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Quantum Signature

High-end floorstanding speaker as 3-way bass reflex system

  • The ultimate Quantum flagship: Six 3-way precision acoustic transducers, absolute high-tech materials and decades of experience
  • 30 mm fmax Signature special tweeter with a particularly lightweight membrane made of semi-crystalline polymer (PTFE) for maximum efficiency
  • Two Klippel-optimized 170 mm "Controlled Flexing Cone" woofers with ceramic-aluminium cone sandwich membrane for outstanding three-dimensionality
  • Three 200 mm ceramic-aluminium cone subwoofers for an incomparably precise, dynamic and detailed bass foundation
  • Extremely sturdy MDF enclosure, rounded at the sides and weighing in at 73 kg, with low-resonance baffle and double-walled side profile structure

High-end floorstanding speaker as 3-way bass reflex system

The Quantum Signature is impressive at first sight due to its sheer size. The speaker accommodates a total of six high-tech individual chassis in a high gloss MDF cabinet, which weighs in at 73 kg. The overall appearance of this exceptional transducer is predominantly shaped by three sumptuous 200 mm woofer chassis. The two 170 mm midrange drivers offer ideal properties in the critical vocal range. The new dome tweeter in the Signature speaker is positioned centrally in a D´Appolito configuration.

Test reviews

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Ceramic meets aluminium

Three high-strength ceramic-aluminium membranes with an inverse dust cap produce bloodcurdling bass of the highest quality.

Top-class connector panel

The large bi-wiring terminal with solid screw terminals and high-quality cable bridges also provides scope for larger gauge cables.

High Resolution

The particularly lightweight fabric tweeter membrane guarantees maximum efficiency and, at the same time, outstanding harmony with the mid-tone range.

Technical specifications

  • 3 way bass reflex, triple bass
  • 3 x 6.5“ woofer
  • 2 x 6.5“ midrange
  • 30 mm tweeter
Power Handling (RMS/Max.)
  • 400 / 700 watts
Sensitivity (2.8V/1m)
  • 94 dB
  • 4 – 8 Ohms
Frequency Response
  • 16 – 75000 Hz
Crossover Frequencies
  • 200 Hz / 2900 Hz
Recommended Amplifier Output
  • > 35 Watts
Dimensions (WxHxD)
  • 313 x 1410 x 465 mm
  • 73 kg


Highly modern design with silk matt lacquer and aluminium applications
  • Floorstanding speaker
Woofer / midrange
  • Well-ventilated die-cast basket to prevent turbulence and compression effects
  • Sophisticated voice coil ventilation for a particularly high degree of resilience
  • High cone rigidity ensured by inverse ceramic/aluminium dust caps for the woofer and midrange
  • Distortion-optimised magnet system with double induction rings and stray field optimisation
  • „Controlled Flexing Cone“: Cone geometry for controlled dispersion of bending waves in the midrange, and with it the capability to reproduce a greater bandwidth
  • Kapton voice coil to minimise eddy current loss, thereby ensuring minimal distortion of the midrange
  • Detachable cloth grille with optimized acoustic transmissivity and hidden magnetic fixing
  • Height-adjustable metal spikes included
  • Klippel® optimised construction
  • High-quality interior cabling by Oehlbach®
  • f-max Signature tweeter dome with a particularly wide surround for optimized dispersion characteristics at frequencies above 20kHz
  • Solid aluminium flange with optimized acoustic transmission
  • Particularly lightweight cone construction consisting of semicrystalline polymer (PTFE) for maximum efficiency
  • Copper cap-optimised drive system for minimum distortion
  • Generous ventilation of the magnet system with low natural resonance
  • Built to 24dB LKR topology standards with transformer core coils and audiophile polypropylene capacitors
  • XO on 2 separate circuit boards in order to optimize the speakers when they are used in bi-wiring mode
  • XO mechanically insulated from the cabinet
  • Gold-plated and acrylic-encased speaker connectors
  • Big bi-wiring connecting terminal with solid screw connectors and

    high-quality cable bridge
  • Airflex ports with extremely wide openings for optimized bass connection
  • Extensive bracing to support the chassis unit
  • Double-sectioned side reinforcements with varying material thickness to reduce vibration in the cabinet
  • Low resonant, stable MDF cabinet
  • Solid and substantially braced MDF cabinet with rounded side panels and decorative high-gloss front
Cabinet surface
  • Piano White
  • Piano Black