The ISM4, ISM6 and ISM8 are low-profile speaker distribution systems with individual on/off selectors for each listening zone which distribute one stereo speaker-level signal to eight, six or four stereo listening zones. The ISM Series also provides manual power protection that is activated from the rear panel.
 

The manual power protection switch engages 10 ohm /15 watt resistors wired in parallel, three per channel in the ISM8 or two per channel in the ISM6/ISM4 providing higher power handling capability than the competition (able to handle up to 50% more power!) in order to protect your amplifier. All ISM’s are capable of handling 140 watts per channel total input power without the manual protection engaged and 70 watts per channel with the protection engaged.
 

The spring-loaded guillotine-style push terminals accept up to 14 gauge cable. A daisy-chain output terminal allows you to connect several speaker selectors together for almost limitless combinations! The ISM’s feature 16 gauge steel construction with our durable black wrinkle powder coating and gray silk-screening. Each unit is provided with an in-depth instruction sheet and die cut labels that fit the recessed area on the buttons for labeling each zone. The 8.5" chassis width of the ISM4 combines with other 8.5" wide Phoenix Gold components (which will be available in the future) to make a standard 17" wide unit.