IsoWave D4


  • 4 X 15″ (380 mm) Low Frequency Driver
  • 12” (300 mm) Mid Frequency Driver
  • 1.75” (44 mm) (380 mm) High Frequency Driver
  • Coherent wavefront
  • Point source reproduction
  • Coaxial design with waveguide loading
  • Large 90° X 60° MDF horn
  • High dynamic SPL
  • Low harmonic distortion
  • Enhanced sonic accuracy
  • Smooth and extended frequency response


The IsoWave D4 3-Way Speaker System design emphasizes on consistency and linearity of on and off axis frequency response providing more spatially consistent sound compared to designs utilizing offset drivers. The enhanced sonic accuracy of IsoWave Speaker System is primarily possible due to the carefully integrated coaxial solution.

The Mid-High section of IsoWave D4 incorporates a 12″ extremely low distortion Low-Mid driver in conjunction with a coaxially mounted 1.75″ voice coil high frequency compression driver. The High frequency driver is loaded with a 90° horizontal X 60° vertical waveguide. This sophisticated waveguide also loads the 12″ low frequency driver. Together the system forms a high sensitivity, high SPL motor system with exceptional linearity and directivity control.

The system is further loaded with a 90° horizontal X 60° vertical large horn made of MDF enhancing propagation control down to 250 Hz . The horn can be vertically tilted by from  0° to 22.5° in increments of 2.5° to accurately achieve desired vertical coverage.

The low frequency section is powered with four 15″ long throw weather resistant Low frequency drivers. The Low frequency enclosure is optimally coupled to the Mid-High section to reproduce lobe free wavefront. The resultant frequency response is uniform and easy to equalize when required. DSP settings are provided for optimum performance when using either a Bi-amp or tri-amp configuration.

Frequency Response45Hz to 20kHz
Power RatingLF: 2000W AES, 8000W peak;

MF: 500W AES, 2000W peak;

HF: 80W AES, 450W peak

SensitivityLF: 104dB @ 1W/1m;

MF: 105.5dB @ 1W/1m;

HF: 113dB @ 1W/ 1m

Maximum SPLLF: 137dB continuous, 143dB peak @ 1m;

MF: 132.5dB continuous, 138.5dB peak @ 1m;

HF: 132dB continuous, 138dB peak @ 1m

Nominal ImpedanceLF: 4Ω; MF: 8Ω; HF: 16Ω
Recommended Amplifier800W to 1300W @ 4Ω X 2 Ch.
Low Frequency Driver4 X 15″ (380 mm) weather resistant long excursion woofer
Mid Frequency Driver12” (300 mm) Low-Mid driver with coaxial entry
High Frequency Driver1.75” (44 mm) voice coil compression driver mounted coaxially
Crossover250Hz Active, 1.2kHz Active or Passive
FinishBlack impact resistant structured coating
ConnectorPush type binding post, cable upto 4 mm diameter
Enclosure18 mm MDF direct radiator vented enclosure
Dimensions (H X W X D)1789 mm X 1235 mm X 670 mm (70.4” X 48.6” X 26.4”)
Net Weight145 kg (320 lb)
Packed Weight156 kg (344 lb)
SKU: 4