Atlantic Technology 1400SRZ-P-BLK Dipole-Bipole Surround Speakers (Pair, Black) Sealed box, Dipole/Bipole surround Featuring two 3-1/2-Inch Poly-treated High Frequency Assitive Radiator woofers Easily wall-mounted with built-in keyhole mounts Magnetically attached metal grilles Compact size that delivers the sound performance of larger speakers