DD Audio SL612 D4

The REDLINE SW Series subwoofers offer extreme bass and value. These Hi Def Tuned subwoofers work great in sealed and small vented enclosures, on low to moderate power levels. They’re equipped with all the performance features needed to handle the rigors of daily pounding, and they are available in two impedance options so they can be matched to any DD Audio amplifier.

Features
High Temp 2” Voice Coil
DVC 2 Ohm, DVC 4 Ohm
EROM Surround
Vented Stamped Steel Frame
Vented Backplate
Push Terminals

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: D4
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.