KSD C55 Reference – 2.5-Way Coaxial Main Monitor (White) PAIR

OVERVIEW

The C55 Reference by KSdigital in White finish features a dedicated 5.5″ coaxial driver and a dedicated 5.5″ woofer, which delivers exceptional sound performance. With maximum neutrality and minimal distortion, every sound and every impulse is reproduced precisely and musically. The featured drivers are custom-made to KSD spec and proprietary to KSD. The coaxial design allows the greatest freedom in listening distance and placement (vertical and horizontal placement possible), as the C55 Reference radiates as a real point source and thus works perfectly from near-field to longer listening distances. Six parametric user EQs in the FIRTEC processor allow perfect adaptation to the listening room and distance.

Thanks to phase-linear dispersion, using FIRTEC filters and a coaxial design, the KSD C55 Reference is extremely lively and impulse-true with an accurate representation of panorama width and stage depth. Two bass drivers double the cone surface area and, with their two powerful drives, ensure a clean, “boom-free” bass reproduction. The C55 Reference is therefore an ideal monitoring tool for music production, from tracking and mixing to mastering.

And of course, it’s also particularly nice to simply enjoy music with the C55 Reference.

In short:

• For vertical and horizontal use
• Point source works for all distances
• Extremely compact size with full bandwidth from 35Hz upwards

KEY HIGHLIGHTS

True Point-Source Coaxial Design

The 5.5″ coaxial driver ensures phase coherence and unified radiation from a single acoustic centre. The result is precise imaging, accurate panorama width, and realistic stage depth at any listening distance.

FIRTEC™ DSP with Phase-Linear Performance

FPGA-based FIRTEC™ processing delivers phase-linear crossover behaviour, ultra-accurate impulse response, and powerful room adaptation via six user-adjustable parametric EQs.

Compact Yet Full-Range Authority

Despite its compact footprint, dual 5.5″ drivers provide extended low-frequency response down to 35 Hz. The doubled cone surface area ensures clean, tight, and “boom-free” bass reproduction.

Flexible Placement – Vertical or Horizontal

Thanks to its coaxial dispersion characteristics, the C55 Reference performs consistently whether placed vertically or horizontally, making it ideal for diverse studio environments.

Built for Professional Production

From detailed tracking sessions to critical mixing and mastering decisions, the C55 Reference delivers maximum neutrality and minimal distortion for confident decision-making.

FEATURES

• True point-source coaxial architecture for precise imaging and phase coherence
• 2.5-way design with dedicated bass driver for enhanced low-frequency control and clarity
• FIRTEC™ DSP processing for phase-linear crossover performance
• Six user-adjustable parametric EQs for precise room and distance optimisation
• High & low shelving filters for quick tonal shaping
• Built-in limiter protection for reliable operation at high levels
• Delay and gain controls for system integration and alignment
• Vertical or horizontal placement flexibility without compromising imaging
• Designed for nearfield to midfield listening distances
• Low-distortion, highly neutral voicing for confident mixing and mastering decisions
• Premium White finish suitable for high-end studio environments
• Wall/ceiling mounting compatibility for flexible installation options

TECHNICAL SPECS

Type: 2.5-Way Coaxial Main Monitor (Pair)

High-Frequency Driver: 1″ Neodymium Tweeter (Silk Dome)

Mid/Coaxial Driver: Custom 5.5″ Coaxial Chassis (Fibreglass Cone)

Low-Frequency Driver: Custom 5.5″ Bass Chassis (Fibreglass Cone)

Signal Processing: DSP with FIRTEC™ (Patent: 19823110)

Processing Platform: FPGA-Based, 24-bit ADC/DAC

Crossover: FIR-Xover

User Controls:

• 6 Parametric EQs
• High & Low Shelving
• Delay
• Gain

Limiter: Integrated

System Power: 350 W

Maximum SPL: >108 dB Peak (pair)

Frequency Response: 35 Hz – 22 kHz

Dimensions:

• Height — 400 mm
• Width — 200 mm
• Depth — 240 mm

Weight: 12.2 kg (each monitor)

Colour/Finish: White

Mounting: Compatible with K&M 24471 wall/ceiling bracket