- Incredibly powerful 18“ 4th generation driver with carbon fiber cone and over 4” peak-to-peak excursion *
- 4,000 watt amplifier (sustained power) *
- 17-180Hz +/-0.75dB (strong 9 Hz typical in-room response).
- Solid enclosure overbuilt using high quality 3/4" Baltic Birch plywood (more info on FAQs page). *
- Round, flush inset grille with black grill cloth included. Grille is held firmly with magnets.
- Rubber feet are included with threaded inserts configured in a tripod orientation (2 front, 1 back). The tripod orientation ensures the subwoofer will not be affected by an uneven floor while still providing an incredibly sturdy base and inert cabinet.
- 21" x 21" x 20"D
- 47 pounds - Enclosure only
- 145 pounds - Fully assembled subwoofer (amp+driver)
- 180 pounds - Shipping weight
- 3.3 cu. ft. internal airspace for the enclosure
* Built in America with globally sourced components
Finishes
A Duratex durable coating is the standard finish. Maple, oak, and walnut are standard available veneers. Other veneers may be available, please contact us for details.
For our veneered subwoofers, our standard stain colors are Natural, Golden Brown, Light Brown, Orange, Cherry, Dark Brown, Rosewood, Espresso, and Black. We can also do custom colors to match items such as cabinets or furniture.
Measurements
Ground plane measurements taken in the middle of a field with the microphone 2 m from the subwoofer. More information on measurement equipment and process can be found on the FAQs page.
CEA 2010-A Test Results
CEA 2010-A test results can generally be compared but they shouldn't be used as absolute comparisons as there will be differences between test setups and different sets of measurements. Our measurements follow the CEA 2010-A specifications since historically, more measurements utilize this standard vs the newer and less stringent CEA 2010-B test standards. Even though we follow the CEA 2010-A results, we do provide additional test results for 8, 10, 12.5, and 16 Hz since our subwoofers have capability well below the standard 20 Hz.
These results are out in the middle of a field to ensure no reflections interfere with the results. In a room, the bass below 20 Hz will be reinforced because the bass waves won't easily leave a room. With room-reinforced bass, the Mariana 18S is flat to 9 Hz in a room with reference level output.
| Frequency |
SPL at 2 m (dB) |
SPL at 1 m (dB) |
| 8 | 93.3 | 102.3 |
| 10 | 97.0 | 106.0 |
| 12.5 | 100.8 | 109.8 |
| 16 | 105.5 | 114.5 |
| 20 | 109.4 | 118.4 |
| 25 | 113.7 | 122.7 |
| 31.5 | 117.3 | 126.3 |
| 40 | 120.1 | 129.1 |
| 50 | 121.4 | 130.4 |
| 63 | 122.9 | 131.9 |
| 80 | 123.8 | 132.8 |
| 100 | 123.7 | 132.7 |
| 125 | 123.7 | 132.7 |
- Amplifier - SP1-4000 (4,000w)
- Microphone - Earthworks M50
- Hardware - Clio FW-02
- Software - Clio Standard 12.54
- Temp - 74°
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Humidity - 62%