Introduction
This manual provides essential information for the safe and effective use of your Friedman JJ-Junior 1x12-inch 20-watt Tube Combo Amp. Please read these instructions thoroughly before operating the amplifier and retain them for future reference.
The Friedman JJ-Junior is a 20-watt tube combo amplifier designed to deliver a wide range of guitar tones. It features dual EL84 power tubes and a 1x12-inch speaker configuration, making it suitable for various musical applications.
Image: Front view of the Friedman JJ-Junior 1x12-inch 20-watt Tube Combo Amp. The amplifier features a black textured cabinet with a cream-colored grille cloth and a black "FRIEDMAN" logo badge in the upper left corner. A black handle is visible on top.
Safety Instructions
- Always connect the amplifier to a grounded power outlet.
- Do not expose the amplifier to rain or moisture.
- Ensure proper ventilation to prevent overheating.
- Do not remove the amplifier chassis. Refer servicing to qualified personnel.
- Avoid placing objects on top of the amplifier that could obstruct ventilation.
- Disconnect the power cord before cleaning or moving the amplifier.
Setup
Unpacking and Placement
- Carefully remove the amplifier from its packaging.
- Place the amplifier on a stable, level surface.
- Ensure there is adequate space around the amplifier for ventilation.
Connections
- Power Connection: Connect the supplied power cord to the amplifier's AC inlet and then to a grounded electrical outlet.
- Instrument Input: Connect your guitar to the "INPUT" jack on the front panel using a high-quality instrument cable.
- Effects Loop: The amplifier features an effects loop. Connect your external effects pedals to the "SEND" and "RETURN" jacks on the rear panel as needed.
- Speaker Output: The internal 1x12-inch speaker is pre-connected. If using an external speaker cabinet, ensure the impedance matches the amplifier's output and connect it to the appropriate speaker output jack.
Operating Instructions
Front Panel Controls
- Input Jack: Connect your instrument here.
- Gain Control: Adjusts the input sensitivity and amount of overdrive.
- JBE Switch: Engages a specific voicing for enhanced gain and tonal characteristics.
- Bass, Middle, Treble: Standard 3-band EQ controls to shape the amplifier's tone.
- Volume Control: Adjusts the overall output level of the amplifier.
- Presence Control: Adds brightness and cut to the high frequencies.
- Power Switch: Turns the amplifier on and off. Allow tubes to warm up for a few moments after turning on.
Basic Operation
- Ensure all connections are secure and the master volume is set to a low level.
- Flip the power switch to the "ON" position. Wait approximately 30-60 seconds for the tubes to warm up.
- Gradually increase the volume to your desired listening level.
- Experiment with the Gain, EQ, JBE switch, and Presence controls to achieve your preferred tone.
- When finished, turn the volume down, then switch the amplifier off.
Maintenance
Cleaning
- Always disconnect the power cord before cleaning.
- Use a soft, dry cloth to wipe down the exterior of the amplifier.
- Do not use abrasive cleaners or solvents, as they may damage the finish.
Tube Replacement
Vacuum tubes have a finite lifespan and will eventually need replacement. If you notice a decrease in performance, unusual noise, or loss of volume, it may be time to replace the tubes. It is recommended to have tube replacement and biasing performed by a qualified technician.
- The JJ-Junior uses dual EL84 power tubes.
- Preamp tubes are typically 12AX7s.
Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| No sound | Power cord disconnected, instrument cable faulty, volume low, speaker not connected. | Check all connections, test cables, increase volume, ensure speaker is connected. |
| Weak or distorted sound | Faulty tubes, incorrect impedance, damaged speaker. | Consult a technician for tube or speaker issues. Verify correct impedance for external cabinets. |
| Excessive hum or noise | Ground loop, faulty cables, proximity to interference sources. | Use grounded outlets, try different cables, move amplifier away from other electronics. |
If you encounter issues not listed here or if troubleshooting steps do not resolve the problem, contact Friedman customer support or a qualified service technician.
Specifications
- Model: JJ-JUNIOR COMBO
- Output Wattage: 20 Watts
- Speaker: 1 x 12-inch
- Tube Configuration: Dual EL84 power tubes, 12AX7 preamp tubes
- Channels: 2-channel
- Controls: Gain, JBE Switch, Bass, Middle, Treble, Volume, Presence
- Effects Loop: Yes
- Dimensions: 25.9 x 20.5 x 15.4 inches (65.8 x 52.1 x 39.1 cm)
- Weight: 49.2 pounds (22.3 kg)
- Power Source: Corded Electric
- Connector Type: 6.35mm Jack
Warranty and Support
For warranty information and customer support, please refer to the official Friedman Amplification website or contact your authorized Friedman dealer. Keep your proof of purchase for warranty claims.
Friedman Amplification: www.friedmanamplification.com
