User manual RUSSOUND ACP-1DU

[. . . ] Be sure to pack in a corrugated container with at least 3 inches of resilient material to protect the unit from damage in transit. Wiring Instructions (Refer to Diagram) CAUTION: DO NOT REVERSE THE INPUT AND OUTPUT CONNECTIONS! STEP 1: Strip about 1/4" of insulation from the ends of all wires to be connected to the attenuator. If necessary, twist the exposed conductors to ensure that no loose strands exist. STEP 2: Connect the leads from the "A" AMPLIFIER to one of the connectors labeled INPUT, with the left L+ and L- wires inserted in the appropriately marked openings in the plug. Tighten the screws firmly, making sure that the exposed bare wire is engaged, not the insulation! L+ L­ R­ R+ L+ L­ R­ R+ L+ L­ R­ R+ AMPLIFIER/RECEIVER 5 Forbes Rd. [. . . ] This product allows you local selection and volume control of one of two amplifiers (sources) through a single pair of speakers, available in a Decora® style double-gang plate. The volume control is ideal for residential or commercial application. It can be used with 4 to 8 Ohm speakers. The A / B switch is equipped with screw terminal modular connectors for ease of installation. These connectors may be pre-wired separately and simply plugged in. The interlocking feature assures that the connection is safe and permanent. Connectors are packaged and supplied separately. Fig 2 Impedance Matching Charts For UltraMatchTM Impedance Matching For 4 Ohm Amplifiers 8 Ohm Pairs 0 1 2 3 4 5 6 7 8 0 1X 2X 4X 4X 8X 8X 8X 8X 1 1X 2X 4X 4X 8X 8X 8X 8X 2 1X 2X 4X 4X 8X 8X 8X 8X 3 2X 4X 4X 8X 8X 8X 8X 4 2X 4X 4X 8X 8X 8X 8X 5 4X 4X 8X 8X 8X 8X 6 4X 4X 8X 8X 8X 8X 7 4X 8X 8X 8X 8X 8 4X 8X 8X 8X 8X 9 8X 8X 8X 8X 10 8X 8X 8X 8X 11 8X 8X 8X 12 13 14 15 16 8X 8X 8X 8X 8X 8X 8X 8X 8X UltraMatchTM The UltraMatchTM Volume Control you have just purchased conJumper nects between the speaker outputs of an amplifier or receiver and a Settings On Circuit Boards pair of speakers. The 1X setting allows the volume control to be used as a standard control. The 2X, 4X, and 8X settings allow it to be used as an UltraMatchTM control. The UltraMatchTM volume control provides a method of matching the minimum output impedance of the amplifier or receiver, in addition to adjusting X1 volume. It eliminates the need for a speaker selector or impedance matching equipment. The volume is adjusted by attenuating the amplifier signal output of the control to the speakers. All Russound Volume Controls are manufactured using a high-quality autoformer design which provides long life, excellent frequency response, no heat build-up, and maximum power transfer from the amplifier to the speakers. All Russound volume controls X2 conform to UL Standard 1492 First Edition, and for Canada Certified to CSA Standard 22. 2 No. This certification assures that your volume control has been designed and tested for safety. 8X 4X X 1X-2X-8X 2X-4 1X 8X 4X X 1X-2X-8X 2X-4 1X 8X 4X X 1X-2X-8X 2X-4 1X 8X 4X X 1X-2X-8X 2X-4 1X 4 Ohm Pairs Impedance Matching For 8 Ohm Amplifiers 8 Ohm Pairs 0 1 2 3 4 0 2X 4X 8X 8X Example: The table to the right shows an 8 ohm minimum impedance amplifier with 1 pair of 4 ohm speakers and 3 pair of 8 ohm speakers. The chart indicates the jumper setting should be set at 8X 8X 4X X 1X-2X-8X 2X-4 1X X4 8X 4X X 1X-2X-8X 2X-4 1X Russound UltraMatchTM volume controls eliminate the need for a speaker selector. By determining the drive capability of the amplifier with a few simple calculations, we can determine the number of speakers the system can safely operate. CONSIDERATIONS 8X 4X X 1X-2X-8X 2X-4 1X X8 DETERMINING THE PROPER JUMPER SETTING FOR IMPEDANCE MATCHING 8X 4X X 1X-2X-8X 2X-4 1X 1. Make sure that your amplifier has adequate wattage for the number of speakers. Watts per channel divided by the number of pairs should equal or exceed the individual speaker's minimum wattage requirements. [. . . ] If your amplifier is 6 ohm stable, use the 8 ohm chart. Determine the impedance for each pair of speakers by referring to its manual. Determine the total number of 4 ohm pairs of speakers. Determine the total number of 8 ohm pairs of speakers. [. . . ]