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Martin Audio Blackline H3+ Zoom

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Martin Audio Blackline H3+

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Three-way bi-amp trapezoid Hybrid® fully horn loaded

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Martin Audio

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Product Description


Martin Audio Blackline H3+

The Blackline H3+ is a very high performance, all-horn, three-way system in a single, wide-bandwidth package. New drivers have been developed for improved performance in all bands. The Hybrid® low frequency section comprises a horn-loaded 15” (380mm)/4” (100mm) voice coil driver that is reflex loaded to extend the LF output to below the natural cut-off point of the horn. The new LF driver features a water resistant cone and triple roll surround for increased excursion.

The mid-horn of the H3+ has a unique ‘phase-ball’ loading device which maintains the constant directivity characteristics of the horn at the upper end of its range. It is driven by a new 10” (250mm) midrange driver with an aluminium demodulating ring for improved high-mid clarity and reduced distortion when driven hard. The 70° x 40° HF section of the H3+ features a neodymium 1” (25mm) exit compression driver with a Kapton diaphragm for high sensitivity and extended HF performance. The internal mid/high passive crossover allows this three-way system to be driven in a bi-amp configuration.

A Martin Audio M3+ or DX1.5 Electronic Controller is available to provide H3+ crossover and limiter facilities.


  • All-horn three-way system
  • ‘Phase-ball’ loaded mid-driver
  • Hybrid® LF section
  • Fitted with handles and castors
  • Five year limited warranty 


Larger club performance
Large scale installs

Additional Information

Additional Information

Manufacturer Martin Audio

TYPE Three-way bi-amp trapezoid Hybrid® fully horn loaded


DRIVERS 15” (380mm)/4” (100mm) coil bass driver
10” (250mm)/2.5” (63.5mm) coil mid driver
1” (25mm) exit HF compression driver

RATED POWER (2) LF: 750W AES, 3000W peakMF + HF: 300W AES, 1200W peak

MF + HF: MA2.0

SENSITIVITY (6) LF: 104dB, MF + HF: 104dB

MAXIMUM SPL (9) 133dB continuous, 139dB peak

NOMINAL IMPEDANCE LF: 8 ohms, MF + HF: 8 ohms

DISPERSION (-6dB) 70˚ horizontal, 40˚ vertical

CROSSOVER 200Hz active, 2kHz passive

ENCLOSURE 250 litre, multi-laminate birch ply

FINISH Textured black paint

PROTECTIVE GRILLE Black perforated steel

CONNECTORS 2 x Neutrik NL4

PIN CONNECTIONS LF+,- : 1+,1-, (MF + HF) +,- : 2+,2-

FITTINGS 12 x M10 inserts
4 x 4” (100mm) castors, 4 x pocket handles

DIMENSIONS (inc wheels) (W) 560mm x (H) 1066mm x (D) 780mm (911mm)
(W) 22ins x (H) 42ins x (D) 30.7ins (35.9ins)

WEIGHT 77.5kg (170.5lbs)


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