Ohmite Variac

$125.00 to $435.00

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Page last updated Jan 16, 2026

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We compare 600+ stores and found this item at 2 stores. Prices updated January 14, 2026.

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Radwell International

$435.00

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Surplus Sales of Nebraska

$125.00

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Description

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The Ohmite Variac is an essential component for musicians seeking precise control over their amplifier's power supply, providing a versatile solution for both practice and performance settings. This high-quality variac allows for smooth adjustments to your amp's voltage, ranging from 0 to 140 volts, giving you the ability to fine-tune your sound with ease and consistency. Whether you're looking to capture the nuances of vintage tones or simply need a reliable way to regulate your gear, the Ohmite Variac delivers with unmatched precision.

Crafted with durability in mind, this variac is built to withstand the rigors of frequent use, ensuring long-lasting performance that won't let you down. The robust design features a base mount with 2-1/8" center spacing and a sturdy 3/8" x 1-1/8" long shaft, providing a secure fit for your setup. While the unit does not include a knob or dial, these are available separately to customize your control experience.

Made in the USA, the Ohmite Variac stands out not only for its quality construction but also for its commitment to excellence in every detail. Whether you're a seasoned professional or an enthusiastic hobbyist, this variac is a valuable addition to your musical toolkit.

Key Features:

Input: 120v, 50/60 Hz
Output: 0 - 140v @ 3.5 amps
Base mount on 2-1/8" centers
3/8" x 1-1/8" long shaft
Made in the USA
No knob or dial included (available separately)

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Eddie Van Halen

Guitarist

Van Halen

Verified via Legendary Tones

First, he used an Ohmite Variac, a variable transformer that could lower or raise the voltage going into the amplifier (see photo for what a typical Variac looks like). Edward set the variac to approximately 90 volts, thereby reducing the amount of input voltage going to the amplifier (see the Marshall Super Lead article for more information about variacs and attenuators) and allowing the amp to run more reliably. A key element often not considered today when running vintage Marshall amplifiers is that many that were made for export to the U.S. were designed to run at 110 volts and current U.S. outlets run at 120 volts. As a result, while there has been much talk about the dangers of using a variac, in many applications, it obviously serves a benefit.