Showing posts with label stereo. Show all posts
Showing posts with label stereo. Show all posts
Monday, April 8, 2013
Kenwood Car Stereo Car Audio
Kenwood Car Stereo Lets You Listen To The Future Of Car Audio. - This brand is a household name for every car audio enthusiast. Mention the name Kenwood car stereo and they will know what you’re talking about.

Kenwood car stereos have produced high quality consumer electronics, test equipment and communication equipment since 1946. Kenwood car stereos primarily specialize in the design, engineering and manufacture of wireless communication infrastructure but are also renowned in the production consumer mobile and home entertainment systems. Kenwood car stereos are also committed to creating the finest quality components with state of the art technologies that has earned them a huge following in the audio products scene.
At present, Kenwood car stereos have a very impressive product lineup that would make anyone drool over, whether he is an audio enthusiast or not. For the regular Joe who isn’t really into technical stuff, and is just looking for something nice to put into his ride, Kenwood car stereos offer sleek designs that will surely satisfy anyone’s craving for aesthetic. Tech-freaks and geeks will also be impressed with the specs a Kenwood car stereo has.

A lot of Kenwood car stereo units nowadays include popup LCD panels for watching VCD/DVD movies. The Kenwood KVT-717DVD 7.0” Wide, Fully Motorized In-dash Monitor DVD/WMA/MP3 Receiver is a good candidate for any situation.
• 7.0 inch Wide Color TFT Active Matrix Display
• Full-automatic Open/Close with slide and angle adjustments
• Interactive Touchscreen Control with OSD
• Audio Easy Control Mode while Playing Visual Source
• Selectable Wall Paper (6 Patterns)
• Installer/Backup Memory of Audio/Video Setup
• Maximum Output Power : 50W x 4 (MOSFET Power IC)
• 3 Preouts with 5V Pre-out Level
• 2 RCA AV Inputs / 1 RCA AV Output
• Video Input for Rear View Camera
• RGB Input for Navigation System
• System Q/ System Es+
• DVD Menu Direct Touch screen Control
• MPEG 1/2 Video files (.mpg) and JPEG files (.jpg) Playback
• Dual Zone Source & Volume Control
• DVD±R/RW Compatible
• External Media Control — iPod Ready
• Optional TV Tuner
For those who might not get what the hell all of these means, just imagine this: a really thin monitor panel that smoothly retracts and extends at the push of a remote, crystal clear movie and picture playback, all encased in a beautiful black matte finish polymer casing done with a space age design.
If all you want is a just a regular car stereo for playing CDs’, listening to mp3s or the radio, Kenwood car stereo have a lot to choose from. A good head unit would be the KDC-MP928 AAC/WMA/MP3/ CD Receiver with External Media Control.
• Auto-Slide Detachable Faceplate
• Rotary Encoder & Jog Control Knob for Easy Operation
• 4096 Color OEL Display
• Display Customize Function
• Maximum Output Power : 50W x 4 (MOSFET Power IC)
• ACDrive (Advanced Codec Drive)
• AAC/WMA/MP3 Playback
• G-Analyzer (Graphic Motion Analyzer)
• Built-in DSP : DTA/System Q(4band P-EQ)/Digital Es/SRS
WOW Digital Effect
• O.D.D. (Offset Dual Differential) D/A System for Sound Quality
• Installer/User/Backup Memory of Audio Setup
• SIRIUS Satellite Radio Ready
• HD Radio Ready
• External Media Control — iPod Ready
• Dual Zone Source & Volume Control
• AUX Input
• Gold Plated 3 Preouts with 5V Pre-output Level
The Kenwood car stereo auto slide detachable faceplate allows you to take the faceplate (one which has all the buttons) in order to prevent theft by taking away the functionality of the unit left in the car.
Sunday, April 7, 2013
Stereo Power Amplifier Circuit based on BA5417
BA5417 is a stereo amplifier IC with a lot of good features like thermal shut down, standby function, soft clipping, wide operating voltage range etc. The IC can deliver 5W per channel into 4 ohm loud speakers at 12V DC supply voltage. The BA5417 has excellent sound quality and low THD (total harmonic distortion) around 0.1% at F=1kHz; Pout=0.5W.
Setup and working of this stereo power amplifier circuit is somewhat similar to the BA5406 based stereo amplifier circuit published previously. C10 and C11 are DC decoupling capacitors which block any DC level present in the input signals. C2 and C6 couples the amplifiers left and right power outputs to the corresponding loud speakers. C1 and C5 are bootstrap capacitors.
Bootstrapping is a method in which a portion of the amplifiers is taken and applied to the input. The prime objective of bootstrapping is to improve the input impedance. Networks R1,C3 and R2,C7 are meant for improving the high frequency stability of the circuit. C4 is the power supply filter capacitor. S1 is the standby switch. C8 is a filter capacitor. R3 and R4 sets the gain of the left and right channels of the amplifier in conjunction with the 39K internal feedback resistors.
Note :
- Supply voltage range of BA5417 is from 6 to 15V DC.
- The recommended supply voltage for this circuit is 12V DC.
- The power supply must be well regulated and filtered.
- BA5417 requires a heatsink.
- The circuit can be assembled on a perf board without much degradation in performance.
Source : http://www.ecircuitslab.com/2012/07/stereo-power-amplifier-circuit-based-on.html
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