Harbottle Audio C18 L1 vs Velodyne Acoustics DD-18+

Last updated: August 15, 2026

Short answer: the Harbottle Audio C18 L1 for better sound quality, the Velodyne Acoustics DD-18+ for the lower price. The Harbottle Audio C18 L1 ranks #66 of 97 subwoofers at $5331.56. The Velodyne Acoustics DD-18+ ranks #68 at $5000, $331.56 cheaper.

What the Harbottle Audio C18 L1 offers: Its documented strengths make it a credible option in this class. Watch for: Its documented strengths make it a credible option in this class.

What the Velodyne Acoustics DD-18+ offers: Its documented strengths make it a credible option in this class. Watch for: Its documented strengths make it a credible option in this class.

Buy the Harbottle Audio C18 L1 if sound quality matters more than the price. Buy the Velodyne Acoustics DD-18+ if the price matters more than sound quality.

Harbottle Audio C18 L1 vs Velodyne Acoustics DD-18+

Specifications Side By Side

Harbottle Audio C18 L1 Velodyne Acoustics DD-18+
Price$5,331.56$5,000 Discontinued
Ranked#66 of 97 in Large Powered Home Subwoofers (Over 75 lbs)#68 of 97 in Large Powered Home Subwoofers (Over 75 lbs)
Enclosureportedsealed
Output SPL at 10 Hz93.0 dB87.6 dB
Output SPL at 12.5 Hz98.0 dB92.2 dB
Output SPL at 15 Hz102.0 dB101.8 dB
Output SPL at 20 Hz108.0 dB106.4 dB
Output SPL at 25 Hz112.0 dB111.3 dB
Output SPL at 31.5 Hz117.0 dB116.0 dB
Output SPL at 40 Hz119.0 dB118.8 dB
Output SPL at 50 Hz119.0 dB119.8 dB
Output SPL at 63 Hz118.0 dB118.3 dB
Output SPL at 80 Hz118.0 dB116.5 dB
Output SPL at 100 Hz117.5 dB115.1 dB
Output SPL at 125 Hz117.0 dB113.5 dB
CEA-2010-A Average (40-80Hz)118.5 dB118.3 dB
Dimensions26.4"H x 22.8"W x 18.1"D (670.1 x 578.1 x 460.0 mm)22.7"H x 20.7"W x 25.6"D (576.6 x 525.8 x 650.2 mm)
Weight86 lbs / 39.0 kg142 lbs / 64.4 kg
Cabinet Colorblack, white, red, blueblack, wood
CountryCanadaUnited States
Measurement SourceManufacturerAudioholics
Drivers18" (457mm) driver18" (457mm) driver
Discontinued-Yes

More useful head-to-heads from the same speaker class:

The Two Speakers In Full

Harbottle Audio C18 L1: $5,331.56

Harbottle Audio C18 L1 ranking card

Full Harbottle Audio C18 L1 review and specifications →

CEA-2010-A Average (40-80Hz)118.5 dB
Cabinet Colorblack, white, red, blue
CountryCanada
Dimensions26.4"H x 22.8"W x 18.1"D (670.1 x 578.1 x 460.0 mm)
Drivers18" (457mm) driver
Enclosureported
Measurement SourceManufacturer
Output SPL at 10 Hz93.0 dB
Output SPL at 12.5 Hz98.0 dB
Output SPL at 15 Hz102.0 dB
Output SPL at 20 Hz108.0 dB
Output SPL at 25 Hz112.0 dB
Output SPL at 31.5 Hz117.0 dB
Output SPL at 40 Hz119.0 dB
Output SPL at 50 Hz119.0 dB
Output SPL at 63 Hz118.0 dB
Output SPL at 80 Hz118.0 dB
Output SPL at 100 Hz117.5 dB
Output SPL at 125 Hz117.0 dB
Weight86 lbs / 39.0 kg
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Velodyne Acoustics DD-18+: $5,000 Discontinued

Velodyne Acoustics DD-18+ ranking card

Cons: Discontinued.

Full Velodyne Acoustics DD-18+ review and specifications →

CEA-2010-A Average (40-80Hz)118.3 dB
Cabinet Colorblack, wood
CountryUnited States
Dimensions22.7"H x 20.7"W x 25.6"D (576.6 x 525.8 x 650.2 mm)
DiscontinuedYes
Drivers18" (457mm) driver
Enclosuresealed
Measurement SourceAudioholics
Output SPL at 10 Hz87.6 dB
Output SPL at 12.5 Hz92.2 dB
Output SPL at 15 Hz101.8 dB
Output SPL at 20 Hz106.4 dB
Output SPL at 25 Hz111.3 dB
Output SPL at 31.5 Hz116.0 dB
Output SPL at 40 Hz118.8 dB
Output SPL at 50 Hz119.8 dB
Output SPL at 63 Hz118.3 dB
Output SPL at 80 Hz116.5 dB
Output SPL at 100 Hz115.1 dB
Output SPL at 125 Hz113.5 dB
Weight142 lbs / 64.4 kg
Search eBay for Velodyne Acoustics DD-18+ →Search used audio listings for Velodyne Acoustics DD-18+ →

As an eBay Partner, we may be compensated if you make a purchase.