Edit: Sub and Amp are Sold I am selling my SVS 20-39 CS sub with s700 amp. I no longer have the boxes so I am looking for a local pickup. If you are within 100 miles of Anaheim, California I will meet you half-way for pickup. The sub and amplifier are in great condition. The sub was made before the newer ISD drivers were used. However, I have never found the base lacking in any way nor has it ever bottomed out. Of course you can upgrade the driver to an ISD or even a PLUS later on if you want. I am asking $550 for both the sub and amp. Please contact me at [brett77 AT dslextreme.com]. Thanks.