Overview
The KFLEXKFONIKGK/GV series is a versatile family of floorstanding, modular, ultralowprofile speakers designed for professional installations and highend residential environments. Engineered by the Germanbased audio specialist KFONIK, the GK (GeneralPurpose) and GV (VariableHeight) models combine a sleek aesthetic with powerful acoustic performance, making them suitable for conference rooms, hotels, museums, retail spaces, and modern office lobbies.
Both GK and GV share a common driver architecture a 6.5in (165mm) lowfrequency cone, a 1in (25mm) dome tweeter, and an optional midrange waveguide wrapped in a compact aluminiumalloy frame. What sets the GV apart is its modular heightadjust system that allows the cabinet to be extended in 30mm increments without compromising acoustic continuity.
GK (left) and GV (right) in a typical installation
Key Features
- Ultralow profile: Height ranges from 70mm (GK) to 130mm (GV with one extension), allowing placement close to the ceiling or under desks.
- Modular design: GV units can be stacked in multiples of 30mm, giving designers freedom to adapt to varying room dimensions.
- Highefficiency drivers: 105dB SPL at 2.83V (1W) with 90% bass response down to 45Hz.
- Wide dispersion: 120 horizontal and 80 vertical coverage ensures even sound field across large zones.
- Passive radiators: Integrated tuned passive radiator improves lowfrequency extension without needing a subwoofer.
- Advanced crossover: 2ndorder Butterworth design with minimal phase distortion; optional DSP module for room correction.
- Robust construction: CNCmachined aluminium chassis, hightemperature resistant polymer grilles, and sealed internal cavity for longevity.
- Secure mounting system: Proprietary KFLEX brackets enable quick, toolless installation on ceilings, walls, or suspended grids.
- Ecofriendly: RoHScompliant components and recyclable aluminium housing.
Because the GK/GV series uses a passive radiator instead of a traditional bass reflex port, it eliminates port noise (chuffing) while maintaining tight, controlled bass a major advantage in acoustically sensitive environments.
Technical Specifications
| Parameter | GK (Standard) | GV (Base) | GV (Extended) |
|---|---|---|---|
| Overall Dimensions (WHD) | 165mm70mm60mm | 165mm90mm60mm | 165mm130mm60mm |
| Weight | 1.2kg | 1.3kg | 1.5kg |
| Impedance | 8 (single), 4 (parallel) | 8 | 8 |
| Power Handling (RMS) | 30W | 35W | 35W |
| Sensitivity | 105dB (1W/1m) | 106dB | 106dB |
| Frequency Range | 45Hz20kHz | 40Hz20kHz | 40Hz20kHz |
| Dispersion (HV) | 12080 | 12080 | 12080 |
| Crossover Frequency | 2.5kHz (2way) | 2.5kHz (2way) | 2.5kHz (2way) |
| Connector | 3pin speakON (2/4) | 3pin speakON | 3pin speakON |
| Operating Temperature | 20Cto+45C | 20Cto+45C | 20Cto+45C |
| Compliance | CE, FCC, RoHS | CE, FCC, RoHS | CE, FCC, RoHS |
Typical Applications
Corporate & Conference Environments
The low profile of the GK series makes it perfect for mounting just above a suspended acoustic tile ceiling. Its wide dispersion eliminates dead zones, providing even speech intelligibility throughout large boardrooms.
Hospitality & Lobbies
GVs adjustable height allows designers to blend the speaker into decorative cornices or behind artwork without protruding. The sleek aluminium finish matches modern interior palettes.
Museums & Galleries
Because the drivers are sealed and free from vent noise, the speakers can be placed close to sensitive display cases where lowfrequency distortion would be problematic.
Retail & Ambient Music
Both models deliver a pleasant fullrange sound that can be zoned across aisles. The modular nature of GV lets installers create a stepped acoustic gradient that matches the retail layout.
Educational Facilities
Durable brackets and the ability to mount on a variety of surfaces (suspended ceilings, exposed beams, or wall panels) make the GK/GV range a costeffective solution for lecture halls.
Installation Guidelines
While the KFLEX mounting system is designed for simplicity, proper planning ensures optimal performance.
- Plan speaker spacing: For uniform coverage, maintain a distance of 1.2room height between adjacent units.
- Determine mounting surface: Verify that the ceiling or wall can support the combined weight of the speaker plus brackets (max 2kg per mounting point).
- Use the supplied brackets: The brackets feature predrilled holes for standard M6 screws and include a springloaded clamp for quick repositioning.
- Route cabling: Prefer speakON connectors with 2wire (positive/negative) termination. Keep cable runs under 30m to avoid excessive loss.
- Calibrate with DSP: If a DSP module is used, run an autoEQ sweep after installation to correct room modes.
- Secure extensions (GV only): Align the locking pins and tighten the setscrew on each joint. The design prevents accidental detachment.
Maintenance & Troubleshooting
Regular maintenance extends the life of GK/GV speakers and preserves audio quality.
Cleaning
- Wipe the grille with a soft, dry microfiber cloth.
- For stubborn dust, use a slightly damp cloth with mild soap; avoid excess moisture.
Inspection
- Check mounting brackets every 6months for looseness.
- Inspect the speakON connector for corrosion; clean with contact cleaner if needed.
Troubleshooting Checklist
- No sound verify power, speaker polarity, and that the speakON is fully seated.
- Distorted bass ensure the passive radiator is free to move; check that the enclosure is sealed.
- Uneven coverage remeasure speaker spacing and consider adding acoustic treatment.
