The Vandersteen 2W and 2Wq are designed to be used with separate preamp and power amp. A resistor is inserted at the inputs of the power amp to cut off low frequencies to the main speakers and relieving the amp from trying to produce those low frequencies. The subwoofer is then fed a sample signal from the outputs of the amp via speaker wire to the sub. To my knowledge this is the only method of using the Vandersteen 2W and 2Wq.
The 2W is the oldest version of the Vandersteen subwoofers and shows up used more often and the condition varies. The 2Wq is the later version with even more flexability. This is the reason for the difference in price that you have noticed.
The 2W is the oldest version of the Vandersteen subwoofers and shows up used more often and the condition varies. The 2Wq is the later version with even more flexability. This is the reason for the difference in price that you have noticed.