Markbass CMD 151P Jeff Berlin 1x15 Bass Combo

Pure Bass Tone Without Compromise: Markbass CMD 151P Jeff Berlin Signature Bass Combo

Designed in strict collaboration with legendary bass virtuoso Jeff Berlin, the Markbass CMD 151P Jeff Berlin Signature combo is a masterclass in pure, unadulterated bass tone. For decades, Jeff Berlin has advocated for a bass amp that accurately reflects the natural acoustic character of the instrument without artificial coloration. To achieve this, the CMD 151P drops the traditional high-frequency tweeter entirely, relying instead on a premium 15-inch custom speaker. Delivering an earth-shattering 300 watts of standalone power (upgradable to a massive 500 watts) while maintaining a highly portable frame, this signature Italian-built combo is the ultimate choice for bassists who prize rich low-end bloom, throatier mid-range authority, and natural top-end clarity.

The Tweeterless Philosophy: Why No Tweeter?

The defining design characteristic of the CMD 151P Jeff Berlin model is the complete absence of a tweeter or high-frequency driver. According to Jeff Berlin's strict tonal philosophy, tweeters add an unneeded, harsh, and artificial "clack" to bass strings that compromises the organic warmth of the wood. By letting a specialized 15-inch BVC (Bass Voice Coil) woofer handle the entire frequency response from 40 Hz up to 5 kHz, the combo produces a smooth, seamless high-end rolloff. This configuration ensures that your fingers, pickups, and wood choice dictate the articulation, resulting in a fat, round, and highly musical old-school character that sits perfectly in any mix.

Authoritative 15-Inch Air Movement with Modern Definition

While many old-school 15-inch cabinets suffer from a sluggish, muddy transient response, Markbass utilizes a custom-engineered 15-inch speaker that defies tradition. Built with custom magnet structures, this speaker delivers the deep, pillowy low-end cushion expected from a 15-inch driver, alongside an incredibly fast transient attack and pristine mid-range definition. Complex chordal work, fast jazz runs, and heavy fingerstyle grooves cut through dense multi-instrument arrangements with pristine clarity and absolute authority.

Iconic Markbass Tone-Shaping Filters

The onboard preamp head features an incredibly precise 4-band active equalizer (Low, Mid-Low, Mid-High, High) capable of up to 16 dB of boost or cut per band. To complement standard equalization, the control panel integrates Markbass’s world-renowned, signature analog tone-shaping 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 recreate the warm, organic, dark character of old-school passive cabinets—the perfect preset for classic Motown, soul, and traditional 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, scooped profile perfect for modern, snappy slap-and-pop techniques.

Massive, Scalable Rig Power

Driven by a high-efficiency solid-state preamp and a proprietary power module, the CMD 151P Jeff Berlin pumps out a focused, highly articulate 300 watts RMS entirely on its own into its internal 8-Ohm load. This provides ample headroom and volume for club dates, theater pits, and tracking sessions. When you need to scale up to command major festival stages or high-volume rock environments, simply connect an external 8-Ohm extension cabinet (such as the matching New York 151). This drops the system impedance to 4 Ohms, instantly unleashing the full 500-watt fury of the internal power plant.

Key Features at a Glance

Designed with Jeff Berlin: Engineered around the strict tonal parameters and philosophy of one of the world's premier bass virtuosos.
Tweeterless 1-Way Design: Eliminates artificial high-frequency harshness for a naturally warm, smooth, and highly musical tone.
15" Custom Markbass Woofer: Delivers deep, rich air movement with exceptional mid-range clarity and lightning-fast transient response.
Signature VLE and VPF Filters: Offers instant access to retro, vintage warmth or modern, contoured slap profiles.
Scalable Output Power: Operates at a solid 300W standalone, ramping up to a full 500W RMS when paired with an external 8-Ohm 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 CMD 151P Jeff Berlin excels in musical genres where instrumental nuance, natural dynamics, and tonal clarity are paramount, making it an exceptional asset for jazz, fusion, progressive rock, funk, and blues bassists. Its uncolored, linear frequency response makes it a stunning match for high-end active 5- or 6-string electrics, passive vintage instruments, and acoustic upright contrabasses. Use it as a highly portable, grab-and-go standalone unit for rehearsals and club sets, or pair it with an external 15-inch extension cabinet to build an unstoppable, full-range dream stack that commands the entire room.

Technical Specifications

Output Power: 500W RMS @ 4 Ohms / 300W RMS @ 8 Ohms
Speaker Configuration: 1 x 15" Custom Markbass Woofer
Tweeter Type: None
Speaker Power Handling: 400W RMS (AES Standard)
Frequency Response: 40 Hz to 5 kHz
Sensitivity: 100 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, Balanced XLR 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): 46.5 cm x 55 cm x 48 cm (18.31" x 21.65" x 18.9")
Weight: 17.6 kg (38.80 lbs)