers adequate audio quality in a relatively small space. MP3 has a maximum bit rate of 320 kbit/s.

By contrast, uncompressed audio as stored on an Audio CD has a bit rate of 1,411.2 kbit/s, or four times the best MP3 can do, and twelve times that of common MP3 files.

The WAVAIFF or AU audio file formats can store audio using various bit rates, in accordance with the number of channels and compression. They often store uncompressed PCM audio with a bit rate of 1,411.2 kbit/s.

There are also lossless compression formats, such as FLACALACMonkey’s Audio and many others, which preserve quality of original uncompressed audio, but can reduce the needed storage space. Advantageously, these lossless formats can also store metadata (eg. images, title, artist, album, label, etc.) like lossy formats can, which cannot be done with pure uncompressed formats like WAV, AIFF, AU.

Delivered Audio Quality

Delivered Audio Quality, abbreviated as DAQ, is a measure of audio quality over a transmission medium. This metric is often used to quantify the quality of audio heard over a radio system. DAQ levels are defined by the following scale.

  • DAQ 1: Unusable. Speech present but not understandable.
  • DAQ 2: Speech understandable with considerable effort. Requires frequent repetition due to noise or distortion.
  • DAQ 3: Speech understandable with slight effort. Requires occasional repetition due to noise or distortion.
  • DAQ 3.4: Speech understandable without repetition. Some noise or distortion present.
  • DAQ 4: Speech easily understandable. Little noise or distortion.
  • DAQ 5: Perfect. No distortion or noise discernible.

We service all of London Ontario plus surrounding areas such as Woodstock, Strathroy, Ingersoll On, Dorchester, Exeter, Lucan, Goderich, Bayfield, Ailsa Craig, Appin, Arkona, Aylmer, Beachville, Belmont, Clinton, Dashwood, Dutton, Glencoe, Grand Bend, Hensall, Ilderton, Kirkton, Komoka, London, Melbourne, Mitchell, Mount Brydges, Nairn, Parkhill, Port Franks, Port Stanley, St. Marys, Seaforth, Springfield, Tillsonburg, Watford, , Zurich.

PSA HANDSFREE BLUETOOTH WITH DAT PHAN

We service all of London Ontario plus surrounding areas such as Woodstock, Strathroy, Ingersoll On, Dorchester, Exeter, Lucan, Goderich, Bayfield, Ailsa Craig, Appin, Arkona, Aylmer, Beachville, Belmont, Clinton, Dashwood, Dutton, Glencoe, Grand Bend, Hensall, Ilderton, Kirkton, Komoka, London, Melbourne, Mitchell, Mount Brydges, Nairn, Parkhill, Port Franks, Port Stanley, St. Marys, Seaforth, Springfield, Tillsonburg, Watford, , Zurich.