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New PreSonus WorxAudio I/O-4 Indoor/Outdoor 100v Passive Speaker System (Pair) Black

Original price $499.95
Current price $399.95

The I/O-4 Speaker System from PreSonus is a small format high performance sound reinforcement system, comprised of two speakers. The I/O-4 is designed for high quality foreground and background music applications for both indoor or outdoor applications. The I/O-4 utilizes a two element array of high output 4" woofers. The horn loaded high frequency wave guide is positioned between the two element arrays for coherent and balanced high frequency response. Polar lobing is controlled by this geometry and produces an aimed response at the crossover frequency. The system features a standard multi-tap transformer input that is switchable from a maximum of 50W of input power. The I/O-4 is equipped with a standard mounting bracket designed for flexible aiming and easy installation. The I/O-4 is ideal for use in restaurants, retail environments, bars, hotels, and more.


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.