Walrus Audio Mantle Bass Preamp & DI | In Stock at Haggerty’s Music

Elevate your low-end foundation with the Walrus Audio Mantle, a premium preamp and DI designed specifically for the discerning electric bassist. Developed in close collaboration with bass virtuoso Ian Martin Allison, the Mantle isn't just another utility box—it is a studio-grade sonic overhaul for your instrument.

Whether you are tracking at home, performing on a world-class stage, or building your dream studio board, the Mantle provides an authoritative, harmonically rich canvas that preserves the soul of your bass while adding professional refinement.

[Order the Walrus Audio Mantle Now at Haggerty’s Music]

Iconic British & American Preamp Architecture

At the core of the Mantle are Walrus Audio’s proprietary Sapphire Transformers. This custom-wound duo offers the "best of both worlds" in analog history:

• The Input Stage: Inspired by classic Neve circuits, the input transformer delivers a massive, punchy midrange and authoritative low-end that stays clean even under high signal loads.

• The Output Stage: Modeled after the legendary API 312, the output transformer provides an airy, articulate top-end and rich harmonic saturation that helps your bass sit perfectly in any mix.

Surgical Tone Shaping with Studio Precision

Forget standard "boost/cut" knobs. The Mantle features a sophisticated dual-behavior EQ system controlled by 11-position rotary switches for 100% recallable settings:

• Musical Boosting: From positions 7–11, the EQ acts as a shelf that transitions into a broad, musical bell, offering up to +15dB of gain without the mud.

• Precision Cutting: From positions 5–1, the knobs transform into steep -18dB/octave filters. The Bass control becomes a selectable High-Pass Filter (HPF) (30Hz–120Hz), while the Treble control becomes a Low-Pass Filter (LPF) (1kHz–8kHz).

Massive Headroom & Professional Connectivity

Built to handle the hottest active pickups or the most delicate vintage passive basses, the Mantle is a powerhouse of internal engineering:

• +24V Internal Power: While it runs on a standard 9V supply, it boosts internally to +24V for staggering headroom and uncompressed dynamics.

• JFET Input Buffer: Ensures your signal stays touch-sensitive and crystal clear from the moment you plug in.

• XLR & 1/4" Outputs: Run the transformer-balanced XLR to Front of House (FOH) while simultaneously sending the 1/4" output to your stage amp.

Key Features & Specs:

• Designed with Ian Martin Allison: A DI fanatic’s dream realized.

• Gain Range: -6dB to +23dB of transformer-based warmth.

• Active/Passive Pad: -10dB input pad for high-output instruments.

• Ground Lift: Eliminate hum and buzz in complex live rigs.

• Rugged Construction: Die-cast enclosure (6.09” x 4.7” x 2.28”) built for the road.

• Power: 9VDC, 500mA (Isolated power supply recommended).

Why Buy From Haggerty’s Music?

At Haggerty’s Music, we know tone. We are proud to be an authorized Walrus Audio dealer, providing bassists with the tools they need to sound their best. When you buy the Walrus Audio Mantle from us, you get expert advice, fast shipping, and the support of a dedicated team of musicians.

Take control of your tone. Add the Walrus Audio Mantle to your rig today.