Introduction
The Douk Audio T7 is a high-performance 7-band stereo equalizer and balanced XLR/RCA preamplifier designed to enhance your home audio experience. It provides precise frequency control to fine-tune audio output, compensate for speaker and room acoustics, and modify various sound sources. With support for both XLR and RCA inputs and outputs, the T7 ensures high-quality audio reproduction with excellent channel separation and a clean background. Its bypass mode allows for direct listening to the original sound without equalization, and its robust design ensures durability and optimal performance.
Package Contents
Please check the package carefully for the following items:
- 1x T7 Preamplifier
- 1x DC 12V Power Adapter
Setup
Follow these steps to connect your Douk Audio T7 to your audio system:
- Power Connection: Connect the included DC 12V power adapter to the 'DC 12V IN' port on the rear panel of the T7 and then plug it into a power outlet.
- Input Connection:
- RCA Input: Connect your audio source (e.g., CD/DVD player, MP3, phone, tablet PC, TV/set-top box, laptop/Mac/computer) to the 'RCA Input' jacks on the rear panel using RCA cables.
- Balanced XLR Input: Alternatively, connect your audio source to the 'Balanced XLR Input' ports on the rear panel using XLR cables.
- Output Connection:
- RCA Output: Connect the 'RCA Output' jacks on the rear panel to your amplifier or active speakers using RCA cables.
- Balanced XLR Output: Alternatively, connect the 'Balanced XLR Output' ports on the rear panel to your amplifier or active speakers using XLR cables.
Note: Both XLR and RCA outputs can be used simultaneously.
Operating Instructions
The Douk Audio T7 features a user-friendly front panel for easy control of your audio equalization.
- Power On/Input Selection:
- Rotate the leftmost knob to select your desired input: 'RCA' for RCA input, or 'BAL' for balanced XLR input.
- The 'OFF' position powers down the unit and activates bypass mode.
- 7-Band Equalization:
Adjust the seven frequency knobs to tailor your sound. Each knob controls a specific frequency band within a range of -6dB to +6dB:
- 64Hz Adjustment Knob: Controls the lowest bass frequencies.
- 125Hz Adjustment Knob: Controls mid-bass frequencies.
- 250Hz Adjustment Knob: Controls lower-midrange frequencies.
- 500Hz Adjustment Knob: Controls central midrange frequencies.
- 2KHz Adjustment Knob: Controls upper-midrange frequencies.
- 4KHz Adjustment Knob: Controls lower treble frequencies.
- 8KHz Adjustment Knob: Controls higher treble frequencies.
Turn a knob clockwise to boost the frequency band, and counter-clockwise to cut it.
- Bypass Mode:
When the unit is powered off (knob set to 'OFF'), the T7 enters bypass mode. This allows the audio signal to pass through without any equalization or processing, enabling you to enjoy the original sound directly.
Figure 4: Bypass Design for Original Sound
Maintenance
To ensure the longevity and optimal performance of your Douk Audio T7, please follow these maintenance guidelines:
- Cleaning: Use a soft, dry cloth to clean the exterior of the unit. Avoid using harsh chemicals, solvents, or abrasive cleaners, as these can damage the finish.
- Placement: Place the T7 on a stable, flat surface away from direct sunlight, heat sources, and excessive moisture. Ensure adequate ventilation around the unit to prevent overheating.
- Dust Protection: Keep the unit free from dust accumulation. You may use a soft brush or compressed air to gently remove dust from vents and controls.
- Cable Management: Ensure all cables are connected securely and are not under strain. Avoid bending cables sharply.
- Power Off When Not in Use: If the unit will not be used for an extended period, it is recommended to power it off and unplug the power adapter.
Troubleshooting
If you encounter any issues with your Douk Audio T7, please refer to the following common problems and solutions:
| Problem | Possible Cause | Solution |
|---|---|---|
| No sound output | Incorrect input/output selection; loose cables; power issue; source device problem. |
|
| Distorted or poor sound quality | Over-equalization; faulty cables; impedance mismatch. |
|
| Unit does not power on | Power adapter issue; power outlet problem. |
|
Specifications
| Feature | Specification |
|---|---|
| Model | Douk Audio T7 |
| Audio Input | Single-ended RCA / Balanced XLR |
| Audio Output | Single-ended RCA / Balanced XLR |
| Frequency Response | 20Hz～20KHz (±1dB) |
| Frequency Bands | 64Hz / 125Hz / 250Hz / 500Hz / 2KHz / 4KHz / 8KHz |
| RCA Input Sensitivity | 0.775Vrms |
| RCA Output Level | 1.2Vrms |
| BAL Input Sensitivity | 1.5Vrms |
| BAL Output Level | 3Vrms |
| THD (Total Harmonic Distortion) | 0.003% |
| SNR (Signal-to-Noise Ratio) | ≥104dB |
| Working Voltage | DC12V (≥1.5A) |
| Dimensions (W*D*H) | 152*126*42mm / 5.98*4.96*1.65in |
| Net Weight | 700g / 1.54lb |
| Package Weight | 1.0kg / 2.20lb |
User Tips
- No Volume Control: The T7 does not feature a dedicated volume control knob. It outputs at a rated level. Volume adjustments should be made via your connected amplifier or active speakers.
- Simultaneous Outputs: Both the XLR and RCA outputs on the T7 function simultaneously. This allows for flexible integration into systems requiring multiple output paths.
- Power Supply Included: A 12V power supply is included in the package, so you do not need to purchase one separately.
Warranty & Support
Douk Audio products are designed for reliability and performance. For any technical assistance, troubleshooting beyond this manual, or warranty inquiries, please contact Douk Audio customer support through their official channels. Please retain your proof of purchase for warranty claims.
