Connecting the Resound Speaker System4Choosing the Correct cablesThe Resound series speakers connections are made via the rear panel 1/4-inch and/or Neutrik Speakon® connec-tors. Standard unshielded speaker wire, available at your local pro audio or music store, with either 1/4-inch phone orSpeakon connectors and wire gauge of 12-14 is recommended.If your amplifier uses binding posts you can use speaker cables with banana plugs, but be sure to pay attention to theplus and minus polarity when making the connections. It is important that your PA system is connected in phase other-wise you will not have the proper low-end response and stereo image.In order to ensure that your PA system is in phase, be careful to pay close attention to the positive and negative markingon the amplifier and wires. Make sure that the + terminal of the speaker, or banana connector, is connected to the + ter-minal of the power amplifier and that the - terminal of the speaker, or banana connector, is connected to the - terminal ofthe power amplifier.For a detailed wiring diagram, see page 36 of this manual.Here’s a tip: It’s fairly easy to identify a monitor that is out of phase just by listening, especially on a pop record. Listenfor the parts of the music that you would expect to be in the center of the mix like kick drum and vocals. If you do nothear them directly in the center (for instance they sound like they are two signals panned hard right and left) then youare more than likely listening to an out-of-phase monitor system. (This test won’t work on early Beatles records whereRingo’s drum kit is panned all the to the right side. Try a Madonna record.)-About ImpedanceBefore you hook up your speaker cabinet, be sure that you understand a little about impedance. Impedance is the elec-tronic load that the speaker puts on the power amplifier and is measured in Ohms.Here is the tricky, yet simple rule of impedance: When two speakers, of equal impedance are wired in "Parallel", like whenyou use the Extension Output, the total impedance is cut in half and when two speakers are wire in “Series”, (usually forinterna cabinet wiring only), the total impedance is the sum of the speakers individual impedance.Each of the Resound models, EXCEPT the RS215 is 8 Ohms. So, when two Resound models, EXCEPT the RS215 are con-nected together in parallel, the total impedance is 4 Ohms. The RS215 impedance is 4 Ohms. So, when two RS215’s areconnected together in parallel, the total impedance is 2 Ohms. The impedance of your speaker also has an effect on youramplifier. In general, the lower the impedance, the more power your amplifier will put out.IMPORTANT NOTE: There is minimum safe impedance for running power amplifiers so be sure to check the manufactur-er’s recommended impedance for your amplifier to avoid any damage to your amplifier or voiding your warranty.Using the EXTENSION OutputThe Resound models provide a convenient Extension Output for connecting additional speaker cabinets in parallel. Besure to read the section above on impedance to insure a proper hook up with your amplifier. To connect two Resoundsusing the Extension output, connect your amplifier output to the Input of the first Resound and then, connect theExtension Output to the Input of the second Resound.Powering the ResoundEach of the Resound loudspeakers have a specific power rating, which is printed on the input jack-plate, and also, in theSpecification section on page 10 of this manual. Be sure to check that your power amp has the correct power output foryour Resound. Be careful to consider the total impedance if you are connecting more the one Resound to one side of astereo power amplifier. Using a power amplifier with too low of a power rating can be dangerous since the output signalis often clipped in an effort to get the desired level. Over powering the Resound can result in catastrophic failure andtherefore using any amplifier with a power rating over the recommend power rating may void your warranty.ENGLISH4