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Sunn 2000S Amplifier Head

This product is Vintage or Discontinued

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Page last updated Mar 05, 2026

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Description

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The Sunn 2000S Amplifier Head stands as a legendary icon in the world of bass amplification, known for its all-tube design that delivers a warm, vintage tone cherished by bassists across generations. Originally introduced in the late 1960s, this amp head has become synonymous with powerful sound and exceptional build quality, making it a staple in both studio settings and live performances. The Sunn 2000S offers a versatile sound palette, from crisp, clean notes to rich, overdriven tones, catering to various musical styles and preferences.

Equipped with four 6550 power tubes and a robust preamp section, the 2000S produces a hefty 120 watts of power, ensuring your bass lines cut through the mix with clarity and authority. Its straightforward control layout includes bass, mid, and treble knobs, allowing for precise tonal adjustments. The amp also features a bright switch for added high-end sparkle, making it adaptable to different environments and acoustics.

The Sunn 2000S Amplifier Head is more than just a piece of equipment; it's a testament to timeless design and superior craftsmanship. Whether you’re a seasoned professional or a passionate hobbyist, this amplifier head provides the reliability and sound quality needed to elevate your performance.

Key Features:

All-tube design with four 6550 power tubes
120 watts of power output
Bass, mid, and treble tone controls
Bright switch for enhanced high-end response
Vintage-inspired design with modern reliability
Renowned for its powerful, warm sound suitable for diverse musical styles

Videos

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D-lab Electronics

How to repair Vintage Sunn 2000s 100 watt 6550 tube guitar amp D-lab

D-lab Electronics

Jimi Hendrix Sunn 2000s. Given to Felix Pappalardi.

A. Romano

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Owner Insights

We analyzed real musician discussions from forums and Reddit to find what players love, question, and tweak about Sunn 2000S Amplifier Head.

Features and functionality

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The Sunn 2000S has a switching jack system that allows an 8-ohm cab to be used by plugging into the EXTERNAL SPEAKER jack, automatically switching both jacks to the 8-ohm tap.
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The amplifier's output transformer has taps for 4, 8, and 16 ohms, offering flexibility in speaker impedance configurations.
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The Sunn 2000S employs a Fender-style tone stack, which is inherently mid-scooped, making treble and bass settings highly interactive for achieving desired tones.
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Mods and upgrades

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Adding a 3-way impedance switch like the P-H1600-A can allow for more manual control over impedance settings, though concerns about switch failure exist.
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Setup and maintenance

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Users suggest that wiring each transformer tap to its own jack reduces the chance of user error and eliminates switch failure concerns.
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Experimenting with the bass boost and various tone stack settings is recommended, as these controls significantly impact the amp's tonal output and interaction.
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Use cases and applications

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The current configuration allows for a single 16-ohm cab or an 8-ohm cab, and two 16-ohm cabs can be used simultaneously to maintain load matching.
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User experience

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Some owners describe the tone as metallic and clanky, particularly lacking "bounce" or "life" at higher volumes, contrary to the typical Noel Redding sound expectations.
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Geddy Lee

Singer, Bassist

Rush

Verified via Guitar Lobby

According to Guitar Lobby, Geddy used Sunn 2000S.

Stephen O'Malley

Guitarist

Sunn O)))

Verified via Guitar.com | All Things Guitar

In the guitar.com's interview with Stephen O'Malley, a list of O'Malley's guitar rig was published. One of the items included on the list was Sunn 2000S.

Ron Asheton

Guitarist, Bassist

The Stooges

Verified via Vintage Guitar® magazine

For bass amps, Asheton relied on Sunn 2000s.

“It was a bigger improvement of the old Sunn 200s I had, and that was a mighty setup,” he said. “At times, I would get to use doubles [stacks] for awhile, and when you’re standing behind that, it rattles your chest, really shakes your innards up.”

Sam Kiszka

Bassist, Keyboardist

Greta Van Fleet

Verified via Premier Guitar

In a Rig Rundown with Premier Guitar, Sam Kiszka is confirmed to use a vintage Sunn 2000S Amplifier Head, capable of delivering up to 280 watts. It features a solid-state rectifier and four 6550 tubes, and it is connected to a vintage Sunn 2x15 cab.