Drivers ListSound Solutions Audio DriversXcon 18 D2

ManufactureSound Solutions Audio
Motor TypeOverhung
Driver Size18 "
Driver Weight50 lbs
Coil Diameter3 "
Coil MaterialAL
Coil Length2.6 "
Manufacture's Xmax31 mm

TS Parameters (Measured by

Fs26.4 Hz
Res2.8 Ω
Le 1khz7.16 mH
Sd0.117 m2
Vas131.8 liters
Mms524.9 grams
Cms69 μm/N
BL24.37 Tm
BL2/Res212.1 N2/W
L/R Time Constant2.56 milliseconds
SplSens89.57 dB


The Xcon 18 D2 is apparently made for SSA by the Fi Car Audio build house. Much of the materials and mechanicals are the same however there are also differences. The familiar 12 spoke cast frame powder coated black provides the skeleton for this driver. The cone is a heavy paper with a large inverted concave dust cap covering the entire front side of the cone, which is adorned with the SSA logo. The surround is a large and heavy half roll foam type. The double spider is 8 inches in diameter and has the voice coil leads sewn in. The suspension is very stiff. The voice coil is an aluminum wire wind, 3 inch diameter, in an overhung arrangement with a long wind for extra xmax. (A claimed 31mm.) The motor outwardly appears to be exactly the same as the one on the Fi Q and uses a single large diameter ferrite slug with a large deeply extended back plate with no pole vent. All pole venting appears to be from under the spiders in the frame. Any differences from the Q are probably in the voice coil itself and the gap geometry and possibly the pole piece machining. The Xcon also employs an aluminum shorting ring in the motor. rnrnThe impedance measurements and response measurements in a sealed box indicate that the driver has a good amount of motor force but a notable amount of inductance related roll off which will limit the upper bass efficiency similar to that seen in the Q18 and most other extra long throw subwoofers. Running the driver to large excursions in free air shows that the motor starts to make some air noise from the under spider vents in the frame but not really any worse than a lot of other drivers. This driver exhibits the same tapping sound that the Q18 driver exhibited but to a lesser degree. Oddly it is still noticeable at rather moderate excursions on less than 1 inch peak to peak. This seems to be a characteristic of the Fi built drivers. In box this does not to be nearly as audible, especially in a noisy car audio environment. The driver starts to make a lot of noise and a loud clattering when driven past about 2 inches peak to peak excursion. The driver is very rugged mechanically though. The short free air excursion video can be seen in the driver excursion thread in the forums. rn 


Sound Solutions Audio 18" Xcon 18 D2 Systems