DD Audio SL612 D2

The SL600 series subwoofers, which include the DD Audio HI-DEF SL612 12″ (30cm) flat subwoofer, feature a very shallow mounting depth, and the suspensions have been tuned to perform exceptionally well in sealed and small bass-reflex enclosures.

To ensure high power handling, good cooling and large excursion, the SL600 subwoofers feature 2.5-inch high-temperature voice coils, 72-ounce magnets, rear panel coil venting and an EROM surround.
One of the unique features of the SL600 is the three-layer, low-profile diaphragm cone. By compressing a layer of foam between two layers of cellulose, the cone is as light and stiff as a standard cone, yet flat enough to allow a suspension travel equivalent to that of a full-sized subwoofer.

Features:

12″ (30cm) subwoofer with EROM surround.
High temperature 2.5″ voice coil
Double layer spider system
Three-layer flat diaphragm body
72oz magnet
Coil gap ventilation at rear plate
DD cast aluminum frame
Speaker size (In): 12
Watts RMS: 300 – 600
Watt peak power: 1200
Impedance: D2
Voice coil (inch): 2.5
Data:

Fs (Hz): 27
Qms: 7.906
Qes: 0.432
Qts: 0.409
Vas: 68.349
Xmech (MM): 40
Xmax (MM): 14.5
Dimensions:

Frame outer diameter (cm): 31.9
Frame outer diameter with gasket(cm): 32.5
Mounting diameter(cm): 28.7
Mounting depth(cm): 10.5
Engine diameter(cm): 16,51
Motor depth(cm): 3.81
woofer displacement : 0.06 litre
Shipping weight: 8 kg
Enclosure Recommendation:

Closed cabinet : 22.5-42 litres
Bass reflex cabinet : 28-50 litres.