WorxAudio I/O-4 Indoor-Outdoor Speaker System

The WorxAudio® I/O-4 is a small-format, high-performance sound-reinforcement system designed for indoor and outdoor applications where music and speech reinforcement are specified. Its small size and unique appearance make it deal for restaurants, retail environments, bars, hotels, and other applications where high-quality music systems are specified. A standard mounting bracket provides flexible aiming and easy installation.

The versatile I/O-4 utilizes a dual-element array of high-output, 4-inch (101.6 mm) woofers. Its horn-loaded high-frequency waveguide is positioned between the two elements to ensure coherent and balanced high-frequency response. Polar lobing is controlled by this geometry and produces a properly aimed response at the crossover frequency.

Compact, Versatile Loudspeaker that Delivers Indoors or Outdoors

The loudspeaker can be easily configured for a standard low-impedance direct input and features a standard multitap input transformer that is switchable between 5, 12, 15, and 50 watts of input power.

Key features:

  • Compact profile
  • High sensitivity
  • Indoor/outdoor weather resistant
  • Two-element low-frequency array
  • Multitap matching transformer standard
  • Neodymium-based high-frequency driver


Technical Specifications

System Performance

Frequency Response (-3 dB) * 80 Hz – 18 kHz
Frequency Range (-10 dB) 75 Hz – 19 kHz
Nominal directivity (-6 dB) Horizontal: 75 Degrees
Nominal directivity (-6 dB) Vertical: 50 Degrees
Maximum Continuous SPL (passive, @ 1 meter) 105 dB
Power Handling (RMS)** Noise 50W
Maximum 100W
Pressure Sensitivity 2.83V 87 dB (1W, 1M)


Components LF: 4” (101.6 mm) x 2
HF: 1” Exit (25.4 mm) x 1
Diaphragm Titanium
Nominal Impedance 8Ω (switchable)


Enclosure Injection-molded, high-impact polycarbonate
Finish Color Black or White
Grille Powder-coated steel mesh
Connectors Push terminal
Transformer Isolate 5W, 12W, 25W, 50W / 100V
Dimensions 11.9” (303 mm) x 6.2” (157 mm) x 10.5” (267 mm)
Net Weight 11 lbs (5 kg)
Shipping Weight (2 per carton) 24.6 lbs. (11.2 kg)
Product Versions Ai
Supports Universal supports


* Frequency response and range measured on-axis with anechoic environment.
** Power handling tested using pink noise filtered to meet IEC 268-5, 6 dB crest factor, 100 hours, with recommended EQ.