Quantum SUB 731 A

Quantum 731 A


Active subwoofer, bass reflex, downfire

The Quantum 731A is the perfect low-bass counterpart to the Quantum 750 series. Besides the extremely low-resonance 45 mm case front on a corpus with multiple stiffening, it offers a clear and modern language of shape that is available in perfect high-gloss or silk-matt varnish finishes. The latest-generation computer-optimised long-throw subwoofer chassis delivers uncompromisingly clean and dynamic basses.

The Quantum 731A is available in a black, white or black-mocha finish. A long-throw subwoofer chassis with a diameter of 300 mm and hardened paper cone, high-strength die-cast basket and ventilated high-performance voice coil is responsible for ideal bass precision. The high-gloss base plate maintains a defined distance to the chassis for optimum level efficiency, the high-performance power amplifier guarantees highest level reserves.

bass reflex, ‘Down-fire’ construction
300 mm Woofer
Output power (RMS / Max.)
180 / 360 watts
Frequency Response
18 – 200Hz
Crossover Frequencies
40-180 Hz adjustable
switchable 0°/180°
Dimensions (WxHxD)
340 x 568 x 475 mm
26.1 kg
Cabinet surface
Piano Black/Black satin
Piano Black/Mocca veneer
Piano White/White satin