ESX QXE6D2

The ESX QUANTUM QXE6D2 impresses with its powerful bass response and robust construction, despite its compact dimensions. The high-quality die-cast aluminum basket, the powerful dual-magnet system with a total of 80 oz., and the double-stitched surround ensure high stability and durability.

The generously sized 50-mm dual voice coil, with a winding height of 30 mm, enables an RMS power handling capacity of 250 watts. A vented pole piece bore and additional cooling via the T-plate aid in heat dissipation during high-load operation.

Thanks to its two 2-ohm voice coils, the subwoofer can be flexibly configured for a total impedance of either 1 ohm or 4 ohms. The hand-formed paper cone and the long cone excursion enable powerful bass reproduction even in tight spaces.

Technical Specifications

• Manufacturer: ESX

• Series: QUANTUM QXE

• Model: QXE6D2

• Speaker Type: Compact Subwoofer

• Nominal diameter: 16.5 cm (6.5 inches)

• RMS Power Handling: 250 watts

• Maximum power handling: 500 watts

• Impedance: 2 + 2 ohms (dual voice coil)

• Total impedance in a parallel circuit: 1 ohm

• Total impedance in series connection: 4 ohms

• Voice coil diameter: 50 mm (2 inches)

• Voice coil winding height: 30 mm

• Voice coil former: Aluminum

• Magnetic Drive: Dual Magnet

• Magnet weight: 80 oz. (approx. 2.27 kg)

• Magnet dimensions: Ø 134 × 40 mm

• Diaphragm material: Handmade paper

• Bead: Foam bead, double-stitched

• Centering spider: Double Nomex centering spider

• Dust-proof cap: Injection-molded polypropylene (PP)

• Speaker basket: Die-cast aluminum

• Cooling: Ventilated pole core bore and T-plate

• Linear diaphragm stroke: ±10 mm (according to the ESX data sheet)

• Maximum mechanical diaphragm stroke: ±15 mm (according to the ESX data sheet)

• Outer diameter: 179 mm

• Installation opening: 150 mm

• Installation depth: 117 mm
  
  

Thiele-Small parameters (TSP)

• Resonance frequency (Fs): 50.4 Hz

• Mechanical Quality (Qms): 5.21

• Electrical quality (Qes): 0.47

• Total Quality (Qts): 0.43

• Equivalent volume (Vas): 3.2 liters

• Moving mass (Mms): 91.5 g

• Effective membrane area (Sd): 120 cm²

• DC resistance (Re): 2 × 1.9 ohms

• Voice coil inductance (Le): 1.93 mH

• Force factor (BL): 15.3 N/A

• Sensitivity (SPL): 81.3 dB (1 W/1 m)

• Maximum sound pressure level inside the vehicle, according to the data sheet: 135 dB
  
  

Manufacturer's Case Recommendation

• Enclosure type: Bass reflex

• Net tank volume: 12 liters

• Bass reflex port diameter: 66 mm

• Bass reflex port cross-sectional area: 34 cm²

• Bass reflex tube length: 41 cm

• Tuning frequency (Fb): 48 Hz

• Lower cutoff frequency at −3 dB (F3): 40 Hz