1. Introduction
The Palmer PAN04A is an active 2-channel DI box designed to convert unbalanced, high-impedance instrument signals into balanced, low-impedance signals suitable for microphone inputs on a mixing console. This device ensures signal integrity, minimizes noise, and eliminates ground loop interference, making it ideal for both live stage performances and studio recording environments.
This manual provides essential information for the proper setup, operation, and maintenance of your Palmer PAN04A DI Box.
2. Key Features
- Active 2-channel DI box with premium balancing transformers.
- Wide frequency response of 10–40 kHz, ensuring high dynamic range.
- Switchable -30 dB input attenuation for handling high-level signals.
- Individual ground lift switch for each output to eliminate hum and noise.
- Balanced mono summed output for combining both channels.
- Robust construction suitable for demanding stage and studio use.
- Flexible power options: 9-24 V DC mains adapter or phantom power (when two outputs are connected).
3. Setup and Connections
Before connecting the PAN04A, ensure all audio equipment is powered off to prevent potential damage.
Figure 1: Top panel layout of the Palmer PAN04A DI Box, illustrating the various input, output, and control elements. This view helps identify where to connect instruments, link outputs, and connect to a mixer.
3.1 Power Supply
The PAN04A can be powered in two ways:
- DC Mains Adapter: Connect a 9-24 V DC power adapter (center positive, 100mA minimum) to the "POWER 9-24 V DC 100mA" input jack.
- Phantom Power: If two balanced outputs (Balanced Output A and Balanced Output B) are connected to a mixing console that provides phantom power (+48V), the unit will automatically draw power from the mixer.
Note: A power supply is not included with the unit and must be purchased separately if not using phantom power.
3.2 Input Connections
- INPUT A / INPUT B: Connect your instrument (e.g., guitar, bass, keyboard) to the respective 6.35 mm (1/4") input jack.
- LINK OUT A / LINK OUT B: These 6.35 mm (1/4") jacks provide a direct, unprocessed signal from the input. Use these to connect to an instrument amplifier or another device for monitoring purposes.
3.3 Output Connections
- BALANCED OUTPUT A / BALANCED OUTPUT B: Connect these XLR outputs to the microphone inputs of your mixing console. These outputs provide a balanced, low-impedance signal.
- BALANCED OUTPUT A/B (MONO): This XLR output provides a balanced, low-impedance mono sum of both Channel A and Channel B. Use this when you need to combine both channels into a single output.
4. Operation
4.1 Input Attenuation (-30 dB PAD)
Each channel features a switchable -30 dB input attenuation pad. Engage this switch if you are connecting a high-output signal source (e.g., active pickups, line-level signals) to prevent input clipping and distortion. For most passive instruments, leave the pad disengaged.
4.2 Ground Lift
Each balanced output (A and B) has a ground lift switch. If you experience hum or buzzing noise, particularly when connecting to different power sources or equipment, try engaging the ground lift switch for the affected channel. This disconnects the ground connection between the DI box and the mixer, often resolving ground loop issues.
4.3 Mono Summing
The "BALANCED OUTPUT A/B" XLR output combines the signals from both Channel A and Channel B into a single mono output. This is useful for applications where a stereo signal needs to be mixed down to mono, or when you want to send two instruments to a single mixer input.
5. Maintenance
- Cleaning: Use a soft, dry cloth to clean the exterior of the unit. Do not use abrasive cleaners, solvents, or waxes.
- Storage: Store the DI box in a cool, dry place away from direct sunlight and extreme temperatures.
- Handling: The PAN04A is built to be robust, but avoid dropping or subjecting it to severe impacts.
- No User-Serviceable Parts: There are no user-serviceable parts inside the unit. Refer all servicing to qualified personnel.
6. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| No sound output. |
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| Humming or buzzing noise. |
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| Distorted sound. |
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7. Technical Specifications
| Parameter | Value |
|---|---|
| Model | PAN04A |
| Type | Active 2-Channel DI Box |
| Frequency Response | 10 Hz – 40 kHz |
| Input Attenuation | -30 dB, switchable |
| Inputs | 2 x 6.35 mm (1/4") TS (unbalanced) |
| Link Outputs | 2 x 6.35 mm (1/4") TS (unbalanced) |
| Balanced Outputs | 2 x XLR (balanced), 1 x XLR (mono summed, balanced) |
| Controls | -30 dB PAD switch (per channel), Ground Lift switch (per balanced output) |
| Power Supply | 9-24 V DC (100mA min, center positive) or +48V Phantom Power |
| Dimensions (L x W x H) | 5.12 x 4.72 x 1.97 inches (130 x 120 x 50 mm) |
| Weight | 1.17 pounds (0.53 kg) |
| Color | Black |
8. Warranty Information
Palmer products are manufactured to high quality standards. For detailed warranty terms and conditions, please refer to the official Palmer website or contact your local distributor. Please retain your proof of purchase for any warranty claims.
9. Customer Support
Should you encounter any issues or require further assistance with your Palmer PAN04A DI Box, please contact Palmer customer support or visit the official Palmer website for FAQs and additional resources.
Palmer Official Website: www.palmer-germany.com
For Amazon-specific support or returns, please refer to your Amazon order details.
