New Madrid™ - 18" Aluminum frame Subwoofer Driver Speaker

18" Woofer/Speaker at 750 RMS - 1500 Peak Speaker Magnet is 240 ounces (Dual 120 oz) Driver has a 4" Voice Coil Speaker Impedance is 8 Ohm
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Whether you are building your own speaker cabinet or replacing an old woofer, this 18" speaker woofer is what you need! The New Madrid™ 18 is a great woofer that produces awesome tone with punchy lows and clear, clean highs! At 750 Watts RMS, this speaker can handle what most amps can throw at it. Great woofers are very hard to find, especially at a decent price. The Seismic Audio brand was designed to make the professional musician, as well as the musician low on cash, sound great. With your purchase, you will receive a one New Madrid 18" aluminum frame speaker driver pictured and described above. So, put it in your cart today and get ready for years of trouble-free, crystal clear sound!


New Madrid 18
18 Inch Subwoofer
18 Inch Replacement Subwoofer | Speaker
Power Rating
750 Watts RMS - 1500 Watts Peak
Nominal Impedance
8 Ohms
Frequency Range
102 dB
Magnet Weight
2 x 120 ounce
Voice Coil
Chassis Type
Die Cast Aluminum
Paper Cone/Cloth Edge
Mounting Information
Cut Out Diameter: 16 3/4" Diameter: 18 5/8" Magnet Structure Diameter: 8 5/8" Mounting Slot Dimensions: 1/4", 0.25" Number of Mounting Slots: 8 Overall Depth: 8 5/8"
TS Parameters
Resonant Frequency (fs): 48Hz DC Resistance (Re): 9.5 Ohm Mechanical Q (Qms): 2.3 Electromagnetic Q (Qes): 1.1 Total Q (Qts): 0.75 Compliance Equivalent Volume (Vas): 157.7 Ltr Mechanical Compliance of Suspension (Cms): 63mm/N BL Product (BL): 21.2 Tm Diaphragm Mass Airload (Mms): 173.5g Surface Area of Cone (Sd): 1.3k cm2
36 lbs
One Year Warranty
Technical Specs
Frequency Response 8?

New Madrid 18 Frequency Response Chart


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We realize that you want your Pro Audio Equipment yesterday. Here at Seismic Audio Speakers, we aim to ship items out immediately. If you place your order before 2:30 Central time, we will ship your pro audio equipment on the very same business day.
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