User manual PARASOUND SPS140

[. . . ] O W N E R ' S M A N U A L S/PS-140 Loudspeaker Selector Congratulations on your purchase of this precision component and thank you for your selection of Parasound. We designed your Parasound S/PS-140 to switch up to four pair of speakers with the output of one amplifier. The S/PS-140 also has switchable protection to prevent amplifier overload. S/PS-140 Loudspeaker Selector 1 2 3 4 Protect Product Overview In many home audio systems, it is desirable to be able to listen to music in more than one area. [. . . ] Connecting Speaker Wires Using 1/4" Spade Lugs For ease of installation, we recommend that you use the gold-plated 1/4" spade lugs provided with your S/PS-140 for terminating all of your speaker connections. Also included are red and black insulation "boots" to insulate the speaker wire and to indicate proper polarity (see below). 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. In the event of a defect in materials or workmanship, the product will be repaired promptly without charge. [. . . ] A Return Authorization (RA) number will be issued which must appear on the outer carton. Units that arrive with evidence of mispacking (internal rattling, damaged carton) must be refused by Parasound. Parasound Products, Inc. 950 Battery Street, San Francisco, CA 94111 415-397-7100 / FAX 415-397-0144 -4- [. . . ]