Roland JC-120 Owner's Manual

Pages 6

Year 1994

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Roland JC-120 Specification

The Roland JC-120 Jazz Chorus amplifier is renowned for its pristine sound quality and iconic clean tones, making it a staple in both studio and live performance settings. It features a robust 120-watt output delivered through two 12-inch speakers, providing a rich and immersive stereo sound experience. The amplifier is celebrated for its unique chorus effect, which is produced through a true stereo circuit, offering lush and spatial audio dimensions.

The JC-120 is equipped with two independent input channels, each with its own three-band equalizer, allowing for versatile tonal shaping and accommodating a wide range of musical styles. Additionally, it includes built-in vibrato and reverb effects, which enhance the amplifier's tonal palette and offer musicians further creative possibilities.

Constructed with a solid and durable design, the JC-120 is built to withstand the rigors of touring and frequent use. Its classic black tolex finish and silver grille cloth give it a timeless aesthetic appeal. The control panel is user-friendly, featuring straightforward knobs and switches for adjusting volume, treble, middle, bass, reverb, speed, and depth settings.

Connectivity options include line out jacks for direct recording or PA system integration, as well as effect loop jacks for external effect units, ensuring compatibility with a variety of performance and recording setups. The Roland JC-120 is not only a testament to Roland’s commitment to quality but also a versatile tool for musicians seeking a reliable and high-quality amplifier. Its enduring legacy and continued popularity are a testament to its exceptional sound and reliable performance capabilities.

Roland JC-120 F.A.Q.

How do I properly set up my Roland JC-120 amplifier for the first time?

To set up your Roland JC-120, first ensure all controls are set to the minimum or off position. Connect your guitar to the input jack using a standard 1/4-inch cable. Plug the amplifier into a power outlet, and switch it on. Gradually increase the volume and adjust the EQ settings to your preference.

What is the best way to achieve a clean sound on the JC-120?

For a clean sound, set the volume between 2 and 4, and adjust the treble, mid, and bass controls to 12 o'clock. Use the bright switch for extra clarity if needed. The JC-120's natural clean tone is renowned, so minimal adjustment is often required.

How can I troubleshoot if my JC-120 is not producing any sound?

First, check all cable connections and ensure the amplifier is plugged into a power source. Verify that your guitar's volume is up and the input jack is securely connected. Try different cables and guitars to rule out external issues. If the problem persists, consult a professional technician.

What maintenance steps should I regularly perform on my JC-120?

Regularly check the power and speaker cables for wear, and clean the exterior with a soft cloth. Ensure proper ventilation during use to prevent overheating. Inspect the control knobs and jacks for dust and clean them with electronic contact cleaner when necessary.

How do I use the chorus effect on the JC-120?

To activate the chorus effect, ensure the chorus/vibrato selector is set to 'Chorus'. Adjust the depth and rate controls to your preference. The JC-120's stereo chorus effect is particularly effective for creating rich, spatial tones.

What should I do if the reverb on my JC-120 isn't working?

Start by checking the reverb control settings to ensure they are not set to zero. Inspect the reverb tank connections and cables inside the amp. If the reverb tank springs are damaged, they may need to be replaced. Seek professional repair if necessary.

How can I connect external effects pedals to my JC-120?

Connect your guitar to the input of your effects pedal chain. Use a patch cable to connect the final pedal's output to the JC-120's input. For best results, consider placing modulation and time-based effects in the JC-120's effects loop, if available.

Can I use the JC-120 for bass guitar, and what settings should I use?

While the JC-120 is designed for electric guitar, it can be used for bass at low volumes. Set the bass control higher and keep the treble and mid controls lower to accommodate the bass frequencies. Monitor the speakers for any distortion or rattling.

How do I safely transport my Roland JC-120 amplifier?

Use a padded cover or case to protect the amp during transport. Secure it properly in your vehicle to prevent movement. Avoid exposing the amp to extreme temperatures or humidity levels, and handle it carefully to prevent damage to the components.

What should I do if my JC-120's speakers are producing a distorted sound?

Check the volume levels and reduce them if necessary, as high output can cause distortion. Inspect the speaker cones for damage. If distortion persists, the issue may be with the amplifier circuitry, and it is advisable to consult a professional technician.