Exodus Audio
Owner’s Guide 2
Exodus Audio
Owner’s Guide 2
Copyright 2007 Exodus Audio. All Rights Reserved.
Introduction
Congratulations! You have made a wise purchase. The Maelstrom-21” is one of the world’s
best subwoofers utilizing a patented XBL^2 motor technology, advanced inductance rings to
minimize distortion and class-leading output capability.
Great. How do I put it to use?
We offer some basic guidance in suitable enclosures. Follow our guidelines, and you will get
great results whether you build a ported, passive radiator or sealed design. All designs
have their tradeoffs so we will explain some of those in each application notes.
Performance
Operational Specifications: Measured with Praxis @ sea level, @ 55 deg F., drive voltage
>1.5V. The driver is broken-in with 12 Hours of operation with a 20Hz sine wave near full
excursion. A 12AWG jumper cable is used to connect the voice coils. The Maelstrom uses
a dual 2-ohm configuration.
Parameter Single Coil Parallel Series
Re: 1.9 Ohm 0.95 Ohm 3.8 Ohm
Le: 2.0mH 1.0mH 4.0mH
Fs: 16.3Hz 16.3Hz 16.3Hz
Qms: 3.38 3.38 3.38
Qes: 0.88 0.44 0.44
Qts: 0.7 0.42 0.42
Mms: 527g 527g 527g
Cms: 0.18 mm/N 0.18mm/N 0.18mm/N
Sd: 1550 cm^2 1550 cm^2 1550 cm^2
Vas: 605L 605L 605L
BL: 10.75 10.75 21.5
X-Max: 30% down point on BL Curve 32mm 32mm 32mm
Pmax: (Read our notes on power
handling)
1500W 1500W 1500W
SPL: 89.6 dB 1W/1M (coils in series)
Volume Occupied by Driver .2 cubic feet
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