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Sound City One Hundred Master Volume (1967)

Sound City One Hundred Master Volume (1967)

This product is Vintage or Discontinued

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Page last updated Aug 10, 2025

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Description

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Unleash your guitar's true voice with the Sound City One Hundred (L100) guitar amplifier head, a powerhouse of tone and versatility for any serious musician. Celebrated for its 100-watt power output, this amplifier head is designed to deliver exceptional clarity and dynamic range whether you're on stage or in the studio. The L100 is a modern revival of classic British tone, providing the robust, vintage sound that guitarists crave. Its hand-wired design ensures meticulous craftsmanship, while the iconic Sound City circuitry offers reliable performance.

The control panel is straightforward yet comprehensive, featuring options for gain, bass, mid, treble, and presence, making it easy to dial in your ideal sound. An impedance selector allows compatibility with various speaker cabinets, making it a versatile choice for any rig setup. Built to withstand the rigors of the road, the L100 combines durable construction with timeless aesthetics—perfect for those who appreciate both form and function.

Key Features:

100-watt power output for robust sound projection
Hand-wired design for superior craftsmanship
Classic Sound City circuitry for vintage British tones
Comprehensive control panel with gain, bass, mid, treble, and presence controls
Impedance selector for compatibility with various speaker cabinets
Durable construction ideal for touring musicians
Timeless aesthetics for a classic look on stage

Product specs

Amp Type

tube

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Owner Insights

We analyzed real musician discussions from forums and Reddit to find what players love, question, and tweak about Sound City One Hundred Master Volume (1967).

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The amp uses early Hiwatt circuits, modernized by Steve Fryette, offering a unique blend of classic and updated sound.
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User experience

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Former owners regret selling due to its exceptional sound, despite its loudness not fitting their needs at the time.
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The amp's build is compared to military specifications, indicating its robust construction but heavy weight.
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Use cases and applications

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Owners note the dynamic and satisfying nature of the amp, ideal for live performances where its power can be fully utilized.
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EL34 tubes excel when the volume exceeds 60%, making them ideal for metal and blues with drive.
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Setup and maintenance

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Owners report frequent issues with high heater voltages, requiring installation of large resistors to lower them to safe levels.
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It’s common for older amps like this to need new electrolytic capacitors, as they can degrade over time, causing performance issues.
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Features and functionality

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The amp's six inputs allow users to patch similar to a synthesizer, with slave inputs providing a direct line to the power amp stage.
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Mods and upgrades

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Upgrading to 6CA7s or KT77s is recommended for those who find EL34s can't handle the amp's high voltage.
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Jimi Hendrix

Guitarist

The Isley Brothers

Verified via Soundcitysite

"In 1967 Jimi started using a Sound City stack for concert performances, it comprised one 100 watt amplifier with two 4x12" speaker cabinets."

-from "Electric Gypsy" by Shapiro and Glebeek, 1992, p. 639

Pete Townshend

Singer, Guitarist

The Who

Verified via Photo

In this photo froma Who performance in 1967 Pete can clearly be seen windmilling in front of a pair of Sound City One Hundreds (AKA L100, designed and built under contract by Dave Reeves of future Hiwatt fame, get the connection?). Starting around this time Pete started stacking his heads and spring reverb unit on a chair next to his 4x12 cabinets.