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General| Power Output | 50W x 4 |
|---|---|
| RMS Power | 22W x 4 |
| Tuner | AM/FM |
| CD Playback | Yes |
| USB Input | Yes |
| Bluetooth | No |
| Aux Input | Yes |
| Display | LCD |
| Subwoofer Output | Yes |
| MP3 Playback | Yes |
| WMA Playback | Yes |
| Detachable Face | Yes |
| Channels | 4 |
| AAC Playback | No |
| Remote Control | Yes |
Details on Class 1 Laser Product safety precautions and warnings regarding radiation.
Important operational warnings and cautions for safe use, including volume and environmental conditions.
Instructions for attaching, detaching, resetting, and forcibly ejecting the control panel.
Guide on how to clean the unit's panel and connectors properly to avoid damage.
Information on usable CDs, discs that cannot be used, and proper disc handling procedures.
Tips for enhancing FM radio reception and restoring stereo effect.
Guide to manually preset up to 18 FM and 6 AM radio stations.
How to automatically preset up to 18 FM stations based on signal strength.
Instructions for selecting a previously preset radio station.
How to change displayed information like frequency or clock for non-RDS stations.
How to search for radio stations by programme type (PTY code).
Details on TA and NEWS Standby Reception for traffic and news alerts.
Features for automatically tuning to better signal stations or searching for programmes.
How to cycle through different display information like station name or clock.
Instructions for stopping playback and ejecting discs from the unit.
How to select tracks or folders from an MP3/WMA disc.
Guide to selecting playback modes like Repeat, Random, and Folder Random.
Connecting portable audio players and Bluetooth devices via F-AUX and R-AUX jacks.
How to select and listen to audio from connected external components.
How to select the control mode for iPod/iPhone playback (HEAD, IPOD, EXT).
How to browse menus and select tracks or folders from an iPod/iPhone.
Performing basic playback operations like track selection and fast-forwarding.
How to select playback modes like Repeat, Random, and Shuffle for iPod/iPhone.
How to change the information displayed on the unit during playback.
Details on compatible iPod/iPhone models and important usage notes.
Configuring display demonstration, clock, and 12/24 hour time format settings.
Adjusting display brightness, dimmer modes, and scrolling information display.
Detailed settings for EQ, Loudness, Volume Adjust, L/O Mode, Subwoofer, HPF, BEEP, TEL MUTING, AMP GAIN.
Configuration for SSM, AF-REG, NEWS-STBY, P-SEARCH, MONO, and IF BAND.
Instructions for installing the CR2025 battery and safety precautions.
Explanation of buttons and their functions for remote operation of the unit.
Solutions for common issues like no sound, unit not working, or radio reception problems.
Resolving problems with disc playback, MP3/WMA files, and skipping tracks.
Solutions for USB and iPod/iPhone playback errors, compatibility, and interruptions.
Details on supported file formats, bit rates, sampling frequencies, and VBR playback.
Steps to connect and pair a Bluetooth device (phone/adapter) with the unit.
Using the unit for calls, voice dialing, and managing calls via Bluetooth.
How to play audio wirelessly from a Bluetooth audio device.
Detailed specifications for the audio amplifier and tuner sections of the unit.
Specifications for USB, general operating parameters, and KD-R521 model details.
