The most important and most forgotten about subject in getting reliable and high quality distributed audio is arguably impedance matching...Forget these fundamentals and you will open up a host of issues!
The SS-4.2 allows you to switch up to four speaker pairs connected to a stereo amplifier. Offering high-quality audio performance, it also provides overload protection and long-term reliability.
The SS-4.2 offers two operating configurations: Impedance Matching and Bypass. Impedance-matching mode provides automatic overload protection for use even with high-power amplifiers. This mode allows multiple pairs of speakers to be safely connected to an amplifier using the built-in automatic impedance-matching circuitry.
Bypass mode is used for direct speaker switching with remote impedance-matching volume controls. This allows local control in each room as well as higher efficiency; however, in this mode the impedance matching and overload protection are not engaged.
Designed for use with 8-ohm loudspeakers, the SS-4.2 also provides safe connection to bridged amplifiers and even works in applications where there is a floating ground. It has spring-loaded speaker terminals for quick connection and can accommodate speaker wire up to 12 gauge.
Russound SS-4.2 - Impedance Matching Single Source Four Pair Speaker Selector Features & Benefits:
Designed for quality audio performance and long-term reliability
Impedance matching and automatic overload protection compatible with high-powered amplifiers
Bypass mode for higher efficiency when using remote impedance-matching volume controls
Isolated inputs provide safe connection to bridge or floating type amplifiers
Spring-loaded speaker terminals accommodate up to 12-gauge wire
Designed for use with 8 ohm speakers
Russound SS-4.2 - Impedance Matching Single Source Four Pair Speaker Selector Specifications:
Power Handling: 200 W/CH peak, 100 W/CH RMS
Frequency Response: +/- 0dB 20Hz to 20kHz
Wire Gauge: 16 AWG to 12 AWG standard speaker wire
Dimensions: 8.5"W X 1.80"H X 6.25"D (216 x 45 x 159 mm)
Weight: 2.75 lb.(1.2 kg)