MarkBass Little Mark IV 300 Bass Amp Head

The Markbass Little Mark IV 300 is the smart, highly portable choice for bassists who crave flagship Markbass tone, reliability, and modern architecture without needing the overkill power of a 500W setup. Succeeding the industry-standard Little Mark III, this compact 300W RMS powerhouse packs massive headroom, an incredibly low noise floor, and pristine dynamic response into a frame that weighs a mere 2.2 kg (4.85 lbs).
At the heart of the Little Mark IV 300 is an upgraded Bi-band Limiter, which responds faster and more musically to aggressive playing techniques like hard popping and slap than standard limiters. The comprehensive tone-shaping layout includes a highly intuitive 4-band analog EQ, an Old School vintage filter to roll off brittle highs, a front-panel Mute switch, and a 3-way EQ preset selector (Flat/Scooped-Mid/FSW). Whether it’s driven in rehearsals, small club stages, or as a reliable backup rig, it represents the modern absolute standard for elite portable backlines.
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Key Features
• 300W Solid-State Headroom: Pumps out a punchy, ultra-clean 300W RMS at 4 Ohms (150W at 8 Ohms), perfect for club gigs, rehearsals, and studio monitoring.
• Next-Gen Bi-Band Limiter: Faster dynamic tracking stops transient distortion instantly while preserving the organic breath and touch of your fingerstyle attacks.
• 3-Way Rotary EQ Selector: Seamlessly jump between an ultra-linear Flat voicing, a heavily Scooped-Mid slap mode, or an FSW footswitch-controlled toggle circuit.
• Old School Vintage Filter: Smoothly rounds out top-end bite on demand to perfectly recreate a warm, vintage tube-amp character.
• Front-Panel Mute Control: Instantly silence your rig for rapid instrument changes or silent on-stage tuning breaks.
• Featherweight Form Factor: Packs immense gigging security and road-tested Italian design pedigree into an ultra-portable 2.2 kg frame.
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Technical Specifications
Amplifier Type Solid-State / Transistor Bass Amp Head
Output Power 300W RMS @ 4 Ohms / 150W RMS @ 8 Ohms (Note: Some manuals reference up to 180W @ 8 Ohms)
Preamp / Power Amp Solid-State Preamp / Class D Power Amp Modules
Analog EQ System Low (68Hz; ±16dB), Low Mid (360Hz; ±16dB), High Mid (800Hz; ±16dB), High (10kHz; ±16dB)
Filters & Shaping Variable Old School Filter, 3-Way Mode Switch, Front Mute Toggle Switch
Front Controls Gain, Low, Mid Low, Mid High, High, Old School, Line Out Level, Master Volume
Input Impedance Instrument Input: 1 M? (Max voltage 9 Vpp) / Return Loop: 22 k?
Input Connections 1 x 1/4′ TS Instrument Input, 1 x 1/4′ Footswitch Jack, Effects Loop Return
Output Connections Balanced XLR Line Out, Unbalanced Effects Send, Tuner Out, Speakon/Jack Combo Speaker Out
Rear Controls & Panel Pre/Post EQ Line Out Switch, Ground Lift Switch
Cooling Active temperature-controlled internal cooling fan
Dimensions (W x D x H) 27.6 cm x 25.5 cm x 8.3 cm / 10.87′ x 10.04′ x 3.27′
Net Weight 2.2 kg / 4.85 lbs