Bi wirable or bi amp. Reluctant sale but they are now surplus to requirements. Since listing these, one of the vifa M21WN-07 drivers has a damaged coil.
It will either need to be repaired or replaced. Price has been adjusted accordingly.Good description and review here. This item is in the category "Sound & Vision\Home Audio & HiFi Separates\Speakers & Subwoofers".
The seller is "filbaw" and is located in this country: GB. This item can be shipped to United Kingdom.