Coverage note. Speaker Ranking currently covers 2 Optimal models across pa speakers. These are the products in our database, not a complete list of everything Optimal makes.
What this page covers. The Optimal models ranked here span pa speakers, including Optimal Audio Cuboid 5 and Optimal Audio Cuboid 3. Use each model’s category position to compare it with alternatives of the same size and use case.
This page lists all 2 Optimal speakers ranked on this site across pa speakers. Each model is shown in the category where it competes, with its current rank and the size of that ranking.
Use the category position rather than the brand name alone: speakers from the same manufacturer can perform very differently by size, price and product family.
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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Line Array and Installation PA Speakers
Ranked #28 of 33 in Line Array and Installation PA Speakers - 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.
Full Optimal Audio Cuboid 5 review and specifications →
| 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 |
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons
Ranked #31 of 33 in Line Array and Installation PA Speakers - 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.
Full Optimal Audio Cuboid 3 review and specifications →
| 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 |
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons