Markbass MB58R CMD 121 P 1x12 Bass Combo 300W

The Portability Champion: Markbass MB58R CMD 121 P Bass Combo

For decades, the 1x12" bass combo has been the ultimate sweet spot for urban musicians, session players, and weekend warriors who require a rig that is easy to transport but still packs a serious punch. However, traditional 12-inch combos can still feel heavy and awkward during late-night load-outs. The Markbass MB58R CMD 121 P completely rewrites the rules of bass amplification portability. By pairing a classic, warm-sounding 12-inch ceramic speaker with an eco-friendly, cutting-edge proprietary enclosure material, Markbass has created a full-sized professional combo that delivers an incredible power-to-weight ratio. Weighing an astonishingly light 14.3 kg (31.6 lbs), this Italian-built powerhouse lets you bring your signature tone anywhere without breaking your back.

The MB58R Material Revolution: Unmatched Portability

The defining innovation of the MB58R series is its focus on future-facing engineering and the environment. Instead of traditional, heavy plywood or MDF, the cabinet is constructed using a state-of-the-art, high-tech eco-friendly material. This advanced structural enclosure dramatically sheds dead weight while maintaining the structural rigidity and acoustic resonance required for a punchy, professional bass amp. Driven by a high-efficiency solid-state preamp and a proprietary power module, the MB58R CMD 121 P delivers a natural, open, and responsive sound stage that easily handles the punishing dynamics of live performances.

Classic Ceramic Warmth Meets Modern High-End Detail

While many ultra-lightweight setups utilize neodymium magnets, the "P" (Pulse) series is specifically engineered for bassists who love classic speaker response. The combo features a premium 12-inch Markbass Classic Ceramic speaker, celebrated for its unique acoustic footprint. It provides a fat, organic low-frequency bloom and a throaty, musical mid-range punch that sits perfectly in a live mix. To balance this rich low-end cushion, Markbass incorporates a newly designed custom piezo tweeter that extends high-frequency tracking up to 18 kHz, ensuring your percussive slap accents, pick attacks, and delicate string dynamics retain a crisp, glassy clarity.

Legendary Markbass Tone-Shaping Filters

To help you quickly adapt to unpredictable room acoustics, the front control panel features a highly accurate, musical 4-band active equalizer (Low, Mid-Low, Mid-High, High) capable of up to 16 dB of boost or cut. Alongside the standard EQ, the head integrates Markbass's world-renowned, signature analog tone filters:

VLE (Vintage Loudspeaker Emulator): A specialized low-pass filter that gradually rolls off high frequencies (ranging from 250 Hz to 20 kHz) to beautifully emulate the dark, round, organic character of old-school passive cabinets—the ultimate preset for classic Motown, soul, and blues.
VPF (Variable Preshape Filter): An advanced contour filter that cuts mid-range frequencies centered around 380 Hz while boosting low-end body and high-end sparkle, instantly creating a pristine, contoured profile perfect for modern, snappy slap-and-pop techniques.

The Scalable Rig: From Intimate Cafes to Full Stage Stacks

The modular output architecture makes the MB58R CMD 121 P an incredibly versatile workhorse. On its own, the internal 8-Ohm system delivers a solid, highly focused 150 watts of RMS power—ideal for intimate jazz sets, acoustic coffeehouse gigs, studio tracking, and theater orchestra pits. When you need to dominate a loud rock band or step onto a major festival stage, simply connect an external 8-Ohm extension cabinet (such as the MB58R 121 P or a matching cabinet from the PURE series). This drops the total system load to 4 Ohms, instantly unleashing the full 300-watt fury of the internal power plant and doubling your speaker surface area for a massive wall of sound.

Key Features at a Glance

Revolutionary Ultra-Light Cabinet: Eco-friendly structural materials reduce the total weight of a full-sized 12" combo to an unbelievable 14.3 kg.
12" Markbass Classic Ceramic Speaker: Delivers deep, organic, old-school low-end warmth with an authoritative mid-range punch.
New Custom Piezo Tweeter: Injects studio-grade high-frequency shimmer and crisp articulation to highlight your individual playing technique.
Signature VLE and VPF Filters: Offers instant access to retro, vintage warmth or modern, contoured slap-and-pop profiles.
Scalable Output Power: Operates at a solid 150W standalone, ramping up to a full 300W RMS when paired with an external extension cabinet.
Comprehensive Studio Connectivity: Onboard effects loop, tuner output, and a studio-grade balanced XLR line output with independent level control.

Common Uses and Stage Configurations

The Markbass MB58R CMD 121 P excels across a wide variety of musical genres, making it an exceptional asset for funk, pop, blues, rock, and jazz bassists. Its natural, clear frequency response makes it an excellent match for high-fidelity active 5-string electrics, passive vintage instruments, and acoustic upright contrabasses alike. Use it as a self-contained, grab-and-go unit for rehearsals, intimate club sets, and tracking sessions, or pair it with an external extension cabinet to build an unstoppable, lightweight dream stack that commands the entire room.

Technical Specifications

Output Power: 300W RMS @ 4 Ohms / 150W RMS @ 8 Ohms
Speaker Configuration: 1 x 12" Markbass Classic Ceramic Woofer
Tweeter Type: New Piezo Tweeter
Speaker Power Handling: 300W RMS (AES Standard)
Frequency Response: 40 Hz to 18 kHz
Crossover Frequency: 3.5 kHz
Sensitivity: 99 dB SPL
Controls: Gain, 4-Band EQ, VLE Filter, VPF Filter, Master Volume, Line Out Level Control
EQ Centers: Low (40 Hz), Mid-Low (360 Hz), Mid-High (800 Hz), High (10 kHz) at ±16 dB
Inputs: 1/4" Instrument Input, 1/4" Effect Return
Outputs: Balanced XLR Line Out (with Pre/Post EQ and Ground Lift switches), 1/4" Tuner Out, 1/4" Effect Send, speakON Combo External Speaker Output
Cabinet Porting: Rear Bass Reflex Ported
Dimensions (W x H x D): 45 cm x 57.6 cm x 47.1 cm (17.72" x 22.68" x 18.64")
Weight: 14.3 kg (31.6 lbs)