The Harman Kardon HKS-9 is a pair of 2-way surround channel speakers from Harman Kardon's HKTS Series. The speakers are meant to be used along with any 5.1 channel speaker system, such as Harman Kardon's HKTS-18, to upgrade the system to 7.1 channel surround. The speakers feature dual 3" midrange drivers, a 3/4" dome tweeter, and are capable of producing up to 120 watts of power. They are magnetically shielded allowing them to be placed near video monitors. The HKS-9 come with colour-coded speaker cables for easy installation of the speakers in the rear surround speaker positions as well as wall-mount brackets and leatherette coasters. The speakers are more advanced than Harman Kardon's HKS-6 since they have a wider frequency range, higher power output and dual midrange drivers as opposed to the single midrange driver of the HKS-6. The speakers are also about 3" taller than the HKS-6, at approximately 9.5" tall.