Addison, TX, United States
About this listing
Walrus Audio Mantle Bass Pre-Amp/DI Black
The Walrus Audio Mantle Bass Pre-Amp/DI is a studio-grade front-end designed to serve as a foundational tone tool for electric bass. Developed in close collaboration with Ian Martin Allison, Mantle focuses on delivering clarity, harmonic depth, and authoritative low-end through a carefully voiced, transformer-based signal path.
Built around a high-impedance JFET input stage and custom Sapphire transformers, Mantle brings together classic console-inspired character with modern headroom and flexibility. Whether used as an always-on tone shaper, a recording DI, or a live performance hub, it’s designed to present your bass in its most confident and fully realized form.
Highlights
Custom Sapphire input and output transformers inspired by classic Neve and API designs
High-impedance JFET input for articulate, touch-sensitive response
Transformer-balanced XLR DI with massive headroom and extended low end
Musical Bass and Treble controls with boost, cut, and filter behaviors
Internally boosted +24V power for clean dynamics and low-noise performance
Specifications
Body
Enclosure: Die-cast metal
Finish: Black
Dimensions: 6.09" x 4.7" x 2.28" (154.78mm x 119.35mm x 57.98mm)
Hardware
Input: 1/4" TS unbalanced (Hi-Z)
Output: 1/4" TS unbalanced
Direct Output: Male XLR, transformer-balanced
Switches: Active/Passive pad, Ground lift
Electronics
Circuit Type: Fully analog, transformer-based preamp and DI
Input Impedance: 1M Ω
Output Impedance: 150 Ω balanced / 150 Ω unbalanced
Gain Range: -6 dB to +23 dB
EQ Boost Range: 0 dB to +15 dB
Frequency Response: 20 Hz – 20 kHz
Noise Floor:
Balanced: -101 dBV
Unbalanced: -94 dBV
THD @ 1 kHz, 1 Vrms: 0.04%
Miscellaneous
Power Requirement: 9VDC, center-negative, 500 mA minimum
Internal Voltage: Boosted to +24V
Power Supply: Not included
Recommended Power: Isolated supply only
Routing: Simultaneous 1/4" and XLR output supported
Why Buy from Tone Shop Guitars?
At Tone Shop Guitars, we pride ourselves on offering a curated selection of instruments backed by knowledgeable staff and exceptional customer service. Whether you're shopping online or visiting us in person, our goal is to help you find the right guitar and deliver a top-tier experience every step of the way.
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Price$749.99
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from Addison, TX
