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Dayton Audio

Dayton Audio - 4" Coaxial Driver - CX120-8

Dayton Audio - 4" Coaxial Driver - CX120-8

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Description

With a natural sounding 3/4" soft dome tweeter concentrically mounted in a long throw poly cone 4" woofer Dayton Audio's CX120-8 will produce extremely smooth response on and off-axis while avoiding the phase and lobing issues associated with standard 2-way designs. This driver is perfect for compact designs, portable speakers, or even custom car audio systems.

The Dayton Audio CX120-8 is a full-range coaxial loudspeaker providing high-quality sound in a very compact format featuring a 4" curved linear poly cone woofer mated with a 3/4" silk dome tweeter. The poly cone woofer provides a good balance between stiffness, low mass, and damping making for a very natural sounding driver with a smooth frequency response. The silk dome tweeter provides detailed and clear high frequencies with minimal distortion. In addition, the optimised tweeter placement and flaring reduce the phase issues with the woofer that is commonplace with even the BIG brand coaxes. Designed for use as a full-range in a small bookshelf speaker, an extended range (i.e. midrange/tweeter) driver in a 3-way system, or even car audio systems.

4" Woofer:

  • 1" voice coil wound on an aluminium former for high power handling
  • Curved linear shaped poly cone provides a good balance between stiffness, low mass and damping making for a natural sounding driver with a smooth frequency response
  • Optimised rubber surround for reduced break up in the midrange band
  • Attractive rigid open cast frame cast frame to minimise reflections, resonances and improve air flow
  • High energy ceramic magnet for greater cone control and improved efficiency

3/4" Tweeter:

  • Silk dome provides detail and clarity of high frequencies
  • Coaxially mounted to pole piece of woofer cone
  • Optimised placement and trimmed flaring to reduce phase issue interaction with woofer
  • Strong neodymium magnet
  • Trimmed flared throat to minimise phase issues causing suck-out with woofer
  • High pass filter required (not included)

Features

  • Full-range with accurate bass and extended high frequency response
  • Coaxial mounted 3/4" silk dome tweeter
  • Open cast frame for improved air flow and minimal power compression
  • 4" curvilinear poly cone woofer with rubber half roll surround

Specifications

General

Driver type Coaxial
Nominal size 4"
Nominal impedance 8Ω
Series Coaxial
Power handling (RMS) 40 W
Power handling (program) 80 W
Sensitivity 88.5 dB
Frequency range 90 – 20,000 Hz
Suggested alignment Ported

Thiele/Small parameters

Resonant frequency (Fs) 87.5 Hz
DC resistance (Re) 6.22 Ω
Voice coil inductance (Le) 0.63 mH
Mechanical Q (Qms) 2.89
Electrical Q (Qes) 0.57
Total Q (Qts) 0.48
Equivalent volume (Vas) 3 L
Compliance (Cms) 0.765 mm/N
Moving mass (Mms) 4.82 g
Mechanical resistance (Rms) 0.9169 kg/s
Force factor (Bl) 5.08 T·m
Effective piston area (Sd) 52.51 cm²
Linear excursion (Xmax, one-way) 3 mm
Displacement volume (Vd) 15.75 cm³
Efficiency bandwidth product (EBP) 153.5

Motor

Voice coil wire CCA

Mounting

Overall diameter 120 mm
Cutout diameter 109.6 mm
Mounting depth 59 mm
Mounting holes 4
Voice coil diameter 25.4 mm
Weight 0.8845 kg

Materials

Cone Polypropylene
Surround Rubber
Voice coil former Aluminium
Basket Cast Aluminium
Magnet Ferrite
  • Xmax is quoted one-way (peak), not peak-to-peak.
  • Sensitivity measured at 2.83V/1m.

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