The Optimal Audio Cuboid 3 ranks #31 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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#31 Optimal Audio Cuboid 3: $85 each eBay
Same family: the Optimal Audio Cuboid 5 (larger model, ranked higher, rated 2.5/5).
Pros: A tiny installation speaker from Optimal Audio with a 3” driver. Optimal Audio’s measurements show a preference score of -0.18 that reaches 3.43 with an ideal subwoofer, with 0.82 listening window deviation.
Cons: Bass is very limited, so it needs a subwoofer, and the on-axis response is very uneven (2.07 average deviation). That data is low quality and comes from Optimal Audio. Bass reaches 115.0Hz (-3dB) and about 82Hz (-10dB). That data is low quality.
Related speakers: Optimal Audio Cuboid 5.
How it compares: Just above it: Bose DesignMax DM8S - $674 more. Just below it: Bose DesignMax DM6SE - $851 more.
| Bass Extension (-10dB) | about 82.4Hz (measured, manufacturer data via spinorama.org) |
|---|---|
| Bass Extension (-3dB) | 115.0Hz (measured, manufacturer data via spinorama.org) |
| Bluetooth | No |
| DIY Kit | No |
| Drivers | 3” driver |
| Spinorama Preference Score | -0.18 |
| Spinorama Preference Score with Perfect Sub | 3.43 |
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