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Optimal Audio Cuboid 15

Two-way, full range, passive, 15" loudspeaker
$945.00 / EA
Only 2 left
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Cuboid 15 is a full range, two-way, passive, 15” loudspeaker designed to perform. For any applications requiring big output, it effortlessly delivers rich and detailed sound with extra punch and precision. With its steel grille and optional mounting hardware the professionally presented Cuboid 15 can be fixed in either portrait or landscape mode for a flexible, simple installation. Cuboid 15 features a 15” (380mm) low frequency (LF) driver for extra bass and midband with a 1? (25mm) exit high frequency (HF) compression driver for clarity of vocal and high frequency projection. The HF section delivers consistent coverage in either plane from a user-rotatable horn. When coupled with the Zone series, a ZonePad and the WebApp makes setting up a system and end user control simple and intuitive.


- Portrait or landscape mounting options

- Rotatable high-frequency horn

- 58Hz – 18kHz frequency response ±3dB

- Maximum SPL 126dB (continuous), 132dB (peak)

- 80° horizontal x 50° vertical coverage

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Unit of MeasureEA
Unit Size1
ManufacturerOptimal Audio
AvailabilityIn Stock
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