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SI Mag Subwoofers
The best just got better.
Throughout
Stereo Integrity's career, there have been four different variations of
our Mag series subwoofers. What you are about to read about is our
most technologically advanced, best sounding, loudest subwoofer to date.
The motor
of a subwoofer is one of the most critical aspects of subwoofer
performance. The SI Mag D2 subwoofers have a custom-tooled motor
that allows for over 26mm of one-way linear travel, plenty of motor force,
and a large enough voice coil to smother a Coke can. Motor force is
+/- 18 Tm for both sizes of our Mag subwoofers. The combination of
our light moving mass and ample motor strength give us a winning
combination for a true "SQL" subwoofer - one that can do both sound
quality and SPL.
Mag
subwoofers use a proprietary blend of materials in the cone, which yields
a very high strength-to-weight ratio. Surround material is treated
foam for longevity and elasticity and is wide/tall enough to accommodate the Mag's 3 inch peak-to-peak throw. Dual 8 inch progressive roll
spiders provide most of the mechanical restoring force.
Sure we
could have gone with less expensive (or even MORE expensive) materials,
but that would have jeopardized the integrity of Mag subwoofers. You
see, building a well rounded subwoofer is like building a well rounded
race car; you can have the best handling chassis in the world, but if
you've got a wimpy motor you're not going to win races. Subwoofers
are all about balance too. The cone, spiders, surround, basket,
motor, etc, was chosen and/or developed to bring you the loudest best
sounding subwoofer money can buy.
Like
releasing a friendly, approachable, but mildly deranged ape into the
community, the SI Mag's have left their mark in the SPL competition scene. SPL
numbers such as 156 dB in the stock
division of SLAP, 154 dB in MECA's M4 class, 152.2 dB (a new world record)
in MECA S1, 146 dB in the NSPL
regular cab truck class of SLAP, 154.4 dB in MECA M5 (an all-time UK
record) and an astounding 141.7 dB at 10 Hz are just a few of the
results our Mag subwoofers have been able to accomplish.
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T/S parameters: |
12 inch |
15 inch |
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Re (coils in series) |
3.5 |
3.5 |
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Fs |
30.2 |
22 |
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Le |
3.5 |
3.7 |
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Qms |
4.7 |
3.7 |
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Qes |
0.45 |
0.39 |
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Qts |
0.41 |
0.35 |
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Cms |
121 |
197 |
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Mms (grams) |
228 |
262 |
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Vas (liters) |
39.7 |
184 |
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Sd (cm^2) |
480 |
810 |
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BL |
18.35 |
18.35 |
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SPL (1W/1M) |
85.7 |
88.8 |
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Power handling RMS |
900 |
950 |
All Mag D2 subwooers are DUAL 2 OHM.
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Recommended enclosures: |
12 inch |
15 inch |
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Sealed |
1 to 1.3 ft^3 |
2.3 to 3 ft^3 |
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Ported |
2 ft^3 tuned to 32 Hz |
3.5 ft^3 tuned to 30 Hz |
The enclosure volumes above are after port and driver
displacement.
Cutout diameter for the Mag 12 is 11 1/16" and the Mag 15 is 14"
Mounting depth on the Mag 12 is 6 3/4" and the Mag 15 is 8"
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