User manual RUSSOUND ACP-1DU 1

[. . . ] The chart indicates the jumper setting should be set at 8X. UltraMatchTM The UltraMatchTM Volume Control connects between the speaker outputs of an amplifier or receiver and a pair of speakers. The UltraMatchTM volume control provides a method of matching the minimum output impedance of the amplifier or receiver, in addition to adjusting volume. The volume is adjusted by attenuating the amplifier signal output of the control to the speakers. 4 Ohm Pairs Jumper Settings for Impedance Matching By determining the drive capability of the amplifier with a few simple calculations, the number of speakers the system can safely operate can be determined as well. [. . . ] Accidental damage and shipping damage are not considered defects under the terms of the warranty. Russound assumes no responsibility for defects resulting from abuse or servicing performed by an agency or person not specifically authorized in writing by Russound. Damage to or destruction of components due to improper use voids the warranty. In these cases, the repair will be made at the owner's expense. Fig. 1 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 Impedance Matching For 8 Ohm Amplifiers 8 Ohm Pairs 0 1 2 3 4 0 2X 4X 8X 8X 1 1X 4X 8X 8X 2345678 2X 4X 4X 8X 8X 8X 8X 4X 8X 8X 8X 8X 8X 8X 8X 8X Warranty · Dimensions: 2-5/8" W x 1-3/4" H x 2-5/8" D (fits standard double-gang junction box) · Connectors: Removable modular snap type Accepts up to 14 gauge wire · Attenuation: 12 steps, including "off" Total attenuation of 43dB · Frequency Response: · Power Rating: 126W, 42W RMS, continuous per channel Specifications 20 Hz to 20 kHz 5 Forbes Rd. Newmarket, NH 03857, USA Tel 603. 659. 5170 · Fax 603. 659. 5388 e-mail: tech@russound. com 28-0029 Rev. 1 Wall Mount Stereo Volume Control with A / B Switch Instruction Manual ACP-1DU Jumper Settings for Impedance Matching (continued) 3. 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. Follow the appropriate row and column to determine jumper settings. Set the jumpers to the appropriate X setting as shown in Figure 2. NOTE: To avoid problems with certain types of amplifiers employing bridging outputs or isolated grounds, the L and R (-) grounds are separate. If a 3 wire system or common ground amplifier is used, the L- and the R- inputs of the ACP-1DU should be jumpered together. If one channel ground is open, that channel will appear to drop out when the volume control is rotated. The L- and the R- connections are placed adjacent to enable this type of connection, and to reduce short circuits. The ACP-1DU comes with the AB-1. 2 Speaker Out connector prewired to the volume control Input connector. Connect the left speaker L+ and L- wire leads to the corresponding marked openings in the volume control's Output connector. Connect the right speaker's leads in the same manner, observing channel and polarity identification. [. . . ] If necessary, twist the exposed conductors to ensure that no loose strands exist. Connect the leads from the "A" amplifier to the Amp "A" Input snap connector, with the left (L+ and L-) and right (R+ and R-) wires inserted in the appropriately marked openings in the connector. Snap the lever down on the connector, making sure that the exposed bare wire is engaged. [. . . ]