The Optimal Audio Cuboid 5 ranks #28 out of 33 total Line Array and Installation PA Speakers for sound quality. See all PA & Live Sound rankings for every top pick.
Brand: Optimal
Prices on this page were last checked October 7, 2026 at 9:25 PM UTC. Product prices and availability are accurate as of that date/time and are subject to change; the price and availability shown on Amazon at the time of purchase will apply to the purchase of this product.
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#28 Optimal Audio Cuboid 5: $110 each eBay
Same family: the Optimal Audio Cuboid 3 (smaller model, ranked lower, rated 2.3/5).
Pros: A compact installation speaker from Optimal Audio with a 5” coaxial driver. Optimal Audio’s measurements show a preference score of 0.27 that reaches 3.94 with an ideal subwoofer, with 0.74 listening window deviation.
Cons: Bass is very limited, so it needs a subwoofer, and the on-axis response is uneven (1.15 average deviation). That data is low quality and comes from Optimal Audio. Bass reaches 122.0Hz (-3dB) and about 92Hz (-10dB). That data is low quality.
Related speakers: Optimal Audio Cuboid 3.
How it compares: Just above it: Yamaha VXL1-24 - $1230 more. Just below it: Electro-Voice EVID-S4.2 - $130 more.
| Bass Extension (-10dB) | about 91.5Hz (measured, manufacturer data via spinorama.org) |
|---|---|
| Bass Extension (-3dB) | 122.0Hz (measured, manufacturer data via spinorama.org) |
| Bluetooth | No |
| DIY Kit | No |
| Drivers | 5” coaxial driver |
| Spinorama Preference Score | 0.27 |
| Spinorama Preference Score with Perfect Sub | 3.94 |
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