Tube Works RT-2100 MosValve Head

5.0 (1)

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This product is Vintage or Discontinued

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Page last updated Aug 15, 2025

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Description

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Introducing the Tube Works RT-2100 MosValve Head, a potent blend of vintage tone and modern reliability. Designed for guitarists who crave the warm, natural distortion of tube-driven amps but with the consistency and low maintenance of solid-state technology, this amplifier head is an excellent addition to any rig. The MosValve technology ensures that you get the rich harmonic content and dynamic response of a tube amplifier while maintaining the durability and efficiency of a solid-state setup.

With 100 watts of power on tap, the RT-2100 MosValve Head is perfect for both small gigs and larger venues. The amp features a two-channel design, allowing for seamless switching between clean and overdriven tones. Its intuitive control layout includes separate EQ sections for each channel, offering precise tonal shaping to match your playing style. Additionally, the built-in effects loop provides flexibility in integrating your favorite pedals and effects.

Whether you're laying down tracks in the studio or rocking the stage, the Tube Works RT-2100 delivers a versatile and reliable performance every time. Its straightforward design and robust build make it a favorite among guitarists who demand quality and consistency.

Key Features:

100-watt solid-state power with MosValve technology
Two-channel design with independent EQ sections
Built-in effects loop for seamless pedal integration
Warm, tube-like distortion with solid-state reliability
Suitable for studio and live performances

Videos

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Living Room GD

I bought the Kyuss amp: This is THE sound!

Living Room GD

Tube Works RT 2100 drive sound

Szabolcs Északi

B.K Butler Tube Works MosValve RT-2100-ES Hybrid Amp Head demo

Noise Machines ATX

Entering the desert tones 🌵 (tubeworks RT-2100)

The Fuzzed & Doomed

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Owner Insights

We analyzed real musician discussions from forums and Reddit to find what players love, question, and tweak about Tube Works RT-2100 MosValve Head.

Features and functionality

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The Tube Works RT-2100 has a master volume control that allows it to be played quietly, essential for bedroom use.
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The amp includes a decade switch, which can be useful for altering tonal characteristics.
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The matching 2x12 cab features a stereo setup and a removable back panel for the top speaker, presenting unique wiring considerations for series or parallel configurations.
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The MosValve RT-2100 was popular for preamp/power amp setups in touring rigs during the late '80s and '90s, favored by artists like Jerry Cantrell for a crisper sound.
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Comparisons

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The 100W solid state power amp is roughly equivalent to a 30-40W tube amp in terms of perceived loudness.
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The RT-2100 is likened to a combo version of having a Real Tube preamp coupled with a MosValve power amp, emulating the setup of separate preamp/power amp rigs.
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Use cases and applications

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It can successfully emulate the sound styles of bands like Kyuss and Queens of the Stone Age, making it appealing for fans of that genre.
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User experience

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Owners find that the solid state power section maintains tonal integrity at low volumes, unlike some tube amps.
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The EQ section is highly malleable, allowing for versatile tonal adjustments and plug-and-play sessions.
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Known for its reliability and consistency, the RT-2100 was effectively used with low stage volumes by utilizing the preamp out to the PA and using the amp as a monitor.
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Setup and maintenance

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Owners experienced dusty conditions similar to the "Cali desert," requiring cosmetic cleaning, especially for rusty screws on handles and hardware.
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Value and pricing

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Owners have reported acquiring the amp at significant discounts during shop closures or sales, often due to sellers' uncertainty about its functional state.
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5.0 out of 5

Based on 1 Review and 1 Rating

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tim_valles

over 11 years ago

Very versatile amp head

It's a immensely loud head, solid-state power amp, tube pre, at 300 watts, it'll quash any Mesa or Marshall with the in your face kind of tone that was popular in the 90s. It's EQ is very touchy, with even the slightest adjustment of the knobs, it will affect the other two. It has an interesting knob called "Stack" which is like a saturation knob for the dirty channel. It's got spring reverb, and a nice clean channel, reminiscent of a Marshall JCM 900.

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5.0 (67)

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Pricing and availability

Description

Videos

Reviews

Owner Insights

Features and functionality

Comparisons

Use cases and applications

User experience

Setup and maintenance

Value and pricing

Very versatile amp head

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