Originally Posted by lilmike
The model is the same (SWS), the D2 and D4 are just the impedance.
D2 = Dual 2 ohm coils, D4 = Dual 4 ohm coils.
Get the one that is a better fit for your amplifier, they're essentially interchangeable in this cabinet.
IIRC, from the mouth of the engineer, the D2 has a slight bit more thermal capability from a bit better heat transfer ( same gap / pole / motor ) from tighter clearances.
Ask your doctor if DIY is right for you. Side effects of DIY may include anxiety, elevated blood pressure, lightheadedness, rapid heartbeat, skeletal muscle flaccidity, euphoria, psychological dependence, insomnia, confusion, blurred vision, impulsivity, uncontrolled or repeated movements.