User manual PARASOUND SPS140

[. . . ] For example, you may have pairs of speakers in the living room, dining room, kitchen and patio that you want to drive with a single amplifier. The S/PS-140 gives you the capability of switching on any or all four pairs of these speakers depending on where you want to hear music. Unpacking the S/PS-140 Unpack your S/PS-140 and save the carton and packing inserts for safe transport in case you move or in case the unit should ever require repair. [. . . ] Crimping Spade Lugs Onto the Speaker Wires 1. Strip about 1/4" of insulation from the speaker wire Slip the insulation boot over the speaker wire Twist all its strands tightly and insert the wire into the spade lug Use a crimping tool to crimp the spade lug onto the speaker wire Slip the insulation boot over the spade lug Once you have inserted the wire into the terminal, tighten the screw with a phillips or flat blade screwdriver. Connecting Speaker Wires Using Bare Wire If you wish, you may connect bare wire up to AWG 12 to the terminal strip on the S/PS-140. Make sure you remove only enough insulation so the wire can fit under the square washer of the terminal strip. Before inserting the wire, twist all its strands tightly to prevent strays that could cause a short circuit. (You may want to "tin" the stripped wire with solder to prevent it from fraying and oxidizing. ) Once you have inserted the wire into the terminal, tighten the screw with a phillips or flat blade screwdriver. -2- Operating Your S/PS-140 S/PS-140 Loudspeaker 1 2 3 4 Protect Loudspeaker Selectors Amplifier Protection Loudspeaker Selector Switches Once you have connected up to four pairs of loudspeakers to the S/PS-140, you can turn on any pair by simply pressing the designated selector switch for the speakers you want to hear. Speaker Impedances and the Amplifier Protection Switch When switching on multiple pairs of loudspeakers, you need to be aware of your amplifier's capability of safely driving all of the selected speakers. Most power amplifiers can easily drive impedances as low as 4 per channel. However, as you try to drive impedances below 4 , the amplifier may go into protection or even fail. You should use the protection switch whenever you connect any more than two pairs of 8 loudspeakers to your S/PS-140. The speaker protection selector switches in a 60 watt non-inductive resistor bank that keeps the amplifier from "seeing" impedances below 4 . This provides protection for amplifiers with up to 250 watts per channel from damage when driving multiple pairs of loudspeakers. With the protection switch engaged, you will experience a slight reduction volume from the loudspeakers. S/PS-140 Specifications Protection Wattage: Internal 60 watt non-inductive resistors protect amplifiers up to 250 watts per channel. 9 1/2" W x 1 3/4" H (2" with feet) x 7" 2 1/2 lb. Dimensions: Net Weight: Specifications subject to change or improvement without notice -3- Parasound Limited Warranty (USA only) Parasound Products, Inc. warrants products purchased from authorized Parasound Dealers and Custom Installers to the original owner for two years from the date of purchase. [. . . ] If it is decided that the unit should be returned for inspection at Parasound, it must be packed in its original carton as well as an additional outer carton. A Return Authorization (RA) number will be issued which must appear on the outer carton. A note stating the nature of the defect should accompany the unit. [. . . ]