1. Introduction
Thank you for choosing the EQ-898 HIFI Digital HD Stereo Preamplifier Equalizer. This device is designed to enhance your audio experience by providing precise control over frequency bands, allowing you to fine-tune your sound to perfection. Featuring a dual 20-band graphic equalizer, Bluetooth connectivity, and support for various digital audio formats, the EQ-898 is suitable for both home audio setups and stage applications.
2. Safety Instructions
- Read all instructions before operating the device.
- Keep the device away from water, moisture, and extreme temperatures.
- Do not open the casing; refer all servicing to qualified personnel.
- Ensure proper ventilation to prevent overheating.
- Use only the specified power supply (220V 50/60Hz).
- Unplug the device during lightning storms or when unused for long periods.
3. Package Contents
Please check that all items are present:
- EQ-898 HIFI Digital HD Stereo Preamplifier Equalizer Unit
- Power Cord (220V)
- User Manual (this document)
4. Controls and Connections
4.1 Front Panel
- Tuning Sliders (Left & Right): Dual 20-band graphic equalizer sliders for adjusting low, medium, and high frequencies.
- Frequency Beat Display: Visual indicator of audio frequency activity.
- USB Flash Drive / Card Reader Slot: For inserting USB drives or memory cards to play supported audio files.
- Power Switch: Turns the unit on/off.
- Audio Input Conversion Button: Selects between different audio input sources.
- Drumming Lantern Button Song: Controls a visual effect or specific playback mode.
- Pause/Play Button: Controls media playback.
- Next Song Button: Skips to the next track.
4.2 Rear Panel
- USB Group Signal Transmission: USB input for audio signals.
- DVD Group Signal Transmission: DVD input for audio signals.
- INPUT (L/R): Stereo RCA input for connecting audio sources (e.g., CD player, mixer).
- OUTPUT (L/R): Stereo RCA output for connecting to an amplifier or recording equipment.
- REC (L/R): Stereo RCA output specifically for recording devices.
- 220V Power Cord Input: Connects to the main power supply.
5. Setup Instructions
- Placement: Place the EQ-898 on a stable, flat surface with adequate ventilation.
- Power Connection: Connect the provided 220V power cord to the power input on the rear panel of the EQ-898 and then to a suitable wall outlet.
- Audio Source Connection:
- For standard audio devices (e.g., CD player, mixer), connect their stereo RCA output to the INPUT (L/R) jacks on the rear of the EQ-898.
- For USB audio sources, connect to the USB Group Signal Transmission input.
- For DVD audio sources, connect to the DVD Group Signal Transmission input.
- Amplifier/Receiver Connection: Connect the OUTPUT (L/R) jacks on the rear of the EQ-898 to the stereo RCA input of your amplifier or receiver.
- Recording Device Connection (Optional): If you wish to record the processed audio, connect the REC (L/R) jacks on the rear of the EQ-898 to the stereo RCA input of your recording device.
- Initial Power On: Ensure all connections are secure before turning on the EQ-898 using the front panel power switch.
6. Operating Instructions
6.1 Basic Operation
- Power On: Press the Power switch on the front panel. The frequency beat display will illuminate.
- Select Input: Use the 'Audio Input conversion' button to cycle through available input sources (e.g., RCA, USB, DVD, Bluetooth).
- Play Audio: Start playback from your selected audio source. If using USB/Card Reader, insert your storage device; the unit supports WAV, APE, and MP3 formats. Use the 'Pause/Play' and 'Next Song' buttons for media control.
- Adjust Equalization: Use the 20-band graphic equalizer sliders on both the left and right channels to adjust specific frequency ranges. Move sliders up to boost frequencies and down to cut them.
- Monitor Output: Observe the 'Frequency beat display' to visualize the audio signal.
6.2 Bluetooth Pairing
To connect a Bluetooth device:
- Ensure the EQ-898 is powered on and set to Bluetooth input mode (if applicable, using the 'Audio Input conversion' button).
- On your mobile device or computer, enable Bluetooth and search for available devices.
- Select 'EQ-898' from the list of devices.
- Once paired, audio from your Bluetooth device will play through the equalizer.
7. Specifications
| Feature | Detail |
|---|---|
| Model | EQ-898 |
| Type | HIFI Digital HD Stereo Preamplifier Equalizer |
| Equalizer Bands | Dual 20-Band Graphic |
| Power Supply | 220V 50/60Hz |
| Power Consumption | 10W |
| Dimensions (W*H*D) | 430mm * 75mm * 233mm |
| Weight | 2.0 KG |
| Supported Audio Formats | WAV, APE, MP3 (via USB/Card Reader) |
| Connectivity | Bluetooth, RCA Input/Output, USB, DVD Input |
| DIY Supplies Category | Electrical |
| Electronic Component | No (as per product properties, referring to specific classification) |
| High-concerned chemical | None |
| Origin | Mainland China |
8. Maintenance
- Cleaning: Use a soft, dry cloth to clean the exterior of the unit. Do not use liquid cleaners or aerosols.
- Ventilation: Ensure that the ventilation openings are not blocked to prevent overheating.
- Storage: When not in use for extended periods, store the unit in a cool, dry place, away from direct sunlight and dust.
- Slider Care: Avoid forcing the equalizer sliders. If they become stiff, gentle movement may help, but do not apply lubricants.
9. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| No power | Power cord not connected; power outlet faulty | Check power cord connection; try a different outlet. |
| No sound output | Incorrect input selected; cables loose; amplifier off | Verify input selection; check all audio cable connections; ensure amplifier is on and set to correct input. |
| Distorted sound | Input signal too high; equalizer settings extreme | Reduce input volume from source; adjust equalizer sliders to a more neutral position. |
| Bluetooth not connecting | EQ-898 not in pairing mode; device too far | Ensure EQ-898 is in Bluetooth input mode; bring device closer; try re-pairing. |
10. User Tips
- Start with Flat Settings: When first adjusting the equalizer, set all sliders to their neutral (flat) position and make small, incremental changes to hear the effect.
- Balance Channels: Use the left and right channel sliders independently to correct any stereo imbalance or to create specific soundstage effects.
- Experiment with Presets: If the unit has preset EQ modes (not explicitly mentioned but common), experiment with them to find a sound profile you like before making manual adjustments.
- Optimal Placement: Ensure the unit is placed where its display and controls are easily accessible for real-time adjustments.
11. Warranty and Support
This product comes with a standard manufacturer's warranty. For specific warranty terms, technical support, or service inquiries, please refer to the documentation provided at the time of purchase or contact your retailer. Keep your proof of purchase for warranty claims.
