Quantum 675

Floor-standing loudspeaker, 2.5-way bass reflex with double bass

The Quantum 675 is the smaller of two floor-standing loudspeakers in the Quantum 670 series, a further development of Magnat´s Quantum 650 series, which was highly praised in many test reviews. The elegantly rounded MDF case with its elaborate struts and varnished 25 mm acoustic baffle constitute the strong foundation for high-strength aluminium-ceramic cones and the lightweight dome made of synthetic silk with redesigned horn flare.

The Quantum 675 is available with a black and mocha-coloured corpus, the baffle on both versions possesses a black piano-lacquer finish. One bass and one bass/mid-range loudspeaker with a diameter of 170 mm in conjunction with Magnat´s proven ceramic-aluminium sandwich cone in streamlined baskets made from carbon-fibre-reinforced ABS are responsible for highly precise sound and harmonious transitions to the dynamic second-generation "HRH" silk dome.


Piano black


Test reports

  • AudioVideo Russia<br>09 / 2013

    AudioVideo Russia
    09 / 2013


30 mm tweeter

170 mm midrange

1 x 170 mm woofer


Klippel®-optimised overall design


Airflex ports with extremely large opening areas to guarantee best-possible bass coupling

Baffle in a high-quality varnished finish

Sturdy MDF case with rounded sides and low-resonance 25 mm baffle

Solid base plate

Removable protective grille with optimised acoustic transmissivity

Metal spikes included


2,5 way, bass reflex


Second-generation harmonic radiation horn (HRH) tweeter with 30 mm fabric dome, special damping, ferrofluid cooling and wide surround

Woofer / midrange

FE-Dynamics bass/mid-range loudspeaker with ceramic-aluminium cones, 25 mm voice-coil unit and a flow-optimised basket made from carbon-fibre composite


High-quality internal wiring


Large bi-wiring terminal area with solid screw connections

2 ½ way bass reflex
30 mm tweeter
170 mm midrange
1 x 170 mm woofer
Power Handling (RMS / Max.)
180 / 300 Watts
Sensitivity (2.8V/1m)
92 dB
4 – 8 Ohms
Frequency Response
22 – 50000 Hz
Crossover Frequencies
250 Hz, 3100 Hz
Recommended Amplifier Output
> 30 Watts
Dimensions (WxHxD)
202 x 995 x 316 mm
17 kg
Cabinet surface
Piano black/ Ash decor black
Piano black/ Ash decor mocca