{"product_id":"walrus-audio-mantle-bass-pre-amp-di-black","title":"Walrus Audio Mantle Bass Pre-Amp\/DI Black","description":"\u003cp\u003e\u003cstrong\u003eWalrus Audio Mantle Bass Pre-Amp\/DI Black\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe 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.\u003c\/p\u003e\n\u003cp\u003eBuilt 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.\u003c\/p\u003e\n\u003ch3\u003eHighlights\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eCustom Sapphire input and output transformers inspired by classic Neve and API designs\u003c\/li\u003e\n\u003cli\u003eHigh-impedance JFET input for articulate, touch-sensitive response\u003c\/li\u003e\n\u003cli\u003eTransformer-balanced XLR DI with massive headroom and extended low end\u003c\/li\u003e\n\u003cli\u003eMusical Bass and Treble controls with boost, cut, and filter behaviors\u003c\/li\u003e\n\u003cli\u003eInternally boosted +24V power for clean dynamics and low-noise performance\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eBody\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eEnclosure: Die-cast metal\u003c\/li\u003e\n\u003cli\u003eFinish: Black\u003c\/li\u003e\n\u003cli\u003eDimensions: 6.09\" x 4.7\" x 2.28\" (154.78mm x 119.35mm x 57.98mm)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eHardware\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eInput: 1\/4\" TS unbalanced (Hi-Z)\u003c\/li\u003e\n\u003cli\u003eOutput: 1\/4\" TS unbalanced\u003c\/li\u003e\n\u003cli\u003eDirect Output: Male XLR, transformer-balanced\u003c\/li\u003e\n\u003cli\u003eSwitches: Active\/Passive pad, Ground lift\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eElectronics\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eCircuit Type: Fully analog, transformer-based preamp and DI\u003c\/li\u003e\n\u003cli\u003eInput Impedance: 1M Ω\u003c\/li\u003e\n\u003cli\u003eOutput Impedance: 150 Ω balanced \/ 150 Ω unbalanced\u003c\/li\u003e\n\u003cli\u003eGain Range: -6 dB to +23 dB\u003c\/li\u003e\n\u003cli\u003eEQ Boost Range: 0 dB to +15 dB\u003c\/li\u003e\n\u003cli\u003eFrequency Response: 20 Hz – 20 kHz\u003c\/li\u003e\n\u003cli\u003eNoise Floor:\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003eBalanced: -101 dBV\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eUnbalanced: -94 dBV\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eTHD @ 1 kHz, 1 Vrms: 0.04%\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eMiscellaneous\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003ePower Requirement: 9VDC, center-negative, 500 mA minimum\u003c\/li\u003e\n\u003cli\u003eInternal Voltage: Boosted to +24V\u003c\/li\u003e\n\u003cli\u003ePower Supply: Not included\u003c\/li\u003e\n\u003cli\u003eRecommended Power: Isolated supply only\u003c\/li\u003e\n\u003cli\u003eRouting: Simultaneous 1\/4\" and XLR output supported\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eWhy Buy from Tone Shop Guitars?\u003c\/h3\u003e\n\u003cp\u003eAt 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.\u003c\/p\u003e\n\u003cp\u003e.\u003c\/p\u003e","brand":"Walrus Audio","offers":[{"title":"Default Title","offer_id":47050899325185,"sku":"900-1103","price":749.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0856\/7056\/files\/WalrusAudioMantleBassPre-AmpDIBlacktd.png?v=1768334042","url":"https:\/\/www.toneshopguitars.com\/products\/walrus-audio-mantle-bass-pre-amp-di-black","provider":"Tone Shop Guitars","version":"1.0","type":"link"}