THE WORLD'S MOST POWERFUL SUBWOOFER.
All ServoDrive loudspeakers incorporate a unique, patented operating principle involving the substitution of high-speed rotary servo-motor and belt-drive system for the traditional loudspeaker voice coil/magnet transducer system. The concept was created by renowned engineer, Thomas Danley. In the years since their introduction, ServoDrive subwoofers have heightened the awareness of the tremendous effect massive low frequencies have in both fixed installations and touring sound applications.
All ServoDrive loudspeakers incorporate a unique, patented operating principle involving the substitution of high-speed rotary servo-motor and belt-drive system for the traditional loudspeaker voice coil/magnet transducer system. The concept was created by renowned engineer, Thomas Danley. In the years since their introduction, ServoDrive subwoofers have heightened the awareness of the tremendous effect massive low frequencies have in both fixed installations and touring sound applications.
ServoDrive's BassTech 7s provide more sound pressure level capability than any other subwoofer on the market. Features include: exceptionally low harmonic distortion, true high-fidelity performance, virtually no output loss due to power compression, frequency response virtually flat to below 28Hz, extraordinarily efficient - low power requirement for full SPL output. The BassTech 7s display smooth frequency response (essentially flat from crossover frequency down to 28Hz). Revolutionary motor-driven belt design increases linear excursion and efficiency, handles large low-frequency peaks without damage or sonic compromise.
The BassTech 7s have been on tour with the Rolling Stones, Michael Jackson, U2, Garth Brooks, Phish, and Lyle Lovett. From Super Bowl half-time shows, to Disney World, Universal Studios, the Mirage Volcano, Buccaneer Bay at Treasure Island, Crystal Cathedral, and Blumenthal Theater - wherever crowds gather, these subwoofers are guaranteed to bring a new level of excitement!
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9 - High quality dual 18” 4 - ServoDrive BassTech 7,
driver, vented box servomotor driven, horn
subwoofers with high loaded subwoofers, with low
powered amplification. powered amplification.
Required power = 5400 watts vs. Required power = 1600 watts
Frontal dimensions = 108” x 108” vs. Frontal dimensions = 45” x 96”
System weight = 2000 lbs. vs. System weight = 920 lbs.
Truck packing volume = 189 cu. ft. vs. Truck packing volume = 105 cu. ft.
Amplifier dollars = $4,320.00 vs. Amplifier dollars = $1,280.00
(at $.80 cents per watt) (at $.80 cents per watt)
Harmonic Distortion = 2% to 20% vs. Harmonic Distortion = 0.5% to 1.5% MAX.
(typical at full rated power) (typical at full rated power)
Power compression = 4db to 6db vs. Power compression = Less than 1.5db
(typical at full rated power) (typical at full rated power)
Sound level at ten meters = 122db vs. Sound level at ten meters = 124db
(measured at full rated power before power compression) (measured at full rated power before power compression)
Amplifier Capacity
Continuous Power
(per modified AES procedure, 24 hrs.) 400 Watts RMS
Musical Peak Power Capacity
(<15 seconds) 800 Watts RMS
(per modified AES procedure, 24 hrs.) 400 Watts RMS
Musical Peak Power Capacity
(<15 seconds) 800 Watts RMS
Power Compression
Full power after 15 minutes <1.5dB
2x full power after 15 seconds <2dB
2x full power after 15 seconds <2dB
Nominal Impedance
4 Ohms
Sensitivity
Spectrum (28-125Hz) 2 units - 107.5dB (1W, 1m)
(1/2 space, groundplane) 4 units - 110.0dB (1W, 1m)
(1/2 space, groundplane) 4 units - 110.0dB (1W, 1m)
Sound Pressure Level
Full Rated Power (28-125Hz)
(1/2 space, groundplane)
(1/2 space, groundplane)
2 units - 136dB
4 units - 142dB
(Peak SPL: +3dB)
4 units - 142dB
(Peak SPL: +3dB)
Low Frequency Corner (-3dB)
2 units - 30Hz
4 units - 28Hz
4 units - 28Hz
Distortion, Full Rated Power
Second Harmonic, 28-125Hz <1% typical
Third Harmonic, 28-125Hz <1% typical
Third Harmonic, 28-125Hz <1% typical
Radiators
2-15" pistons
Maximum Excursion/Driver
>1" peak-to-peak linear excursion +3dB excursion headroom at 400 watts/30 Hz
Crossover Slope
Recommended
>18dB per Octave @ <125Hz
Dimensions & Weight
45" x 45" x 22.5" - 230 lbs.
Finish and Features
Black "TNT" indoor-outdoor carpeting
Enclosure Construction
•14-ply Baltic Birch with extensive bracing
•27 Hz Hyperbolic Flare T=.55
•Horn Length 10.6 feet
•27 Hz Hyperbolic Flare T=.55
•Horn Length 10.6 feet
Horn Throat Compression Ration
3.4 to 1
Connectors
Neutrik "Speakon" or EP4
Options
•Dolly Tray
•Custom Connectors
•Custom Handles
•Painted (Texlac)
•Fiberglass
•Custom Connectors
•Custom Handles
•Painted (Texlac)
•Fiberglass
