Pure, expressive tube clean tone crafted by hand in Japan.
The TRJM Tube Preamp is a boutique, all-tube preamplifier inspired by amplifiers that pursue the ultimate beauty of clean tone. Designed by musicians for musicians, it delivers depth, clarity, and dynamic response that feels alive under your fingers.
Each TRJM is handmade in Minoh City, Osaka Prefecture, using high-end and carefully selected vintage components. Because every pedal is built by hand, no two units are exactly the same. Every TRJM Tube Preamp is created with the philosophy that it should be your one and only.
From the internal wiring to the exterior finish, Peace Hill FX places equal importance on sound, build quality, and visual beauty—reflecting Japan’s “once in a lifetime” mindset in every detail.
Tone & Character
- Boutique-inspired tube preamp focused on rich, musical clean tones
- Highly touch-responsive with natural tube warmth and clarity
- Designed to remain expressive and balanced across a wide dynamic range
- Ideal for players who value nuance, feel, and articulation
Flexible Sound Shaping
Just like its amplifier inspirations, the TRJM Tube Preamp offers powerful and intuitive tone control:
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3-band EQ with deep interaction between gain and mini switches
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Mid control for enhanced presence and note definition
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Deep switch for added low-end weight and body
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Bright switch adds high-frequency sparkle (inactive at maximum gain)
- Wide tonal range suitable for subtle shaping or more pronounced voicing
Studio & Stage Ready
- Place it at the end of your effects chain and connect to an amp’s return for a consistent tube foundation
- Works musically into the input of solid-state or transistor amplifiers
- Connect directly to speaker simulator pedals for direct or silent setups
- Excellent as a recording preamp when plugged into an audio interface
- Perfect for home recording, studio sessions, and headphone practice
Controls Overview
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GAIN – Adjusts input gain to the preamplifier
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3-Band EQ – Seamlessly interacts with gain and mini switches
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Mid – Boosts midrange presence
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Deep – Lowers the center of gravity for a deeper sound
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Bright – Adds high frequencies (disabled at maximum gain)
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MASTER – Controls overall output volume without altering tone
Handcrafted in Japan
Every TRJM Tube Preamp is manufactured entirely in Osaka Prefecture, where natural beauty and traditional craftsmanship meet modern boutique pedal design.
Power Requirements
- 12V DC, center-negative
- 500mA or higher recommended
- Tube-driven, high-voltage design that generates heat during use
