Fender Bassman 135 1979-1983 Manual

Fender Bassman 135 1979-1983 Amplifier manual cover

Pages 6

Year 1981

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Fender Bassman 135 1979-1983 Amplifier Specification

The Fender Bassman 135, produced between 1979 and 1983, is a vintage tube amplifier renowned for its robust sound and reliability. This amplifier head boasts a power output of 135 watts, driven by four 6L6GC power tubes and a trio of 12AX7 preamp tubes, delivering a powerful and clean tone that bass players appreciate for both live performances and studio recordings. Its design includes a solid-state rectifier, which enhances its reliability and performance consistency.

The Bassman 135 features a straightforward control layout that includes volume, treble, mid, and bass knobs for both its normal and bass channels, allowing for versatile tone shaping. Additionally, it offers a master volume control, which was a relatively modern feature for amplifiers of this era, providing users with the ability to achieve overdriven tones at lower volumes. The amplifier also incorporates a deep switch for extended low-end response, catering to bassists seeking more depth in their sound.

The back panel of the Bassman 135 is equipped with dual speaker outputs, an impedance selector, and a line-out for direct connection to external recording or PA equipment. Its robust construction is characterized by a classic black Tolex exterior, silver grille cloth, and metal corner protectors, ensuring durability and a timeless aesthetic appeal. Overall, the Fender Bassman 135 is celebrated for its clean headroom, warm tonal qualities, and versatile application across various musical genres.

Fender Bassman 135 1979-1983 Amplifier F.A.Q.

How do I properly set up my Fender Bassman 135 amplifier for the first time?

To set up your Fender Bassman 135, connect the amplifier to your power source and instrument. Ensure all knobs are turned down before powering on. Gradually increase the volume and adjust the EQ settings to your preference.

What are the best EQ settings for a clean bass tone on the Bassman 135?

For a clean bass tone, start with all EQ knobs (bass, mid, treble) set at 12 o'clock. Adjust bass slightly higher for depth and treble for clarity, ensuring mids complement your overall tone.

How can I troubleshoot an intermittent power issue on my Bassman 135?

Check power connections and the condition of the power cord. Inspect the fuse and replace if necessary. Ensure the tubes are firmly seated; replace any faulty tubes.

What regular maintenance does the Fender Bassman 135 require?

Regular maintenance includes checking and replacing tubes as needed, cleaning the jacks and potentiometers, and inspecting the electrical connections for any signs of wear or damage.

How do I eliminate unwanted noise or hum in my Bassman 135 amplifier?

Ensure all cables are well-shielded and grounded. Check for interference from nearby electronic devices. Inspect the tubes and replace any that are microphonic.

What are some recommended speaker configurations for the Bassman 135?

The Bassman 135 pairs well with 2x15" or 4x10" speaker cabinets. Ensure the speaker impedance matches the amplifier's output impedance for optimal performance.

How can I get a classic rock tone from my Fender Bassman 135?

For a classic rock tone, increase the gain and adjust the EQ with boosted mids and treble. Experiment with the presence control for added brightness.

Why does my Bassman 135 lose volume after playing for a while?

Volume loss might be caused by failing power tubes or a biasing issue. Check and replace tubes if necessary, and have the bias adjusted by a professional technician.

What is the proper way to replace tubes in the Bassman 135?

Turn off the amplifier and unplug it from the power source. Wait for the tubes to cool down, then carefully remove and replace them. Make sure to use compatible tubes for the Bassman 135.

How do I identify and fix a blown fuse in my Bassman 135?

Unplug the amplifier and locate the fuse holder. Remove the old fuse and inspect it for a broken filament. Replace it with a new fuse of the same rating, ensuring a proper fit.