1. Introducció
The Palmer PGA04 is a specialized Direct Injection (DI) box designed for guitar applications, featuring an integrated loadbox and speaker simulation capabilities. It allows tube amplifiers with an output of up to 120 Watts to be connected directly without requiring a physical loudspeaker, making it ideal for silent recording or direct connection to mixing consoles. The unit provides both unbalanced jack and balanced XLR outputs, along with a comprehensive filter section to emulate various classic guitar loudspeaker sounds.
Figure 1: Front panel of the Palmer PGA04, showing controls for Volume, Voicing (Flat, Low, High, Colour), Hi-Cut, and Input Power indicators.
2. Característiques clau
- Speaker Simulator: Provides realistic emulation of guitar loudspeaker characteristics.
- Integrated Loadbox: Allows direct connection of tube amplifiers up to 120W without a speaker cabinet.
- DI Box Functionality: Offers both unbalanced (jack) and balanced (XLR) outputs for versatile signal routing.
- Extensive Filter Section: Includes controls for Volume, Voicing (Flat, Low, High, Colour), and Hi-Cut for tone shaping.
- Construcció robusta: Designed and manufactured in Germany for durability and reliability.
3. Configuració i connexions
Before connecting the PGA04, ensure all audio equipment is powered off. Refer to Figure 2 for a visual guide to the rear panel connections.
- AmpConnexió del lifier: Connect the speaker output of your tube amplifier (up to 120W) to the ENTRADA jack of the PGA04's LOADBOX section using a high-quality speaker cable. Ensure the amplifier's impedance matches the PGA04's 8 Ohm load.
- Speaker Thru (Optional): If you wish to use a physical speaker cabinet in conjunction with the loadbox, connect it to the PER jack in the LOADBOX section. This allows the signal to pass through to the speaker while still providing a direct output from the PGA04.
- Unbalanced Output: For connecting to guitar effects pedals, instrument inputs, or unbalanced mixer inputs, use the DESEQUILIBRATS jack output.
- Sortida equilibrada: For professional connections to mixing consoles, audio interfaces, or PA systems, use the EQUILIBRAT XLR output. This output provides a low-impedance, balanced signal, reducing noise over long cable runs.
- Ascensor de terra: If you experience hum or ground loop noise, activate the ASCENSOR GND switch next to the balanced XLR output.
Figure 2: Rear panel connections of the Palmer PGA04, including Loadbox Input/Thru and Recording Outputs.
4. Instruccions de funcionament
Once connected, you can power on your amplifier and the connected receiving device (mixer, interface, etc.). Adjust the controls on the front panel to shape your desired tone.
- VOLUM: Controls the overall output level of the simulated signal. Start with this control at a low setting and gradually increase it to avoid sudden loud signals.
- VOICING (FILTER): This section allows for detailed tonal shaping, simulating different speaker characteristics.
- PIS: Provides a neutral, uncolored response.
- BAIX: Ajusta la resposta de baixa freqüència.
- ALTA: Ajusta la resposta d'alta freqüència.
- COLOR: Adds a specific tonal character, often associated with classic guitar speakers.
- HI-CUT: This switch allows you to select between an 'OFF' position (no high-cut) and a '6kHz' position, which applies a high-frequency roll-off at 6 kHz. This can be useful for taming harsh high frequencies or simulating older speaker cabinets.
- INPUT POWER Indicators: A series of LEDs (3W, 10W, 30W, 60W, 120W) indicate the approximate power level being delivered by the connected amplifier to the loadbox. Ensure your amplifier's output does not consistently exceed the 120W rating of the PGA04.
5. Manteniment
The Palmer PGA04 is designed for robust performance and requires minimal maintenance. Follow these guidelines to ensure its longevity:
- Neteja: Feu servir un drap suau i sec per netejar l'exterior. No utilitzeu productes de neteja abrasius ni dissolvents.
- Medi ambient: Operate and store the unit in a dry environment, away from extreme temperatures, direct sunlight, and excessive dust.
- Ventilació: Ensure the ventilation slots on the unit are not obstructed to prevent overheating, especially when using the loadbox function with high-wattage ampaixecadors.
- Connexions de cable: Comproveu periòdicament totes les connexions dels cables per assegurar-vos que estiguin ben ajustades i que no presentin signes de desgast.
6. Solució De Problemes
| Problema | Causa possible | Solució |
|---|---|---|
| Sense sortida de so. | Incorrect connections, low volume setting, ampl'activador no està encès. | Verify all cables are correctly connected (refer to Section 3). Increase the VOLUME control on the PGA04. Ensure your ampEl lificador està encès i funciona. |
| Hum or buzzing noise. | Ground loop, faulty cable. | Involucrar el ASCENSOR GND switch on the rear panel. Try different cables. Ensure all equipment is on the same power circuit. |
| So distorsionat o de mala qualitat. | Input signal too hot, incorrect filter settings. | Reduce the output volume from your amplifier. Adjust the VOICING and HI-CUT controls to find a suitable tone. Ensure amplifier impedance matches PGA04 (8 Ohms). |
| La unitat es escalfa. | Normal operation under load, obstructed ventilation. | The unit may become warm during normal operation, especially when using the loadbox. Ensure ventilation slots are clear and the unit has adequate airflow. If excessively hot, reduce amplifier power or discontinue use. |
7. Especificacions
| Característica | Detall |
|---|---|
| Nom del model | PAL PGA04 |
| Tipus de producte | Speaker Simulator with Loadbox / DI Box |
| Loadbox Impedance | 8 ohms |
| Màx AmpPoder més viu | 120 watts |
| Connector d'entrada | 1/4" TS Jack (Speaker Input) |
| Thru Connector | 1/4" TS Jack (Speaker Thru) |
| Sortida desequilibrada | 1/4" TS Jack |
| Sortida equilibrada | XLR Mascle |
| Controls | Volume, Voicing (Flat, Low, High, Colour), Hi-Cut (Off/6kHz) |
| Indicadors | Input Power LEDs (3W, 10W, 30W, 60W, 120W) |
| Dimensions (L x A x A) | 18.9 x 1.77 x 7.09 polzades (aprox.) |
| Pes | 5.94 lliures (aprox.) |
| Origen | Fabricat a Alemanya |
8. Garantia i Suport
For detailed information regarding the product warranty, please refer to the official Palmer weblloc web o la targeta de garantia inclosa amb la compra. Els termes i condicions de la garantia poden variar segons la regió i el distribuïdor.
For technical support, service, or further inquiries, please visit the official Palmer weblloc web o poseu-vos en contacte amb el seu departament d'atenció al client. Normalment, podeu trobar la informació de contacte al fabricant weblloc o a l'embalatge del producte.
Official Palmer Weblloc: www.palmer-germany.com
